diff --git a/packages/turf-isolines/README.md b/packages/turf-isolines/README.md
index 72f5757aa8..a16d481355 100644
--- a/packages/turf-isolines/README.md
+++ b/packages/turf-isolines/README.md
@@ -8,15 +8,16 @@ value breaks and generates [isolines](http://en.wikipedia.org/wiki/Isoline).
 **Parameters**
 
 -   `points` **[FeatureCollection](http://geojson.org/geojson-spec.html#feature-collection-objects)<[Point](http://geojson.org/geojson-spec.html#point)>** input points
--   `z` **[string](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String)** the property name in `points` from which z-values will be pulled
--   `resolution` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** resolution of the underlying grid
--   `breaks` **[Array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array)<[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)>** where to draw contours
+-   `breaks` **[Array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array)<[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)>** values of `zProperty` where to draw isolines
+-   `zProperty` **\[[string](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String)]** the property name in `points` from which z-values will be pulled (optional, default `'elevation'`)
+-   `propertiesToAllIsolines` **\[[Object](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object)]** GeoJSON properties passed to ALL isolines (optional, default `{}`)
+-   `propertiesPerIsoline` **\[[Array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array)<[Object](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object)>]** GeoJSON properties passed, in order, to the correspondent
+    isoline; the breaks array will define the order in which the isolines are created (optional, default `[]`)
 
 **Examples**
 
 ```javascript
-// create random points with random
-// z-values in their properties
+// create random points with random z-values in their properties
 var points = turf.random('point', 100, {
   bbox: [0, 30, 20, 50]
 });
@@ -24,11 +25,13 @@ for (var i = 0; i < points.features.length; i++) {
   points.features[i].properties.z = Math.random() * 10;
 }
 var breaks = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
-var isolined = turf.isolines(points, 'z', 15, breaks);
-//=isolined
+var isolines = turf.isolines(points, breaks, 'temperature');
+
+//addToMap
+var addToMap = [isolines];
 ```
 
-Returns **[FeatureCollection](http://geojson.org/geojson-spec.html#feature-collection-objects)&lt;[LineString](http://geojson.org/geojson-spec.html#linestring)>** isolines
+Returns **[FeatureCollection](http://geojson.org/geojson-spec.html#feature-collection-objects)&lt;[MultiLineString](http://geojson.org/geojson-spec.html#multilinestring)>** a FeatureCollection of [MultiLineString](http://geojson.org/geojson-spec.html#multilinestring) features representing isolines
 
 <!-- This file is automatically generated. Please don't edit it directly:
 if you find an error, edit the source file (likely index.js), and re-run
diff --git a/packages/turf-isolines/bench.js b/packages/turf-isolines/bench.js
index 878ccd928e..dc79d10415 100644
--- a/packages/turf-isolines/bench.js
+++ b/packages/turf-isolines/bench.js
@@ -1,18 +1,56 @@
-var isolines = require('./');
-var Benchmark = require('benchmark');
-var fs = require('fs');
+const fs = require('fs');
+const path = require('path');
+const load = require('load-json-file');
+const Benchmark = require('benchmark');
+const matrixToGrid = require('matrix-to-grid');
+const isolines = require('./');
 
-var points = JSON.parse(fs.readFileSync(__dirname+'/test/Points.geojson'));
+// Define Fixtures
+const directory = path.join(__dirname, 'test', 'in') + path.sep;
+const fixtures = fs.readdirSync(directory).map(filename => {
+    return {
+        filename,
+        name: path.parse(filename).name,
+        jsondata: load.sync(directory + filename)
+    };
+});
 
