Hi folks, I'm using GMT version 6.6.0 and GDAL version 3.12.4. I have several CPT files that I generated in GMT using the makecpt command, such as:
*gmt makecpt -T-120/120/10 -I -Crainbow -Z -Fr* which generates the attached file. Then, I am trying to apply that color palette to a TIFF file using 'gdal raster color'. The documentation <https://gdal.org/en/stable/programs/gdaldem.html> states that *GMT .cpt palette files are also supported (COLOR_MODEL = RGB only).* however, I continually get the error of *ERROR 1: No color association found in test.cpt* When I dug into the GDAL source code for the GMT CPT parser here <https://github.com/OSGeo/gdal/blob/b3f839f2515b023e4a7cf099b7ce1626ccb24eac/gcore/gdalcolortable.cpp#L744>, it really does not seem to match up with the current implementation of GMT CPT files, even though the GDAL feature was added in the latest release. For instance, it uses space, comma, tab, and colon as delimiters, but no matter what flags I use for my GMT CPT generation, I get a backslash as the delimiter, as seen in the attached file. There are other inconsistencies as well. Am I missing something? I'm somewhat new to GDAL and GMT, so I'd appreciate any advice. Also, if this feature really to read GMT CPT files is not adequate, is there a better way to approach this? I essentially want to colorize a .grd file using gdal, so that I can then generate map tiles with it. I have the rest of the pipeline figured out, but I'm having issues with the color mapping. I wrote my own converter from GMT CPT to GDAL color file, but it's a bit buggy/hacky. I'm wondering if there is a more 'official' way to do this. Thanks! Sean
test.cpt
Description: Binary data
_______________________________________________ gdal-dev mailing list [email protected] https://lists.osgeo.org/mailman/listinfo/gdal-dev
