[GRASS-user] v.to.rast on 3D polygons?

[William Kyngesburye]

A bit stumped on this:

I imported a 3D polygon shapefile with v.in.ogr and the 3D (-z)  
option to generate a 3D area vector.  Without the 3D option, the  
polygon heights are dropped altogether, without adding them to the  
attribute table.

I now want to make a raster with area fills corresponding to the  
elevation (height) of the 3D polygons.  According to the v.to.rast  
docs, the use=z option only works for points and lines, and indeed  
all that gives me is single cells at the centroids.

As a workaround I thought I'd put the elevation into the db table  
with v.to.db, but there is no z option, just area and perimeter.

Any ideas how to get the 3D z value into a raster fill?

Is it possible to add a z option for v.to.rast (for areas) and/or  
v.to.db?

-----
William Kyngesburye <kyngchaos at kyngchaos.com>
http://www.kyngchaos.com/

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