-var suite = new Benchmark.Suite('turf-isolines');
+/**
+ * Benchmark Results
+ *
+ * bigMatrix: 21.457ms
+ * matrix1: 0.741ms
+ * matrix2: 0.547ms
+ * pointGrid: 1.373ms
+ * bigMatrix x 168 ops/sec ±2.79% (72 runs sampled)
+ * matrix1 x 17,145 ops/sec ±4.73% (68 runs sampled)
+ * matrix2 x 11,004 ops/sec ±2.56% (79 runs sampled)
+ * pointGrid x 12,109 ops/sec ±2.01% (77 runs sampled)
+ */
+const suite = new Benchmark.Suite('turf-isolines');
+for (const {name, jsondata, filename} of fixtures) {
+    const {
+        breaks,
+        zProperty,
+        propertiesPerIsoline,
+        propertiesToAllIsolines,
+        matrix,
+        cellSize,
+        units,
+        origin} = jsondata.properties || jsondata;
+
+    // allow GeoJSON FeatureCollection or Matrix
+    let points;
+    if (filename.includes('geojson')) points = jsondata;
+    else points = matrixToGrid(matrix, origin, cellSize, {zProperty, units});
+
+    console.time(name);
+    isolines(points, breaks, zProperty, propertiesToAllIsolines, propertiesPerIsoline);
+    console.timeEnd(name);
+    suite.add(name, () => isolines(points, breaks, zProperty, propertiesToAllIsolines, propertiesPerIsoline));
+}
 suite
-  .add('turf-isolines',function () {
-    isolines(points, 'elevation', 15, [25, 45, 55, 65, 85,  95, 105, 120, 180]);
-  })
-  .on('cycle', function (event) {
-    console.log(String(event.target));
-  })
-  .on('complete', function () {
-    
-  })
+  .on('cycle', e => console.log(String(e.target)))
+  .on('complete', () => {})
   .run();
+
diff --git a/packages/turf-isolines/conrec.js b/packages/turf-isolines/conrec.js
deleted file mode 100644
index e7ad35e027..0000000000
--- a/packages/turf-isolines/conrec.js
+++ /dev/null
@@ -1,517 +0,0 @@
-/* eslint-disable */
-
-/*
- * Copyright (c) 2010, Jason Davies.
- *
- * All rights reserved.  This code is based on Bradley White's Java version,
- * which is in turn based on Nicholas Yue's C++ version, which in turn is based
- * on Paul D. Bourke's original Fortran version.  See below for the respective
- * copyright notices.
- *
- * See http://local.wasp.uwa.edu.au/~pbourke/papers/conrec/ for the original
- * paper by Paul D. Bourke.
- *
- * The vector conversion code is based on http://apptree.net/conrec.htm by
- * Graham Cox.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *     * Redistributions of source code must retain the above copyright
- *       notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above copyright
- *       notice, this list of conditions and the following disclaimer in the
- *       documentation and/or other materials provided with the distribution.
- *     * Neither the name of the <organization> nor the
- *       names of its contributors may be used to endorse or promote products
- *       derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
- * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-/*
- * Copyright (c) 1996-1997 Nicholas Yue
- *
- * This software is copyrighted by Nicholas Yue. This code is based on Paul D.
- * Bourke's CONREC.F routine.
- *
- * The authors hereby grant permission to use, copy, and distribute this
- * software and its documentation for any purpose, provided that existing
- * copyright notices are retained in all copies and that this notice is
- * included verbatim in any distributions. Additionally, the authors grant
- * permission to modify this software and its documentation for any purpose,
- * provided that such modifications are not distributed without the explicit
- * consent of the authors and that existing copyright notices are retained in
- * all copies. Some of the algorithms implemented by this software are
- * patented, observe all applicable patent law.
- *
- * IN NO EVENT SHALL THE AUTHORS OR DISTRIBUTORS BE LIABLE TO ANY PARTY FOR
- * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
- * OF THE USE OF THIS SOFTWARE, ITS DOCUMENTATION, OR ANY DERIVATIVES THEREOF,
- * EVEN IF THE AUTHORS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * THE AUTHORS AND DISTRIBUTORS SPECIFICALLY DISCLAIM ANY WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT.  THIS SOFTWARE IS
- * PROVIDED ON AN "AS IS" BASIS, AND THE AUTHORS AND DISTRIBUTORS HAVE NO
- * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR
- * MODIFICATIONS.
- */
-
-
-  module.exports = Conrec;
-
-  var EPSILON = 1e-10;
-
-  function pointsEqual(a, b) {
-      var x = a.x - b.x, y = a.y - b.y;
-      return x * x + y * y < EPSILON;
-  }
-
-  function reverseList(list) {
-      var pp = list.head;
-
-      while (pp) {
-      // swap prev/next pointers
-          var temp = pp.next;
-          pp.next = pp.prev;
-          pp.prev = temp;
-
-      // continue through the list
-          pp = temp;
-      }
-
-    // swap head/tail pointers
-      var temp = list.head;
-      list.head = list.tail;
-      list.tail = temp;
-  }
-
-  function ContourBuilder(level) {
-      this.level = level;
-      this.s = null;
-      this.count = 0;
-  }
-  ContourBuilder.prototype.remove_seq = function (list) {
-    // if list is the first item, static ptr s is updated
-      if (list.prev) {
-          list.prev.next = list.next;
-      } else {
-          this.s = list.next;
-      }
-
-      if (list.next) {
-          list.next.prev = list.prev;
-      }
-      --this.count;
-  };
-  ContourBuilder.prototype.addSegment = function (a, b) {
-      var ss = this.s;
-      var ma = null;
-      var mb = null;
-      var prependA = false;
-      var prependB = false;
-
-      while (ss) {
-          if (ma == null) {
-        // no match for a yet
-              if (pointsEqual(a, ss.head.p)) {
-                  ma = ss;
-                  prependA = true;
-              } else if (pointsEqual(a, ss.tail.p)) {
-                  ma = ss;
-              }
-          }
-          if (mb == null) {
-        // no match for b yet
-              if (pointsEqual(b, ss.head.p)) {
-                  mb = ss;
-                  prependB = true;
-              } else if (pointsEqual(b, ss.tail.p)) {
-                  mb = ss;
-              }
-          }
-      // if we matched both no need to continue searching
-          if (mb != null && ma != null) {
-              break;
-          } else {
-              ss = ss.next;
-          }
-      }
-
-    // c is the case selector based on which of ma and/or mb are set
-      var c = ((ma != null) ? 1 : 0) | ((mb != null) ? 2 : 0);
-
-      switch (c) {
-      case 0:   // both unmatched, add as new sequence
-          var aa = {p: a, prev: null};
-          var bb = {p: b, next: null};
-          aa.next = bb;
-          bb.prev = aa;
-
-        // create sequence element and push onto head of main list. The order
-        // of items in this list is unimportant
-          ma = {head: aa, tail: bb, next: this.s, prev: null, closed: false};
-          if (this.s) {
-              this.s.prev = ma;
-          }
-          this.s = ma;
-
-          ++this.count;    // not essential - tracks number of unmerged sequences
-          break;
-
-      case 1:   // a matched, b did not - thus b extends sequence ma
-          var pp = {p: b};
-
-          if (prependA) {
-              pp.next = ma.head;
-              pp.prev = null;
-              ma.head.prev = pp;
-              ma.head = pp;
-          } else {
-              pp.next = null;
-              pp.prev = ma.tail;
-              ma.tail.next = pp;
-              ma.tail = pp;
-          }
-          break;
-
-      case 2:   // b matched, a did not - thus a extends sequence mb
-          var pp = {p: a};
-
-          if (prependB) {
-              pp.next = mb.head;
-              pp.prev = null;
-              mb.head.prev = pp;
-              mb.head = pp;
-          } else {
-              pp.next = null;
-              pp.prev = mb.tail;
-              mb.tail.next = pp;
-              mb.tail = pp;
-          }
-          break;
-
-      case 3:   // both matched, can merge sequences
-        // if the sequences are the same, do nothing, as we are simply closing this path (could set a flag)
-
-          if (ma === mb) {
-              var pp = {p: ma.tail.p, next: ma.head, prev: null};
-              ma.head.prev = pp;
-              ma.head = pp;
-              ma.closed = true;
-              break;
-          }
-
-        // there are 4 ways the sequence pair can be joined. The current setting of prependA and
-        // prependB will tell us which type of join is needed. For head/head and tail/tail joins
-        // one sequence needs to be reversed
-          switch ((prependA ? 1 : 0) | (prependB ? 2 : 0)) {
-          case 0:   // tail-tail
-            // reverse ma and append to mb
-              reverseList(ma);
-            // fall through to head/tail case
-          case 1:   // head-tail
-            // ma is appended to mb and ma discarded
-              mb.tail.next = ma.head;
-              ma.head.prev = mb.tail;
-              mb.tail = ma.tail;
-
-            //discard ma sequence record
-              this.remove_seq(ma);
-              break;
-
-          case 3:   // head-head
-            // reverse ma and append mb to it
-              reverseList(ma);
-            // fall through to tail/head case
-          case 2:   // tail-head
-            // mb is appended to ma and mb is discarded
-              ma.tail.next = mb.head;
-              mb.head.prev = ma.tail;
-              ma.tail = mb.tail;
-
-            //discard mb sequence record
-              this.remove_seq(mb);
-              break;
-          }
-      }
-  };
-
-  /*
-   * Implements CONREC.
-   *
-   * @private
-   * @param {function} drawContour function for drawing contour.  Defaults to a
-   *                               custom "contour builder", which populates the
-   *                               contours property.
-   */
-  function Conrec(drawContour) {
-      if (!drawContour) {
-          var c = this;
-          c.contours = {};
-      /**
-       * drawContour - interface for implementing the user supplied method to
-       * render the countours.
-       *
-       * Draws a line between the start and end coordinates.
-       *
-       * @private
-       * @param startX    - start coordinate for X
-       * @param startY    - start coordinate for Y
-       * @param endX      - end coordinate for X
-       * @param endY      - end coordinate for Y
-       * @param contourLevel - Contour level for line.
-       */
-          this.drawContour = function (startX, startY, endX, endY, contourLevel, k) {
-              var cb = c.contours[k];
-              if (!cb) {
-                  cb = c.contours[k] = new ContourBuilder(contourLevel);
-              }
-              cb.addSegment({x: startX, y: startY}, {x: endX, y: endY});
-          };
-          this.contourList = function () {
-              var l = [];
-              var a = c.contours;
-              for (var k in a) {
-                  var s = a[k].s;
-                  var level = a[k].level;
-                  while (s) {
-                      var h = s.head;
-                      var l2 = [];
-                      l2.level = level;
-                      l2.k = k;
-                      while (h && h.p) {
-                          l2.push(h.p);
-                          h = h.next;
-                      }
-                      l.push(l2);
-                      s = s.next;
-                  }
-              }
-              l.sort(function (a, b) { return a.k - b.k; });
-              return l;
-          };
-      } else {
-          this.drawContour = drawContour;
-      }
-      this.h  = new Array(5);
-      this.sh = new Array(5);
-      this.xh = new Array(5);
-      this.yh = new Array(5);
-  }
-
-  /*
-   * contour is a contouring subroutine for rectangularily spaced data
-   *
-   * It emits calls to a line drawing subroutine supplied by the user which
-   * draws a contour map corresponding to real*4data on a randomly spaced
-   * rectangular grid. The coordinates emitted are in the same units given in
-   * the x() and y() arrays.
-   *
-   * Any number of contour levels may be specified but they must be in order of
-   * increasing value.
-   *
-   *
-   * @param {number[][]} d - matrix of data to contour
-   * @param {number} ilb,iub,jlb,jub - index bounds of data matrix
-   *
-   *             The following two, one dimensional arrays (x and y) contain
-   *             the horizontal and vertical coordinates of each sample points.
-   * @param {number[]} x  - data matrix column coordinates
-   * @param {number[]} y  - data matrix row coordinates
-   * @param {number} nc   - number of contour levels
-   * @param {number[]} z  - contour levels in increasing order.
-   */
-  Conrec.prototype.contour = function (d, ilb, iub, jlb, jub, x, y, nc, z) {
-      var h = this.h, sh = this.sh, xh = this.xh, yh = this.yh;
-      var drawContour = this.drawContour;
-      this.contours = {};
-
-      var xsect = function (p1, p2) {
-          return (h[p2] * xh[p1] - h[p1] * xh[p2]) / (h[p2] - h[p1]);
-      };
-
-      var ysect = function (p1, p2) {
-          return (h[p2] * yh[p1] - h[p1] * yh[p2]) / (h[p2] - h[p1]);
-      };
-      var m1;
-      var m2;
-      var m3;
-      var case_value;
-      var dmin;
-      var dmax;
-      var x1 = 0.0;
-      var x2 = 0.0;
-      var y1 = 0.0;
-      var y2 = 0.0;
-
-    // The indexing of im and jm should be noted as it has to start from zero
-    // unlike the fortran counter part
-      var im = [0, 1, 1, 0];
-      var jm = [0, 0, 1, 1];
-
-    // Note that castab is arranged differently from the FORTRAN code because
-    // Fortran and C/C++ arrays are transposed of each other, in this case
-    // it is more tricky as castab is in 3 dimensions
-      var castab = [
-          [
-        [0, 0, 8], [0, 2, 5], [7, 6, 9]
-          ],
-          [
-        [0, 3, 4], [1, 3, 1], [4, 3, 0]
-          ],
-          [
-        [9, 6, 7], [5, 2, 0], [8, 0, 0]
-          ]
-      ];
-
-      for (var j = (jub - 1); j >= jlb; j--) {
-          for (var i = ilb; i <= iub - 1; i++) {
-              var temp1, temp2;
-              temp1 = Math.min(d[i][j], d[i][j + 1]);
-              temp2 = Math.min(d[i + 1][j], d[i + 1][j + 1]);
-              dmin  = Math.min(temp1, temp2);
-              temp1 = Math.max(d[i][j], d[i][j + 1]);
-              temp2 = Math.max(d[i + 1][j], d[i + 1][j + 1]);
-              dmax  = Math.max(temp1, temp2);
-
-              if (dmax >= z[0] && dmin <= z[nc - 1]) {
-                  for (var k = 0; k < nc; k++) {
-                      if (z[k] >= dmin && z[k] <= dmax) {
-                          for (var m = 4; m >= 0; m--) {
-                            if (m > 0) {
-                  // The indexing of im and jm should be noted as it has to
-                  // start from zero
-                              h[m] = d[i + im[m - 1]][j + jm[m - 1]] - z[k];
-                              xh[m] = x[i + im[m - 1]];
-                              yh[m] = y[j + jm[m - 1]];
-                          } else {
-                              h[0] = 0.25 * (h[1] + h[2] + h[3] + h[4]);
-                              xh[0] = 0.5 * (x[i] + x[i + 1]);
-                              yh[0] = 0.5 * (y[j] + y[j + 1]);
-                          }
-                            if (h[m] > EPSILON) {
-                              sh[m] = 1;
-                          } else if (h[m] < -EPSILON) {
-                            sh[m] = -1;
-                        } else
-                  sh[m] = 0;
-                        }
-              //
-              // Note: at this stage the relative heights of the corners and the
-              // centre are in the h array, and the corresponding coordinates are
-              // in the xh and yh arrays. The centre of the box is indexed by 0
-              // and the 4 corners by 1 to 4 as shown below.
-              // Each triangle is then indexed by the parameter m, and the 3
-              // vertices of each triangle are indexed by parameters m1,m2,and
-              // m3.
-              // It is assumed that the centre of the box is always vertex 2
-              // though this isimportant only when all 3 vertices lie exactly on
-              // the same contour level, in which case only the side of the box
-              // is drawn.
-              //
-              //
-              //      vertex 4 +-------------------+ vertex 3
-              //               | \               / |
-              //               |   \    m-3    /   |
-              //               |     \       /     |
-              //               |       \   /       |
-              //               |  m=2    X   m=2   |       the centre is vertex 0
-              //               |       /   \       |
-              //               |     /       \     |
-              //               |   /    m=1    \   |
-              //               | /               \ |
-              //      vertex 1 +-------------------+ vertex 2
-              //
-              //
-              //
-              //               Scan each triangle in the box
-              //
-                          for (m = 1; m <= 4; m++) {
-                            m1 = m;
-                            m2 = 0;
-                            if (m != 4) {
-                              m3 = m + 1;
-                          } else {
-                              m3 = 1;
-                          }
-                            case_value = castab[sh[m1] + 1][sh[m2] + 1][sh[m3] + 1];
-                            if (case_value != 0) {
-                              switch (case_value) {
-                            case 1: // Line between vertices 1 and 2
-                                x1 = xh[m1];
-                                y1 = yh[m1];
-                                x2 = xh[m2];
-                                y2 = yh[m2];
-                                break;
-                            case 2: // Line between vertices 2 and 3
-                                x1 = xh[m2];
-                                y1 = yh[m2];
-                                x2 = xh[m3];
-                                y2 = yh[m3];
-                                break;
-                            case 3: // Line between vertices 3 and 1
-                                x1 = xh[m3];
-                                y1 = yh[m3];
-                                x2 = xh[m1];
-                                y2 = yh[m1];
-                                break;
-                            case 4: // Line between vertex 1 and side 2-3
-                                x1 = xh[m1];
-                                y1 = yh[m1];
-                                x2 = xsect(m2, m3);
-                                y2 = ysect(m2, m3);
-                                break;
-                            case 5: // Line between vertex 2 and side 3-1
-                                x1 = xh[m2];
-                                y1 = yh[m2];
-                                x2 = xsect(m3, m1);
-                                y2 = ysect(m3, m1);
-                                break;
-                            case 6: //  Line between vertex 3 and side 1-2
-                                x1 = xh[m3];
-                                y1 = yh[m3];
-                                x2 = xsect(m1, m2);
-                                y2 = ysect(m1, m2);
-                                break;
-                            case 7: // Line between sides 1-2 and 2-3
-                                x1 = xsect(m1, m2);
-                                y1 = ysect(m1, m2);
-                                x2 = xsect(m2, m3);
-                                y2 = ysect(m2, m3);
-                                break;
-                            case 8: // Line between sides 2-3 and 3-1
-                                x1 = xsect(m2, m3);
-                                y1 = ysect(m2, m3);
-                                x2 = xsect(m3, m1);
-                                y2 = ysect(m3, m1);
-                                break;
-                            case 9: // Line between sides 3-1 and 1-2
-                                x1 = xsect(m3, m1);
-                                y1 = ysect(m3, m1);
-                                x2 = xsect(m1, m2);
-                                y2 = ysect(m1, m2);
-                                break;
-                            default:
-                                break;
-                            }
-                  // Put your processing code here and comment out the printf
-                  //printf("%f %f %f %f %f\n",x1,y1,x2,y2,z[k]);
-                              drawContour(x1, y1, x2, y2, z[k], k);
-                          }
-                        }
-                      }
-                  }
-              }
-          }
-      }
-  };
diff --git a/packages/turf-isolines/index.d.ts b/packages/turf-isolines/index.d.ts
index b85847a950..1a8107fec1 100644
--- a/packages/turf-isolines/index.d.ts
+++ b/packages/turf-isolines/index.d.ts
@@ -1,11 +1,14 @@
-/// <reference types="geojson" />
-
-type Points = GeoJSON.FeatureCollection<GeoJSON.Point>;
-type LineStrings = GeoJSON.FeatureCollection<GeoJSON.LineString>;
+import {Points, MultiLineStrings} from '@turf/helpers'
 
