Digital elevation model (100 m global)

This repository contains code to generate a global digital elevation model (based on Robinson et al. 2014). Specifically, elevation data are downloaded from the EarthEnv project. Next, the data are combined into a single raster (GeoTIFF) file containing the elevation data (90 m resolution; EPSG:4326 coordinate reference system). Finally, the data are projected to the World Behrmann coordinate reference system using (100 m resolution; ESRI:4326 coordinate reference system). A processed version of the data can be downloaded from the Zenodo Digital Repository. All credit should go to Robinson et al. (2014), please cite their work if you use this dataset.

Metadata

The raster (GeoTIFF) file is dem-100m-esri54017.tif (see below for details).

Driver: GTiff/GeoTIFF
Files: dem-100m-esri54017.tif
Size is 347351, 132926
Coordinate System is:
PROJCRS["World_Behrmann",
    BASEGEOGCRS["WGS 84",
        DATUM["World Geodetic System 1984",
            ELLIPSOID["WGS 84",6378137,298.257223563,
                LENGTHUNIT["metre",1]]],
        PRIMEM["Greenwich",0,
            ANGLEUNIT["degree",0.0174532925199433]],
        ID["EPSG",4326]],
    CONVERSION["Lambert Cylindrical Equal Area",
        METHOD["Lambert Cylindrical Equal Area",
            ID["EPSG",9835]],
        PARAMETER["Latitude of 1st standard parallel",30,
            ANGLEUNIT["degree",0.0174532925199433],
            ID["EPSG",8823]],
        PARAMETER["Longitude of natural origin",0,
            ANGLEUNIT["degree",0.0174532925199433],
            ID["EPSG",8802]],
        PARAMETER["False easting",0,
            LENGTHUNIT["metre",1],
            ID["EPSG",8806]],
        PARAMETER["False northing",0,
            LENGTHUNIT["metre",1],
            ID["EPSG",8807]]],
    CS[Cartesian,2],
        AXIS["easting",east,
            ORDER[1],
            LENGTHUNIT["metre",1,
                ID["EPSG",9001]]],
        AXIS["northing",north,
            ORDER[2],
            LENGTHUNIT["metre",1,
                ID["EPSG",9001]]]]
Data axis to CRS axis mapping: 1,2
Origin = (-17367531.000000000000000,7287077.000000000000000)
Pixel Size = (100.000000000000000,-100.000000000000000)
Metadata:
  AREA_OR_POINT=Area
Image Structure Metadata:
  COMPRESSION=DEFLATE
  INTERLEAVE=BAND
Corner Coordinates:
Upper Left  (-17367531.000, 7287077.000) (179d59'59.98"E, 83d 0'14.04"N)
Lower Left  (-17367531.000,-6005523.000) (179d59'59.98"E, 55d 0' 0.03"S)
Upper Right (17367569.000, 7287077.000) (179d59'58.56"W, 83d 0'14.04"N)
Lower Right (17367569.000,-6005523.000) (179d59'58.56"W, 55d 0' 0.03"S)
Center      (      19.000,  640777.000) (  0d 0' 0.71"E,  5d 1'44.75"N)
Band 1 Block=256x256 Type=Int16, ColorInterp=Gray

Usage

You can run the code to produce the dataset using the system command make clean all. After processing has successfully completed, the code will produce a raster (GeoTIFF) file named dem-100m-esri54017.tif in the results directory.

Software requirements

Operating system

• Ubuntu (21.10) (300 Gb disk space available)

Software

• GNU make (version 4.1)
• GDAL (version 3.2.2)
• R (version 4.1.1)

System packages

• gdal-bin
• libudunits2-dev
• libgdal-dev
• libgeos-dev
• libproj-dev
• libxml2-dev
• libssl-dev

Citation

This dataset was derived from Robinson et al. (2014). If you use this dataset, you should cite their work - they deserve all the credit!

Robinson N, Regetz J, & Guralnick RP (2014) EarthEnv-DEM90: A nearly-global, void-free, multi-scale smoothed, 90m digital elevation model from fused ASTER and SRTM data. ISPRS Journal of Photogrammetry and Remote Sensing, 87: 57–67.