As far as I am aware, the term "extrusion" is pretty well defined
as the operation of extending an object in 3D space by "pulling
it out" with a predefined bearing and length. This would convert a point
to a line, a line to a plane and a polygon to, well, a polygon with a
volume, I guess.
Personally, I'd be more in favour of wrapping a little script
"v.points.to.3d" around v.transform. For the beginners' sake.
Benjamin
Dylan Beaudette wrote:
On Saturday 01 March 2008 10:20:45 pm Hamish wrote:
Benjamin Ducke wrote:
That should work but it may not exactly be easy to locate for a
novice user.
How about a little wrapper script for v.transform that simplifies
this action?
I am increasingly concerned about the number of, sometimes basic,
geoprocessing functions that are present in GRASS but "hidden"
in complex module options. Of course people can always mail to
this list but in the first place it will create frustration for
them and possible turn them away.
So we make little wrapper scripts like v.dissolve and v.centroids.
That's much better than dealing with code duplication.
but that shouldn't wrap 3 module commands together with temporary maps
etc to perform something as simple as the 2d+attr column -> 3d points
conversion. If as Maciek suggests v.transform could do the job then
it's not so bad. The v.transform name even sounds right for the job.
Hamish
I agree that we should avoid code duplication at any cost, and v.transform
does the job. However, doesn't it make more sense to put that code (for
points) into v.extrude ? Or, is v.extrude primarily for areas by design?
Dylan
--
Benjamin Ducke, M.A.
Archäoinformatik
(Archaeoinformation Science)
Institut für Ur- und Frühgeschichte
(Inst. of Prehistoric and Historic Archaeology)
Christian-Albrechts-Universität zu Kiel
Johanna-Mestorf-Straße 2-6
D 24098 Kiel
Germany
Tel.: ++49 (0)431 880-3378 / -3379
Fax : ++49 (0)431 880-7300
www.uni-kiel.de/ufg
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