 /**
  * http://turfjs.org/docs/#isolines
  */
-declare function isolines(points: Points, z: string, resolution: number, breaks: Array<number>): LineStrings;
+declare function isolines(
+    points: Points,
+    breaks: number[],
+    zProperty?:string,
+    propertiesToAllIsolines?: Object,
+    propertiesPerIsoline?: Object[]): MultiLineStrings;
+
 declare namespace isolines { }
 export = isolines;
diff --git a/packages/turf-isolines/index.js b/packages/turf-isolines/index.js
index f9069df1ca..7582e6cd2b 100644
--- a/packages/turf-isolines/index.js
+++ b/packages/turf-isolines/index.js
@@ -1,17 +1,13 @@
-//https://github.com/jasondavies/conrec.js
-//http://stackoverflow.com/questions/263305/drawing-a-topographical-map
-var tin = require('@turf/tin');
 var bbox = require('@turf/bbox');
-var grid = require('@turf/point-grid');
-var inside = require('@turf/inside');
-var square = require('@turf/square');
+var meta = require('@turf/meta');
 var helpers = require('@turf/helpers');
-var distance = require('@turf/distance');
-var planepoint = require('@turf/planepoint');
-var featurecollection = helpers.featureCollection;
-var linestring = helpers.lineString;
-var point = helpers.point;
-var Conrec = require('./conrec');
+var invariant = require('@turf/invariant');
+var gridToMatrix = require('grid-to-matrix');
+var marchingsquares = require('marchingsquares');
+var multiLineString = helpers.multiLineString;
+var coordEach = meta.coordEach;
+var collectionOf = invariant.collectionOf;
+var featureCollection = helpers.featureCollection;
 
