Closed rouault closed 4 years ago
@kbevers @hobu Does that look good to you ? After doing that, I realized that https://download.osgeo.org/proj/vdatum/ had .zip with previous grids. The names betwen those .zip and this pull requests are not always the same:
It looks good to me. I haven't tested any of the grids but I trust that you have converted them correctly.
I haven't tested any of the grids but I trust that you have converted them correctly.
I trust the GDAL NGSGEOID driver that has been used recently to do the job Also cross-checking on a random point among the various GEOID realizations and egm96_15.gtx shows consistency
For CONUS
$ gdallocationinfo -wgs84 ../egm96_15.gtx -77 40
Report:
Location: (412P,200L)
Band 1:
Value: -34.5047569274902
$ gdallocationinfo -wgs84 g1999u03.gtx 283 40
Report:
Location: (1140P,1080L)
Band 1:
Value: -33.820499420166
$ gdallocationinfo -wgs84 geoid03_conus.gtx 283 40
Report:
Location: (3180P,1080L)
Band 1:
Value: -33.8349685668945
$ gdallocationinfo -wgs84 geoid09_conus.gtx 283 40
Report:
Location: (3180P,1080L)
Band 1:
Value: -33.8376998901367
$ gdallocationinfo -wgs84 g2012bu0.gtx 283 40
Report:
Location: (3180P,1080L)
Band 1:
Value: -33.8595008850098
$ gdallocationinfo -wgs84 g2018u0.gtx 283 40
Report:
Location: (3180P,1080L)
Band 1:
Value: -33.880199432373
Alaska
$ gdallocationinfo -wgs84 ../egm96_15.gtx 175 65
Report:
Location: (1420P,100L)
Band 1:
Value: 6.03143215179443
$ gdallocationinfo -wgs84 g1999a01.gtx 175 65
Report:
Location: (180P,420L)
Band 1:
Value: 6.23759984970093
$ gdallocationinfo -wgs84 g2003a01.gtx 175 65
Report:
Location: (180P,420L)
Band 1:
Value: 5.28455686569214
$ gdallocationinfo -wgs84 geoid06_ak.gtx 175 65
Report:
Location: (180P,420L)
Band 1:
Value: 3.61653804779053
$ gdallocationinfo -wgs84 geoid09_ak.gtx 175 65
Report:
Location: (180P,420L)
Band 1:
Value: 4.35279989242554
$ gdallocationinfo -wgs84 g2012ba0.gtx 175 65
Report:
Location: (180P,420L)
Band 1:
Value: 4.43069982528687
All of them are referenced, at least partially, by EPSG and/or LIDAR WKT1 CompoundCRS