Yes. there is no point in using Z coordinate if the input is 2D. However, in the current GRASS 7, even if the input is 2D, if -z flag is not used, v.surf.rst does not work.<br><br><div class="gmail_quote">On Wed, Jan 16, 2013 at 4:24 PM, Martin Landa <span dir="ltr"><<a href="mailto:landa.martin@gmail.com" target="_blank">landa.martin@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi,<br>
<br>
2013/1/16 Markus Metz <<a href="mailto:markus.metz.giswork@gmail.com">markus.metz.giswork@gmail.com</a>>:<br>
<div class="im">> If you want to use elevation values from zcolumn, you should not use<br>
> the -z flag. Try instead<br>
> v.surf.rst input=isoline@TOPOIKDATA zcolumn=height elev=elev_1m<br>
<br>
</div>I was thinking to omit such -z flags in G7.<br>
<br>
* if zcolumn is given, use values from this column<br>
* if zcolumn is *not* given use z coordinates (if vector is 2D, print error).<br>
<br>
What do you think? Something similar was done for v.out.ogr (-z -><br>
!-2) some weeks ago. Motto would be: to use z coordinates if the map<br>
is 3D and the user didn't enter an option or flag which forces to use<br>
values from attribute table.<br>
<span class="HOEnZb"><font color="#888888"><br>
Martin<br>
<br>
--<br>
Martin Landa <landa.martin <a href="http://gmail.com" target="_blank">gmail.com</a>> * <a href="http://geo.fsv.cvut.cz/~landa" target="_blank">http://geo.fsv.cvut.cz/~landa</a><br>
</font></span></blockquote></div><br>