 /**
  * Takes {@link Point|points} with z-values and an array of
@@ -19,13 +15,14 @@ var Conrec = require('./conrec');
  *
  * @name isolines
  * @param {FeatureCollection<Point>} points input points
- * @param {string} z the property name in `points` from which z-values will be pulled
- * @param {number} resolution resolution of the underlying grid
- * @param {Array<number>} breaks where to draw contours
- * @returns {FeatureCollection<LineString>} isolines
+ * @param {Array<number>} breaks values of `zProperty` where to draw isolines
+ * @param {string} [zProperty='elevation'] the property name in `points` from which z-values will be pulled
+ * @param {Object} [propertiesToAllIsolines={}] GeoJSON properties passed to ALL isolines
+ * @param {Array<Object>} [propertiesPerIsoline=[]] GeoJSON properties passed, in order, to the correspondent
+ * isoline; the breaks array will define the order in which the isolines are created
+ * @returns {FeatureCollection<MultiLineString>} a FeatureCollection of {@link MultiLineString} features representing isolines
  * @example
- * // create random points with random
- * // z-values in their properties
+ * // create random points with random z-values in their properties
  * var points = turf.random('point', 100, {
  *   bbox: [0, 30, 20, 50]
  * });
@@ -33,68 +30,113 @@ var Conrec = require('./conrec');
  *   points.features[i].properties.z = Math.random() * 10;
  * }
  * var breaks = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
- * var isolined = turf.isolines(points, 'z', 15, breaks);
- * //=isolined
+ * var isolines = turf.isolines(points, breaks, 'temperature');
+ *
+ * //addToMap
+ * var addToMap = [isolines];
  */
-module.exports = function (points, z, resolution, breaks) {
-    var tinResult = tin(points, z);
-    var bboxBBox = bbox(points);
-    var squareBBox = square(bboxBBox);
-    var sizeCellGrid = distance(point([squareBBox[0], squareBBox[1]]), point([squareBBox[2], squareBBox[1]]), 'kilometers') / resolution;
-    var gridResult = grid(squareBBox, sizeCellGrid, 'kilometers');
-    var data = [];
+module.exports = function (points, breaks, zProperty, propertiesToAllIsolines, propertiesPerIsoline) {
+    // Default Params
+    zProperty = zProperty || 'elevation';
+    propertiesToAllIsolines = propertiesToAllIsolines || {};
+    propertiesPerIsoline = propertiesPerIsoline || [];
 
-    for (var i = 0; i < gridResult.features.length; i++) {
-        var pt = gridResult.features[i];
-        for (var j = 0; j < tinResult.features.length; j++) {
-            var triangle = tinResult.features[j];
-            if (inside(pt, triangle)) {
-                pt.properties = {};
-                pt.properties[z] = planepoint(pt, triangle);
-            }
-        }
-    }
+    // Input validation
+    collectionOf(points, 'Point', 'Input must contain Points');
+    if (!breaks) throw new Error('breaks is required');
+    if (!Array.isArray(breaks)) throw new Error('breaks must be an Array');
+    if (!isObject(propertiesToAllIsolines)) throw new Error('propertiesToAllIsolines must be an Object');
+    if (!Array.isArray(propertiesPerIsoline)) throw new Error('propertiesPerIsoline must be an Array');
+    if (typeof zProperty !== 'string') throw new Error('zProperty must be a string');
 
-    var depth = Math.sqrt(gridResult.features.length);
-    for (var x = 0; x < depth; x++) {
-        var xGroup = gridResult.features.slice(x * depth, (x + 1) * depth);
-        var xFlat = [];
+    // Isolined methods
+    var matrix = gridToMatrix(points, zProperty, true);
+    var isolines = createIsoLines(matrix, breaks, zProperty, propertiesToAllIsolines, propertiesPerIsoline);
+    var scaledIsolines = rescaleIsolines(isolines, matrix, points);
 
-        for (var g = 0; g < xGroup.length; g++) {
-            if (xGroup[g].properties) {
-                xFlat.push(xGroup[g].properties[z]);
-            } else {
-                xFlat.push(0);
-            }
-        }
-        data.push(xFlat);
-    }
-    var interval = (squareBBox[2] - squareBBox[0]) / depth;
-    var xCoordinates = [];
-    var yCoordinates = [];
-    for (var d = 0; d < depth; d++) {
-        xCoordinates.push(d * interval + squareBBox[0]);
-        yCoordinates.push(d * interval + squareBBox[1]);
+    return featureCollection(scaledIsolines);
+};
+
+/**
+ * Creates the isolines lines (featuresCollection of MultiLineString features) from the 2D data grid
+ *
+ * Marchingsquares process the grid data as a 3D representation of a function on a 2D plane, therefore it
+ * assumes the points (x-y coordinates) are one 'unit' distance. The result of the isolines function needs to be
+ * rescaled, with turfjs, to the original area and proportions on the map
+ *
+ * @private
+ * @param {Array<Array<number>>} matrix Grid Data
+ * @param {Array<number>} breaks Breaks
+ * @param {string} zProperty name of the z-values property
+ * @param {Object} [propertiesToAllIsolines={}] GeoJSON properties passed to ALL isolines
+ * @param {Object} [propertiesPerIsoline=[]] GeoJSON properties passed to the correspondent isoline
+ * @returns {Array<MultiLineString>} isolines
+ */
+function createIsoLines(matrix, breaks, zProperty, propertiesToAllIsolines, propertiesPerIsoline) {
+    var isolines = [];
+    for (var i = 1; i < breaks.length; i++) {
+        var threshold = +breaks[i]; // make sure it's a number
+
+        var properties = Object.assign(
+            {},
+            propertiesToAllIsolines,
+            propertiesPerIsoline[i]
+        );
+        properties[zProperty] = threshold;
+        var isoline = multiLineString(marchingsquares.isoContours(matrix, threshold), properties);
+
+        isolines.push(isoline);
     }
+    return isolines;
+}
 
-    var c = new Conrec();
-    c.contour(data, 0, resolution, 0, resolution, xCoordinates, yCoordinates, breaks.length, breaks);
-    var contourList = c.contourList();
+/**
+ * Translates and scales isolines
+ *
+ * @private
+ * @param {Array<MultiLineString>} isolines to be rescaled
+ * @param {Array<Array<number>>} matrix Grid Data
+ * @param {Object} points Points by Latitude
+ * @returns {Array<MultiLineString>} isolines
+ */
+function rescaleIsolines(isolines, matrix, points) {
+
+    // get dimensions (on the map) of the original grid
+    var gridBbox = bbox(points); // [ minX, minY, maxX, maxY ]
+    var originalWidth = gridBbox[2] - gridBbox[0];
+    var originalHeigth = gridBbox[3] - gridBbox[1];
+
+    // get origin, which is the first point of the last row on the rectangular data on the map
+    var x0 = gridBbox[0];
+    var y0 = gridBbox[1];
+
+    // get number of cells per side
+    var matrixWidth = matrix[0].length - 1;
+    var matrixHeight = matrix.length - 1;
 
-    var fc = featurecollection([]);
-    contourList.forEach(function (c) {
-        if (c.length > 2) {
-            var polyCoordinates = [];
-            c.forEach(function (coord) {
-                polyCoordinates.push([coord.x, coord.y]);
-            });
-            var poly = linestring(polyCoordinates);
-            poly.properties = {};
-            poly.properties[z] = c.level;
+    // calculate the scaling factor between matrix and rectangular grid on the map
+    var scaleX = originalWidth / matrixWidth;
+    var scaleY = originalHeigth / matrixHeight;
 
-            fc.features.push(poly);
-        }
+    var resize = function (point) {
+        point[0] = point[0] * scaleX + x0;
+        point[1] = point[1] * scaleY + y0;
+    };
+
+    // resize and shift each point/line of the isolines
+    isolines.forEach(function (isoline) {
+        coordEach(isoline, resize);
     });
+    return isolines;
+}
 
