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<DIV><FONT size=2>Hi Simon,</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>I didn't read the mail carefully :-)</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>>when I first load the layer it shows in the map display as
a single colour block</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>it's not a NVIZ problem, but a raster problem. Try to import
again with r.in.gdal or try with r.in.arc</FONT></DIV>
<DIV><FONT size=2>If not succesfull, try to download SRTM v3 data from </FONT><A
href="http://srtm.csi.cgiar.org/"><FONT
size=2>http://srtm.csi.cgiar.org/</FONT></A></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>Regards</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>Marco</FONT></DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=handymanorama@gmail.com href="mailto:handymanorama@gmail.com">Simon
Watkins</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=marco.pasetti@alice.it
href="mailto:marco.pasetti@alice.it">marco.pasetti@alice.it</A> ; <A
title=grass-windows@lists.osgeo.org
href="mailto:grass-windows@lists.osgeo.org">grass-windows@lists.osgeo.org</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, June 09, 2008 6:26 PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: R: [GRASS-windows] elevation
data error?</DIV>
<DIV><BR></DIV>Hi Marco,<BR><BR>Thanks for your very prompt reply. I
just tried that but no luck alas. It seems to me like this is being
treated as a 2D raster with no elevation data but I guess I don't really
know enough about formats and such yet. This is only a personal project,
with no real urgency about it so I'll just keep plugging away and hope I
figure it out.<BR><BR>Simon.<BR><BR>
<DIV class=gmail_quote>On Mon, Jun 9, 2008 at 9:36 AM, <<A
href="mailto:marco.pasetti@alice.it">marco.pasetti@alice.it</A>> wrote:<BR>
<BLOCKQUOTE class=gmail_quote
style="PADDING-LEFT: 1ex; MARGIN: 0pt 0pt 0pt 0.8ex; BORDER-LEFT: rgb(204,204,204) 1px solid">
<DIV>
<DIV dir=ltr>
<DIV dir=ltr><FONT face=Arial color=#000000 size=2>Hi Simon,</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2></FONT> </DIV>
<DIV dir=ltr><FONT face=Arial size=2>did you set the z-exag
parameter?</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2>Since lat/long data are in decimal
degrees while elevation is in meters, you must set the correct value for the
z-exag parameter.</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2>The transformation from decimal degrees
to meters is not univocal, because it depends on the geographic zone you're
working on, but we can assume a generic (mean)transformation value and set
the z-exag as follows:</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2></FONT> </DIV>
<DIV dir=ltr><FONT face=Arial size=2>in the z-exag field type 8.9606e-6
and then enter</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2></FONT> </DIV>
<DIV dir=ltr><FONT face=Arial size=2>I hope this helps,</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2></FONT> </DIV>
<DIV dir=ltr><FONT face=Arial
size=2>Marco</FONT></DIV></DIV></DIV></BLOCKQUOTE></DIV><BR></BLOCKQUOTE></BODY></HTML>