Reading grids through GDAL may have too large errors in limits

[joa-quim]

Notice how limits slightly wrong, but enough to triggers because lat min is -90.

C:\Users\j\Downloads>grdinfo AQUA_MODIS.20250901_20250930.L3m.MO.NSST.sst.4km.nc
AQUA_MODIS.20250901_20250930.L3m.MO.NSST.sst.4km.nc: Title: MODISA Level-3 Standard Mapped Image
AQUA_MODIS.20250901_20250930.L3m.MO.NSST.sst.4km.nc: Command: l3mapgen par=AQUA_MODIS.20250901_20250930.L3m.MO.NSST.sst.4km.nc.param
AQUA_MODIS.20250901_20250930.L3m.MO.NSST.sst.4km.nc: Remark:
AQUA_MODIS.20250901_20250930.L3m.MO.NSST.sst.4km.nc: Pixel node registration used [Cartesian grid]
AQUA_MODIS.20250901_20250930.L3m.MO.NSST.sst.4km.nc: Grid file format: ns = GMT netCDF format (16-bit integer), CF-1.7
AQUA_MODIS.20250901_20250930.L3m.MO.NSST.sst.4km.nc: x_min: -180.000007629 x_max: 180.000007629 x_inc: 0.0416666684327 name: Longitude n_columns: 8640
AQUA_MODIS.20250901_20250930.L3m.MO.NSST.sst.4km.nc: y_min: -90.0000038147 y_max: 89.9999961853 y_inc: 0.0416666666667 name: Latitude n_rows: 4320
AQUA_MODIS.20250901_20250930.L3m.MO.NSST.sst.4km.nc: v_min: -0.449999989942 v_max: 0.449999989942 name: Sea Surface Temperature [degree_C]
AQUA_MODIS.20250901_20250930.L3m.MO.NSST.sst.4km.nc: scale_factor: 0.00499999988824 add_offset: 0 packed z-range: [-90,90]
AQUA_MODIS.20250901_20250930.L3m.MO.NSST.sst.4km.nc: format: netCDF-4 chunk_size: 512,1024 shuffle: on deflation_level: 4
AQUA_MODIS.20250901_20250930.L3m.MO.NSST.sst.4km.nc: Default CPT:

[joa-quim]

This may very well not be a GMT's fault but it has to catch this and fix it.

[joa-quim]

Yes, error is in the file's coordinates. Now I remember this isn't first time we cross this problem. NASA simply ships data with wrong coordinates. Errors are small and probably originated on a Flota32 _vs_Float64 issue, but they are enough to make latitudes be < -90 degrees and hence not pass checks of global projections that verify data validity.
Should be fixed by PR #8935

[joa-quim]

BTW, GDAL reports the same wrong coordinates

gdalinfo NETCDF:"C:\Users\j\Downloads\TERRA_MODIS.20250901_20250930.L3m.MO.NSST.sst.4km.nc":sst
...

Corner Coordinates:
Upper Left  (-180.0000051,  89.9999975)
Lower Left  (-180.0000051, -90.0000051)
Upper Right ( 180.0000051,  89.9999975)
Lower Right ( 180.0000051, -90.0000051)