-    return fc;
-};
+/**
+ * Checks input type
+ *
+ * @private
+ * @param {*} input to be checked
+ * @returns {boolean} true if the input is an Object
+ */
+function isObject(input) {
+    return (!!input) && (input.constructor === Object);
+}
diff --git a/packages/turf-isolines/package.json b/packages/turf-isolines/package.json
index 935fe3adde..7a0d5332a1 100644
--- a/packages/turf-isolines/package.json
+++ b/packages/turf-isolines/package.json
@@ -6,8 +6,7 @@
   "types": "index.d.ts",
   "files": [
     "index.js",
-    "index.d.ts",
-    "conrec.js"
+    "index.d.ts"
   ],
   "scripts": {
     "test": "node test.js",
@@ -26,23 +25,30 @@
     "topography"
   ],
   "author": "Turf Authors",
+  "contributors": [
+    "Stefano Borghi <@stebogit>"
+  ],
   "license": "MIT",
   "bugs": {
     "url": "https://github.com/Turfjs/turf/issues"
   },
   "homepage": "https://github.com/Turfjs/turf",
   "devDependencies": {
+    "@turf/envelope": "^4.4.0",
+    "@turf/point-grid": "^3.14.0",
+    "@turf/random": "^3.13.0",
     "benchmark": "^2.1.4",
-    "tape": "^4.6.3"
+    "load-json-file": "^2.0.0",
+    "matrix-to-grid": "3.0.0",
+    "tape": "^4.6.3",
+    "write-json-file": "^2.0.0"
   },
   "dependencies": {
     "@turf/bbox": "^4.4.0",
-    "@turf/distance": "^4.4.0",
     "@turf/helpers": "^4.4.0",
-    "@turf/inside": "^4.4.0",
-    "@turf/planepoint": "^4.4.0",
-    "@turf/point-grid": "^4.4.0",
-    "@turf/square": "^4.4.0",
-    "@turf/tin": "^4.4.0"
+    "@turf/invariant": "^4.4.0",
+    "@turf/meta": "^4.4.0",
+    "grid-to-matrix": "^1.2.0",
+    "marchingsquares": "^1.2.0"
   }
 }
diff --git a/packages/turf-isolines/test.js b/packages/turf-isolines/test.js
index bdd9752c0e..ffdab93dd9 100644
--- a/packages/turf-isolines/test.js
+++ b/packages/turf-isolines/test.js
@@ -1,16 +1,80 @@
-var test = require('tape');
-var fs = require('fs');
-var path = require('path');
-var isolines = require('./');
+const fs = require('fs');
+const test = require('tape');
+const path = require('path');
+const load = require('load-json-file');
+const write = require('write-json-file');
+const random = require('@turf/random');
+const envelope = require('@turf/envelope');
+const pointGrid = require('@turf/point-grid');
+const {getCoords} = require('@turf/invariant');
+const matrixToGrid = require('matrix-to-grid');
+const {lineString} = require('@turf/helpers');
+const isolines = require('./');
 
-test('isolines', function (t) {
-  var points = JSON.parse(fs.readFileSync(path.join(__dirname, 'test/Points.geojson')));
+const directories = {
+    in: path.join(__dirname, 'test', 'in') + path.sep,
+    out: path.join(__dirname, 'test', 'out') + path.sep
+};
 
-  var isolined = isolines(points, 'elevation', 15, [25, 45, 55, 65, 85,  95, 105, 120, 180]);
+const fixtures = fs.readdirSync(directories.in).map(filename => {
+    return {
+        filename,
+        name: path.parse(filename).name,
+        jsondata: load.sync(directories.in + filename)
+    };
+});
+
+test('isolines', t => {
+    fixtures.forEach(({name, jsondata, filename}) => {
+        const {
+            breaks,
+            zProperty,
+            propertiesPerIsoline,
+            propertiesToAllIsolines,
+            matrix,
+            cellSize,
+            units,
+            origin} = jsondata.properties || jsondata;
+
+        // allow GeoJSON FeatureCollection or Matrix
+        let points;
+        if (filename.includes('geojson')) points = jsondata;
+        else points = matrixToGrid(matrix, origin, cellSize, {zProperty, units});
+
+        const results = isolines(points, breaks, zProperty, propertiesToAllIsolines, propertiesPerIsoline);
+
+        const box = lineString(getCoords(envelope(points))[0]);
+        box.properties['stroke'] = '#F00';
+        box.properties['stroke-width'] = 1;
+        results.features.push(box);
+
+        if (process.env.REGEN) write.sync(directories.out + name + '.geojson', results);
+        t.deepEqual(results, load.sync(directories.out + name + '.geojson'), name);
+    });
+
+    t.end();
+});
+
+test('isolines -- throws', t => {
+    const points = pointGrid([-70.823364, -33.553984, -70.473175, -33.302986], 5);
+
+    t.throws(() => isolines(random('polygon'), [1, 2, 3]), 'invalid points');
+    t.throws(() => isolines(points), /breaks is required/);
+    t.throws(() => isolines(points, 'string'), /breaks must be an Array/);
+    t.throws(() => isolines(points, [1, 2, 3], 5), /zProperty must be a string/);
+    t.throws(() => isolines(points, [1, 2, 3], 'temp', 'string'), /propertiesToAllIsolines must be an Object/);
+    t.throws(() => isolines(points, [1, 2, 3], 'temp', {}, 'string'), /propertiesPerIsoline must be an Array/);
+
+    t.end();
+});
 
-  t.ok(isolined.features, 'should take a set of points with z values and output a set of contour lines');
-  t.equal(isolined.features[0].geometry.type, 'LineString');
+test('isolines -- handling properties', t => {
+    const points = pointGrid([-70.823364, -33.553984, -70.473175, -33.302986], 5);
+    const propertiesToAllIsolines = {name: 'unknown', source: 'foobar'};
+    const propertiesPerIsoline = [{name: 'break1'}, {name: 'break2'}, {name: 'break3'}];
 
