Colours are the deeds of light; its deeds and sufferings: thus considered we may expect from them some explanation respecting light itself.
The cptpg utility converts the colour palette
table (cpt) files used by GMT(1) to the colour-maps used by PostGIS, in particular those
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
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.
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.
formatof the backtrace written to the files specified by
--backtrace-file, one of
Write the output to
file, rather than
Convert (z) values to percentages.