Add geoid for Caribbean Netherlands (Bonaire)

[Jochem-L]

No description provided.

[rouault]

There are also other files to update as detailed in /~https://github.com/OSGeo/PROJ-data/blob/master/CONTRIBUTING.md
Cf /~https://github.com/OSGeo/PROJ-data/pull/114/files as an example that should be close to what you need to do

[Jochem-L]

@rouault Thanks for pointing to CONTRIBUTING.md! I should have read that much earlier.

Only now I notice we created a consistency problem. We published the geoid grid for Bonaire as bq_nsgi_bongeo2004.tif However, CONTRIBUTING.md mentions that the two-letter country code refers to the agency nationality, not the country code of the area the grid is intended for. So we should have used the country code nl instead of bq? I checked some other countries with overseas parts that have their own country codes, and indeed grids for these overseas parts are in the same directory as the grids for the mainland.

Shall we rename the geoid grid file to nl_nsgi_bongeo2004.tif and put it in the directory nl_nsgi? In that case this pull request for bq_nsgi_bongeo2004.tif in the directory bq_nsgi should not be merged...

[rouault]

Shall we rename the geoid grid file to nl_nsgi_bongeo2004.tif and put it in the directory nl_nsgi? I

yes that would be more consistent

In that case this pull request for bq_nsgi_bongeo2004.tif in the directory bq_nsgi should not be merged...

your choice if you want to amend it, or re-open a fresh one.