-  fs.writeFileSync(path.join(__dirname, 'test/isolines.geojson'), JSON.stringify(isolined));
-  t.end();
+    const lines = isolines(points, [1, 2, 3], 'z', propertiesToAllIsolines, propertiesPerIsoline);
+    t.equal(lines.features[0].properties.name, 'break2');
+    t.equal(lines.features[0].properties.source, 'foobar');
+    t.end();
 });
diff --git a/packages/turf-isolines/test/in/bigMatrix.json b/packages/turf-isolines/test/in/bigMatrix.json
new file mode 100644
index 0000000000..7d5ee45c26
--- /dev/null
+++ b/packages/turf-isolines/test/in/bigMatrix.json
@@ -0,0 +1,33 @@
+{
+  "origin": [ 6.5, 46 ],
+  "cellSize": 10,
+  "breaks": [0, 0.24, 0.5, 1.5, 2.5, 100],
+  "zProperty": "pressure",
+  "propertiesToAllIsolines": {
+    "stroke-width": 4,
+    "fill-opacity": 0.4
+  },
+  "propertiesPerIsoline": [
+    {
+      "stroke": "grey",
+      "fill": "grey"
+    },
+    {
+      "stroke": "blue",
+      "fill": "blue"
+    },
+    {
+      "stroke": "green",
+      "fill": "green"
+    },
+    {
+      "stroke": "yellow",
+      "fill": "yellow"
+    },
+    {
+      "stroke": "red",
+      "fill": "red"
+    }
+  ],
+  "matrix": 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+}
\ No newline at end of file
diff --git a/packages/turf-isolines/test/in/matrix1.json b/packages/turf-isolines/test/in/matrix1.json
new file mode 100644
index 0000000000..16ea0b2af0
--- /dev/null
+++ b/packages/turf-isolines/test/in/matrix1.json
@@ -0,0 +1,14 @@
+{
+  "matrix": [
+    [ 1, 1,  1,  1,  1, 1, 1],
+    [ 1, 5,  5,  5,  5, 5, 1],
+    [ 1, 5, 15, 15, 15, 5, 1],
+    [ 1, 5, 10, 10, 10, 5, 1],
+    [ 1, 5,  5,  5,  5, 5, 1],
+    [ 1, 1,  1,  1,  1, 1, 1]
+  ],
+  "origin": [ 10.8, 44.1 ],
+  "cellSize": 20,
+  "breaks": [2, 4, 8, 12],
+  "zProperty": "temperature"
+}
\ No newline at end of file
diff --git a/packages/turf-isolines/test/in/matrix2.json b/packages/turf-isolines/test/in/matrix2.json
new file mode 100644
index 0000000000..6321af3db6
--- /dev/null
+++ b/packages/turf-isolines/test/in/matrix2.json
@@ -0,0 +1,32 @@
+{
+  "matrix": [
+    [18, 13, 10,  9, 10, 13, 18],
+    [13,  8,  5,  4,  5,  8, 13],
+    [10,  5,  2,  1,  2,  5, 10],
+    [10,  5,  2,  1,  2,  5, 10],
+    [ 9,  4,  1, 12,  1,  4,  9],
+    [10,  5,  2,  1,  2,  5, 10],
+    [10,  5,  2,  1,  2,  5, 10],
+    [13,  8,  5,  4,  5,  8, 13],
+    [18, 13, 10,  9, 10, 13, 18]
+],
+  "origin": [ 10.85, 44 ],
+  "cellSize": 20,
+  "breaks": [0, 4.5, 9, 13.5, 18],
+  "propertiesToAllIsolines": {
+    "stroke-width": 3,
+    "stroke": "darkred",
+    "fill": "darkred"
+  },
+  "propertiesPerIsoline": [
+    {
+      "fill-opacity": 0.4
+    },{
+      "fill-opacity": 0.5
+    },{
+      "fill-opacity": 0.7
+    },{
+      "fill-opacity": 0.8
+    }
+  ]
+}
diff --git a/packages/turf-isolines/test/in/pointGrid.geojson b/packages/turf-isolines/test/in/pointGrid.geojson
new file mode 100644
index 0000000000..82cc722009
--- /dev/null
+++ b/packages/turf-isolines/test/in/pointGrid.geojson
@@ -0,0 +1,485 @@
+{
+    "type": "FeatureCollection",
+    "properties": {
+      "breaks": [0, 20, 40, 80, 160],
+      "propertiesPerIsoline": [
+        {
+          "fill-opacity": 0.5
+        },
+        {
+          "fill-opacity": 0.6
+        },
+        {
+          "fill-opacity": 0.7
+        },
+        {
+          "fill-opacity": 0.8
+        }
+      ],
+      "zProperty": "population"
+    },
+    "features": [
+      {
+        "type": "Feature",
+        "properties": { "population": 4 },
+        "geometry": {
+          "type": "Point",
+          "coordinates": [
+            -70.823364,
+            -33.553984
+          ]
+        }
+      },
+      {
+        "type": "Feature",
+        "properties": { "population": 42 },
+        "geometry": {
+          "type": "Point",
+          "coordinates": [
+            -70.823364,
+            -33.50903203113676
+          ]
+        }
+      },
+      {
+        "type": "Feature",
+        "properties": { "population": 65 },
+        "geometry": {
+          "type": "Point",
+          "coordinates": [
+            -70.823364,
+            -33.464080062273524
+          ]
+        }
+      },
+      {
+        "type": "Feature",
+        "properties": { "population": 6 },
+        "geometry": {
+          "type": "Point",
+          "coordinates": [
+            -70.823364,
+            -33.419128093410286
+          ]
+        }
+      },
+      {
+        "type": "Feature",
+        "properties": { "population": 56 },
+        "geometry": {
+          "type": "Point",
+          "coordinates": [
+            -70.823364,
+            -33.37417612454705
+          ]
+        }
+      },
+      {
+        "type": "Feature",
+        "properties": { "population": 155 },
+        "geometry": {
+          "type": "Point",
+          "coordinates": [
+            -70.823364,
+            -33.32922415568381
+          ]
+        }
+      },
+      {
+        "type": "Feature",
+        "properties": { "population": 15 },
+        "geometry": {
+          "type": "Point",
+          "coordinates": [
+            -70.76942368848808,
+            -33.553984
+          ]
+        }
+      },
+      {
+        "type": "Feature",
+        "properties": { "population": 0 },
+        "geometry": {
+          "type": "Point",
+          "coordinates": [
+            -70.76942368848808,
+            -33.50903203113676
+          ]
+        }
+      },
+      {
+        "type": "Feature",
+        "properties": { "population": 34 },
+        "geometry": {
+          "type": "Point",
+          "coordinates": [
+            -70.76942368848808,
+            -33.464080062273524
+          ]
+        }
+      },
+      {
+        "type": "Feature",
+        "properties": { "population": 3 },
+        "geometry": {
+          "type": "Point",
+          "coordinates": [
+            -70.76942368848808,
+            -33.419128093410286
+          ]
+        }
+      },
+      {
+        "type": "Feature",
+        "properties": { "population": 3 },
+        "geometry": {
+          "type": "Point",
+          "coordinates": [
+            -70.76942368848808,
+            -33.37417612454705
+          ]
+        }
+      },
+      {
+        "type": "Feature",
+        "properties": { "population": 36 },
+        "geometry": {
+          "type": "Point",
+          "coordinates": [
+            -70.76942368848808,
+            -33.32922415568381
+          ]
+        }
+      },
+      {
+        "type": "Feature",
+        "properties": { "population": 67 },
+        "geometry": {
+          "type": "Point",
+          "coordinates": [
+            -70.71548337697615,
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+      {
+        "type": "Feature",
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+        "geometry": {
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+      {
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+        "geometry": {
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+            -70.71548337697615,
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+      {
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+        "geometry": {
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+        "geometry": {
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+      {
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+        "geometry": {
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+      {
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+        "geometry": {
+          "type": "Point",
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+            -33.553984
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+      {
+        "type": "Feature",
+        "properties": { "population": 0 },
+        "geometry": {
+          "type": "Point",
+          "coordinates": [
+            -70.66154306546423,
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+      },
+      {
+        "type": "Feature",
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+        "geometry": {
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+      {
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+        "geometry": {
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+        "geometry": {
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+          "coordinates": [
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+        "geometry": {
+          "type": "Point",
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+        "geometry": {
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+        "geometry": {
+          "type": "Point",
+          "coordinates": [
+            -70.49972213092846,
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+      {
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+        "geometry": {
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+      {
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+      {
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+        "geometry": {
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+          "coordinates": [
+            -70.49972213092846,
+            -33.32922415568381
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+        }
+      }
+    ]
+  }
diff --git a/packages/turf-isolines/test/out/bigMatrix.geojson b/packages/turf-isolines/test/out/bigMatrix.geojson
new file mode 100644
index 0000000000..1c6ac230ca
--- /dev/null
+++ b/packages/turf-isolines/test/out/bigMatrix.geojson
@@ -0,0 +1,3611 @@
+{
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+	"features": [
+		{
+			"type": "Feature",
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diff --git a/packages/turf-isolines/test/out/matrix1.geojson b/packages/turf-isolines/test/out/matrix1.geojson
new file mode 100644
index 0000000000..c7d86afdd1
--- /dev/null
+++ b/packages/turf-isolines/test/out/matrix1.geojson
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diff --git a/packages/turf-isolines/test/out/matrix2.geojson b/packages/turf-isolines/test/out/matrix2.geojson
new file mode 100644
index 0000000000..5960c0cb6f
--- /dev/null
+++ b/packages/turf-isolines/test/out/matrix2.geojson
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diff --git a/packages/turf-isolines/test/out/pointGrid.geojson b/packages/turf-isolines/test/out/pointGrid.geojson
new file mode 100644
index 0000000000..469c7b1849
--- /dev/null
+++ b/packages/turf-isolines/test/out/pointGrid.geojson
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+							-33.37417612454705
+						],
+						[
+							-70.66154306546423,
+							-33.36979056660917
+						],
+						[
+							-70.6076027539523,
+							-33.36718359605721
+						],
+						[
+							-70.55366244244038,
+							-33.368626498761465
+						],
+						[
+							-70.54760173328174,
+							-33.37417612454705
+						],
+						[
+							-70.55366244244038,
+							-33.39215691209235
+						],
+						[
+							-70.58156260356724,
+							-33.419128093410286
+						],
+						[
+							-70.6076027539523,
+							-33.427196395513946
+						]
+					],
+					[
+						[
+							-70.78936800534963,
+							-33.32922415568381
+						],
+						[
+							-70.823364,
+							-33.3632786775499
+						]
+					]
+				]
+			}
+		},
+		{
+			"type": "Feature",
+			"properties": {
+				"population": 160
+			},
+			"geometry": {
+				"type": "MultiLineString",
+				"coordinates": []
+			}
+		},
+		{
+			"type": "Feature",
+			"properties": {
+				"stroke": "#F00",
+				"stroke-width": 1
+			},
+			"geometry": {
+				"type": "LineString",
+				"coordinates": [
+					[
+						-70.823364,
+						-33.553984
+					],
+					[
+						-70.49972213092846,
+						-33.553984
+					],
+					[
+						-70.49972213092846,
+						-33.32922415568381
+					],
+					[
+						-70.823364,
+						-33.32922415568381
+					],
+					[
+						-70.823364,
+						-33.553984
+					]
+				]
+			}
+		}
+	]
+}
diff --git a/packages/turf-isolines/types.ts b/packages/turf-isolines/types.ts
new file mode 100644
index 0000000000..beeea8d2e7
--- /dev/null
+++ b/packages/turf-isolines/types.ts
@@ -0,0 +1,16 @@
+import * as random from '@turf/random'
+import * as isolines from './'
+
+const points = random('point', 100, {
+    bbox: [0, 30, 20, 50]
+})
+for (let i = 0; i < points.features.length; i++) {
+    points.features[i].properties.z = Math.random() * 10;
+}
+const breaks = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
+const lines = isolines(points, breaks, 'temperature')
+const properties = {apply: 'all'}
+
+// Properties option
+isolines(points, breaks, 'temperature', properties)
+isolines(points, breaks, 'temperature', properties, [{name: 'break1'}, {name: 'break2'}])
diff --git a/packages/turf-isolines/yarn.lock b/packages/turf-isolines/yarn.lock
index fbf6c072af..9f80b12e00 100644
--- a/packages/turf-isolines/yarn.lock
+++ b/packages/turf-isolines/yarn.lock
@@ -2,10 +2,98 @@
 # yarn lockfile v1
 
