This is because in some cases records for the same observation well
exist with different statuscodes.

Accomplished by filtering for specific value of fields 'PeilpuntOpenbaarheidTypeCode' and 'PeilpuntOpenbaarheidCode'

This provides 4 approaches to aggregate obswell attributes to the location level, as discussed with @w-jan.
See function documentation.

Note: the use of window functions with dbplyr 1.4.2 generated a warning (here caused by row_number()), as
discussed and solved in tidyverse/dbplyr#328 (merged to dbplyr master).
As the fixed dbplyr master is currently not released, and watina depended on an (older) dbplyr fork with pivot_wider,
a merge between both is now required.
It is provided by https:/florisvdh/dbplyr/tree/dbplyr_with_pivot_wider

- measure filterdepth by the top of the filter
- (re)arrange obswells by area_code and loc_code

filterdepth was originally calculated using the filter bottom,
then it was altered (@w-jan) to use the filter top,
but eventually we settle using the middle of the filter (well screen).