[GRASS5] Re: grass5.1 quest

[Radim Blazek]

> I compiled grass5.1 today...and absolutely love the new features that
> have been added...I played around with the sample data set that came
> with it...wonderful stuff...
> question, is there any documentation for creating a 3d vector??  Or how
> was that done??  This feature could not have come at a better time, and
> I would like to try it out for displaying a barrier... is there a quick
> and dirty way to make one??
> Thanks!!

There is no documentation. All 3D vectors were generated from ascii files,
z is third coordinate. You can look into:
g51test/PERMANENT/tin
g51test/dem

Example of vector ascii line record:
L 2
 -7409 -150 161
 -7409 -150 169
(i.e. y x z)

Import of 3d ascii:
v.in.ascii -z input=tin output=tin 

(Warning: tin generated by 'dem' script is not correct, you can find 
in the script that z-coordinate is just read from raster surface and is not
calculated properly.)

Radim

> --
> LTJG Kevin Slover, NOAA
> GIS Specialist/Meteorologist/Oceanographer
> Tropical Prediction Center/Technical Support Branch
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