 
+"@turf/bbox-polygon@^4.4.0":
+  version "4.4.0"
+  resolved "https://registry.yarnpkg.com/@turf/bbox-polygon/-/bbox-polygon-4.4.0.tgz#40b17ed063f0722e7407dcd6fad03bfce57b5a15"
+  dependencies:
+    "@turf/helpers" "^4.4.0"
+
+"@turf/bbox@^3.13.0", "@turf/bbox@^3.14.0":
+  version "3.14.0"
+  resolved "https://registry.yarnpkg.com/@turf/bbox/-/bbox-3.14.0.tgz#cee5f396dde78aca9cede05e1122db18bc504635"
+  dependencies:
+    "@turf/meta" "^3.14.0"
+
+"@turf/bbox@^4.4.0":
+  version "4.4.0"
+  resolved "https://registry.yarnpkg.com/@turf/bbox/-/bbox-4.4.0.tgz#3149458eb41404427cf786a90fb3680a0e8aab55"
+  dependencies:
+    "@turf/meta" "^4.4.0"
+
+"@turf/center@^3.13.0":
+  version "3.14.0"
+  resolved "https://registry.yarnpkg.com/@turf/center/-/center-3.14.0.tgz#1083aca4f137d3c4988955740c7d440c45cc9ecc"
+  dependencies:
+    "@turf/bbox" "^3.14.0"
+    "@turf/helpers" "^3.13.0"
+
+"@turf/distance@^3.14.0":
+  version "3.14.0"
+  resolved "https://registry.yarnpkg.com/@turf/distance/-/distance-3.14.0.tgz#71b0c6f265d23bb3004198e6da32f82964f42f8b"
+  dependencies:
+    "@turf/helpers" "^3.13.0"
+    "@turf/invariant" "^3.13.0"
+
+"@turf/envelope@^4.4.0":
+  version "4.4.0"
+  resolved "https://registry.yarnpkg.com/@turf/envelope/-/envelope-4.4.0.tgz#e008e4e73a79054ea0824c54a2a34c529d42c1f1"
+  dependencies:
+    "@turf/bbox" "^4.4.0"
+    "@turf/bbox-polygon" "^4.4.0"
+
+"@turf/helpers@4.1.0":
+  version "4.1.0"
+  resolved "https://registry.yarnpkg.com/@turf/helpers/-/helpers-4.1.0.tgz#013a9c53db6a9386e47c7ab445d93ca2035c4b81"
+
+"@turf/helpers@^3.13.0":
+  version "3.13.0"
+  resolved "https://registry.yarnpkg.com/@turf/helpers/-/helpers-3.13.0.tgz#d06078a1464cf56cdb7ea624ea1e13a71b88b806"
+
+"@turf/helpers@^4.1.0", "@turf/helpers@^4.4.0":
+  version "4.4.0"
+  resolved "https://registry.yarnpkg.com/@turf/helpers/-/helpers-4.4.0.tgz#c83112f7fbe6ed183c7c0c2f776481b94d1cbd01"
+
+"@turf/invariant@^3.13.0":
+  version "3.13.0"
+  resolved "https://registry.yarnpkg.com/@turf/invariant/-/invariant-3.13.0.tgz#89243308cd563206e81e5c6162e0d22f61822f90"
+
+"@turf/invariant@^4.1.0", "@turf/invariant@^4.4.0":
+  version "4.4.0"
+  resolved "https://registry.yarnpkg.com/@turf/invariant/-/invariant-4.4.0.tgz#aac0afb840ae40908f9c80393f416222dcf79c32"
+
+"@turf/meta@^3.14.0":
+  version "3.14.0"
+  resolved "https://registry.yarnpkg.com/@turf/meta/-/meta-3.14.0.tgz#8d3050c1a0f44bf406a633b6bd28c510f7bcee27"
+
+"@turf/meta@^4.1.0", "@turf/meta@^4.4.0":
+  version "4.4.0"
+  resolved "https://registry.yarnpkg.com/@turf/meta/-/meta-4.4.0.tgz#4fa25d4cc0525bd4cdbaf4ff68a6f8ae81f1975f"
+
+"@turf/point-grid@^3.14.0":
+  version "3.14.0"
+  resolved "https://registry.yarnpkg.com/@turf/point-grid/-/point-grid-3.14.0.tgz#321af655a5093a1b5e76a4cc34c0205aaccc1533"
+  dependencies:
+    "@turf/bbox" "^3.14.0"
+    "@turf/distance" "^3.14.0"
+    "@turf/helpers" "^3.13.0"
+
+"@turf/random@^3.13.0":
+  version "3.14.0"
+  resolved "https://registry.yarnpkg.com/@turf/random/-/random-3.14.0.tgz#ea1fa68321b8ff1873bf6f9a2d4f3f6bd7aba163"
+  dependencies:
+    geojson-random "^0.2.2"
+
 balanced-match@^0.4.1:
   version "0.4.2"
   resolved "https://registry.yarnpkg.com/balanced-match/-/balanced-match-0.4.2.tgz#cb3f3e3c732dc0f01ee70b403f302e61d7709838"
 
+bbox-dateline@^1.1.1:
+  version "1.2.1"
+  resolved "https://registry.yarnpkg.com/bbox-dateline/-/bbox-dateline-1.2.1.tgz#4bd2e4ea928f90406b0882d4504e956bc7fb094c"
+  dependencies:
+    "@turf/bbox" "^3.13.0"
+    "@turf/center" "^3.13.0"
+
 benchmark@^2.1.4:
   version "2.1.4"
   resolved "https://registry.yarnpkg.com/benchmark/-/benchmark-2.1.4.tgz#09f3de31c916425d498cc2ee565a0ebf3c2a5629"
@@ -39,6 +127,16 @@ defined@~1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/defined/-/defined-1.0.0.tgz#c98d9bcef75674188e110969151199e39b1fa693"
 
+detect-indent@^5.0.0:
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/detect-indent/-/detect-indent-5.0.0.tgz#3871cc0a6a002e8c3e5b3cf7f336264675f06b9d"
+
+error-ex@^1.2.0:
+  version "1.3.1"
+  resolved "https://registry.yarnpkg.com/error-ex/-/error-ex-1.3.1.tgz#f855a86ce61adc4e8621c3cda21e7a7612c3a8dc"
+  dependencies:
+    is-arrayish "^0.2.1"
+
 es-abstract@^1.5.0:
   version "1.7.0"
   resolved "https://registry.yarnpkg.com/es-abstract/-/es-abstract-1.7.0.tgz#dfade774e01bfcd97f96180298c449c8623fb94c"
@@ -74,6 +172,10 @@ function-bind@^1.0.2, function-bind@^1.1.0, function-bind@~1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/function-bind/-/function-bind-1.1.0.tgz#16176714c801798e4e8f2cf7f7529467bb4a5771"
 
