[GRASS5] [bug #4323] (grass) gis.m: intelligent defaults for d.rast.arrow

Request Tracker grass-bugs at intevation.de
Sat Apr 22 10:04:02 EDT 2006

this bug's URL: http://intevation.de/rt/webrt?serial_num=4323

Subject: gis.m: intelligent defaults for d.rast.arrow


The new gis.m makes it easy to use d.rast.arrow, but the defaults are all
wrong for the typical gis.m experience.


calculate the canvas size in pixels as well as the region size, then calculate
what gives you an arrow every 8-12 pixels.

set the arrow scaling to about 2 times the grid spacing.

set the grid color to "none".

It will be nice for these things right out of the box whenever possible.

Is it possible? (then what happens on resizing monitor or zoom?)


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