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cptpg - Man Page

convert GMT colour palette tables (cpt) to PostGIS colour-maps.


cptpg [-h] [-o file] [-p] [-v] [-V] [file]


The cptpg utility converts the colour palette table (cpt) files used by GMT(1) to the colour-maps used by PostGIS, in particular those for the ST_ColorMap function. It should also be possible to use the maps in the GDAL program gdaldem, the GRASS r.colors utility and in ESRI products which call for a HDR color table.

The program will read from stdin if a file is not specified as the final argument, and write to stdout if the -o option is not specified.


--backtrace-file path

Specify a file to which to write a formatted backtrace. The file will only be created if there is a backtrace created, typically when an error occurs.

--backtrace-format format

Specify the format of the backtrace written to the files specified by --backtrace-file, one of plain, xml or json.

-h,  --help

Brief help.

-o,  --output file

Write the output to file, rather than stdout.

-p,  --percentage

Convert (z) values to percentages.

-v,  --verbose

Verbose operation.

-V,  --version

Version information.


J.J. Green

See Also



6 September 2023 cptutils 1.77 User commands