+geojson-random@^0.2.2:
+  version "0.2.2"
+  resolved "https://registry.yarnpkg.com/geojson-random/-/geojson-random-0.2.2.tgz#ab4838f126adc5e16f8f94e655def820f9119dbc"
+
 glob@~7.1.1:
   version "7.1.2"
   resolved "https://registry.yarnpkg.com/glob/-/glob-7.1.2.tgz#c19c9df9a028702d678612384a6552404c636d15"
@@ -85,12 +187,34 @@ glob@~7.1.1:
     once "^1.3.0"
     path-is-absolute "^1.0.0"
 
+global-mercator@2.7.0:
+  version "2.7.0"
+  resolved "https://registry.yarnpkg.com/global-mercator/-/global-mercator-2.7.0.tgz#72975ed01b25d2f43d88f73468e1a9aee7685207"
+  dependencies:
+    bbox-dateline "^1.1.1"
+
+graceful-fs@^4.1.11, graceful-fs@^4.1.2:
+  version "4.1.11"
+  resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.1.11.tgz#0e8bdfe4d1ddb8854d64e04ea7c00e2a026e5658"
+
+grid-to-matrix@^1.2.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/grid-to-matrix/-/grid-to-matrix-1.2.0.tgz#b016df4d76f996e6b74663eab9ceb913546657e9"
+  dependencies:
+    "@turf/helpers" "^4.1.0"
+    "@turf/invariant" "^4.1.0"
+    "@turf/meta" "^4.1.0"
+
 has@^1.0.1, has@~1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/has/-/has-1.0.1.tgz#8461733f538b0837c9361e39a9ab9e9704dc2f28"
   dependencies:
     function-bind "^1.0.2"
 
+imurmurhash@^0.1.4:
+  version "0.1.4"
+  resolved "https://registry.yarnpkg.com/imurmurhash/-/imurmurhash-0.1.4.tgz#9218b9b2b928a238b13dc4fb6b6d576f231453ea"
+
 inflight@^1.0.4:
   version "1.0.6"
   resolved "https://registry.yarnpkg.com/inflight/-/inflight-1.0.6.tgz#49bd6331d7d02d0c09bc910a1075ba8165b56df9"
@@ -102,6 +226,10 @@ inherits@2, inherits@~2.0.3:
   version "2.0.3"
   resolved "https://registry.yarnpkg.com/inherits/-/inherits-2.0.3.tgz#633c2c83e3da42a502f52466022480f4208261de"
 
+is-arrayish@^0.2.1:
+  version "0.2.1"
+  resolved "https://registry.yarnpkg.com/is-arrayish/-/is-arrayish-0.2.1.tgz#77c99840527aa8ecb1a8ba697b80645a7a926a9d"
+
 is-callable@^1.1.1, is-callable@^1.1.3:
   version "1.1.3"
   resolved "https://registry.yarnpkg.com/is-callable/-/is-callable-1.1.3.tgz#86eb75392805ddc33af71c92a0eedf74ee7604b2"
@@ -114,6 +242,10 @@ is-function@~1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/is-function/-/is-function-1.0.1.tgz#12cfb98b65b57dd3d193a3121f5f6e2f437602b5"
 
+is-plain-obj@^1.0.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/is-plain-obj/-/is-plain-obj-1.1.0.tgz#71a50c8429dfca773c92a390a4a03b39fcd51d3e"
+
 is-regex@^1.0.3:
   version "1.0.4"
   resolved "https://registry.yarnpkg.com/is-regex/-/is-regex-1.0.4.tgz#5517489b547091b0930e095654ced25ee97e9491"
@@ -124,10 +256,36 @@ is-symbol@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/is-symbol/-/is-symbol-1.0.1.tgz#3cc59f00025194b6ab2e38dbae6689256b660572"
 
+load-json-file@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/load-json-file/-/load-json-file-2.0.0.tgz#7947e42149af80d696cbf797bcaabcfe1fe29ca8"
+  dependencies:
+    graceful-fs "^4.1.2"
+    parse-json "^2.2.0"
+    pify "^2.0.0"
+    strip-bom "^3.0.0"
+
 lodash@^4.17.4:
   version "4.17.4"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.4.tgz#78203a4d1c328ae1d86dca6460e369b57f4055ae"
 
+make-dir@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/make-dir/-/make-dir-1.0.0.tgz#97a011751e91dd87cfadef58832ebb04936de978"
+  dependencies:
+    pify "^2.3.0"
+
+marchingsquares@^1.2.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/marchingsquares/-/marchingsquares-1.2.0.tgz#36ae2dcc170be576d42579aac3c46da89ab650e6"
+
+matrix-to-grid@3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/matrix-to-grid/-/matrix-to-grid-3.0.0.tgz#7854792a0a439a5155bd0701e05daa745fe3dcbb"
+  dependencies:
+    "@turf/helpers" "4.1.0"
+    global-mercator "2.7.0"
+
 minimatch@^3.0.4:
   version "3.0.4"
   resolved "https://registry.yarnpkg.com/minimatch/-/minimatch-3.0.4.tgz#5166e286457f03306064be5497e8dbb0c3d32083"
@@ -152,10 +310,20 @@ once@^1.3.0:
   dependencies:
     wrappy "1"
 
+parse-json@^2.2.0:
+  version "2.2.0"
+  resolved "https://registry.yarnpkg.com/parse-json/-/parse-json-2.2.0.tgz#f480f40434ef80741f8469099f8dea18f55a4dc9"
+  dependencies:
+    error-ex "^1.2.0"
+
 path-is-absolute@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/path-is-absolute/-/path-is-absolute-1.0.1.tgz#174b9268735534ffbc7ace6bf53a5a9e1b5c5f5f"
 
+pify@^2.0.0, pify@^2.3.0:
+  version "2.3.0"
+  resolved "https://registry.yarnpkg.com/pify/-/pify-2.3.0.tgz#ed141a6ac043a849ea588498e7dca8b15330e90c"
+
 platform@^1.3.3:
   version "1.3.4"
   resolved "https://registry.yarnpkg.com/platform/-/platform-1.3.4.tgz#6f0fb17edaaa48f21442b3a975c063130f1c3ebd"
@@ -170,6 +338,16 @@ resumer@~0.0.0:
   dependencies:
     through "~2.3.4"
 
+slide@^1.1.5:
+  version "1.1.6"
+  resolved "https://registry.yarnpkg.com/slide/-/slide-1.1.6.tgz#56eb027d65b4d2dce6cb2e2d32c4d4afc9e1d707"
+
+sort-keys@^1.1.1:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/sort-keys/-/sort-keys-1.1.2.tgz#441b6d4d346798f1b4e49e8920adfba0e543f9ad"
+  dependencies:
+    is-plain-obj "^1.0.0"
+
 string.prototype.trim@~1.1.2:
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/string.prototype.trim/-/string.prototype.trim-1.1.2.tgz#d04de2c89e137f4d7d206f086b5ed2fae6be8cea"
@@ -178,6 +356,10 @@ string.prototype.trim@~1.1.2:
     es-abstract "^1.5.0"
     function-bind "^1.0.2"
 
+strip-bom@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/strip-bom/-/strip-bom-3.0.0.tgz#2334c18e9c759f7bdd56fdef7e9ae3d588e68ed3"
+
 tape@^4.6.3:
   version "4.6.3"
   resolved "https://registry.yarnpkg.com/tape/-/tape-4.6.3.tgz#637e77581e9ab2ce17577e9bd4ce4f575806d8b6"
@@ -203,3 +385,22 @@ through@~2.3.4, through@~2.3.8:
 wrappy@1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/wrappy/-/wrappy-1.0.2.tgz#b5243d8f3ec1aa35f1364605bc0d1036e30ab69f"
+
+write-file-atomic@^2.0.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/write-file-atomic/-/write-file-atomic-2.1.0.tgz#1769f4b551eedce419f0505deae2e26763542d37"
+  dependencies:
+    graceful-fs "^4.1.11"
+    imurmurhash "^0.1.4"
+    slide "^1.1.5"
+
+write-json-file@^2.0.0:
+  version "2.2.0"
+  resolved "https://registry.yarnpkg.com/write-json-file/-/write-json-file-2.2.0.tgz#51862506bbb3b619eefab7859f1fd6c6d0530876"
+  dependencies:
+    detect-indent "^5.0.0"
+    graceful-fs "^4.1.2"
+    make-dir "^1.0.0"
+    pify "^2.0.0"
+    sort-keys "^1.1.1"
+    write-file-atomic "^2.0.0"