Colours are the deeds of light; its deeds and sufferings: thus considered we may expect from them some explanation respecting light itself.
DESCRIPTION
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.
OPTIONS
--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 ofplain
,xml
orjson
. -h
,--help
-
Brief help.
--hinge-active
-
If the input cpt has a
SOFT_HINGE
directive, then activate that hinge (resulting in independent scaling of the two halves of the gradient either side of the hinge).If the input does not have such a directive, then this option has no effect.
-o
,--output
path
-
Write the output to
path
, rather thanstdout
. -p
,--percentage
-
Convert (z) values to percentages.
-v
,--verbose
-
Verbose operation.
-V
,--version
-
Version information.