d.legend: option to get info from stdin instead of raster

[hamish]

this was code wish # 391 over on the old gforge tracker. moving it here. ​http://wald.intevation.org/tracker/index.php?func=detail&aid=391&group_id=21&atid=188

Hamish

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Hi,

It would be nice if d.legend could look for "map=-" and if so take legend cat and color info from stdin. That way vector maps and custom legends could be made without resorting to tricks like making a dummy raster file to hold that info. [see v.colors addon script]

If data is fed from stdin (signaled by map=-) create categorical legend using that data. Data format: "cat|label|color"

e.g.

d.legend -m map="-" <<EOF
1|Main Street|255:0:0
2|Elm Street|0:255:0
3|Old Coach Road|0:0:255
EOF

In this way d.legend could work as a system module by the GUI instead of a user module, and be useful for non-raster tasks too.

see expanded thread on the -dev mailing list:

​http://thread.gmane.org/gmane.comp.gis.grass.devel/19852/focus=19952

Hamish

[wenzeslaus]

This would be similar to what G7:d.legend.vect supports (input option).