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On 10/11/2010 14:20, nikmor wrote:
<blockquote cite="mid:310888.51622.qm@web57802.mail.re3.yahoo.com"
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<td style="font: inherit;" valign="top">hello sir,<br>
<br>
thanks for the link. I have tried it out and it works with
v.surf.rst. But when I use r.surf.contour it takes a very
very long time and it never ends. I would be thankful if
you could suggest me something regarding the
resolution(grid resolution 2d in g.region modules
resolution tab).<br>
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<br>
You can set the resolution to whatever you want. But choosing a
reasonable resolution depends on your source data and how large an
area you are working with. The contour lines you sent were at 5 m
spacing, and the area seems to be only 0.02 deg ~= 2 km. So you can
try a small resolution, such as 1 meter. So if you run (from the
command line)<br>
<br>
g.region vect=contour res=0:00:00.03 -p<br>
<br>
This should set the region to the extent of the contour vector, and
resolution to 3/100 arcsec or about 1 meter. Your raster will be
about 2000X2500 ( ~ 5,000,000 cells), and any modern computer can do
raster operations on that size in a reasonable time. <br>
<br>
<blockquote cite="mid:310888.51622.qm@web57802.mail.re3.yahoo.com"
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<td style="font: inherit;" valign="top"><br>
thanks,<br>
<br>
Nikhil Morajkar<br>
Junior Software Engineer,<br>
Department of Computer Science and Engineering,<br>
Geo-Spatial Information Science & Engineering (GISE),<br>
Advance Research Lab,<br>
Indian Institute of Technology, Bombay (IITB)<br>
Powai, Mumbai<br>
<br>
--- On <b>Wed, 11/10/10, Markus Neteler [via OSGeo.org] <i><<a
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wrote:<br>
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255); margin-left: 5px; padding-left: 5px;"><br>
From: Markus Neteler [via OSGeo.org] <<a
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href="/user/SendEmail.jtp?type=node&node=5724458&i=1"
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Subject: Re: Need some help in converting a contour map
to DEM map...<br>
To: "nikmor" <<a moz-do-not-send="true"
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Date: Wednesday, November 10, 2010, 2:00 PM<br>
<br>
<div id="yiv34458627">
On Tue, Nov 9, 2010 at 12:28 PM, nikmor <<a
moz-do-not-send="true" rel="nofollow" target="_top"
link="external">[hidden email]</a>> wrote:
<br>
>
<br>
> Hello friends
<br>
>
<br>
> I am trying to import an contour file and trying
to come up with an DEM map
<br>
> from it. I tried it my way but end up with wrong
output. I am looking
<br>
> forward for some one who can import this map and
convert it to DEM and
<br>
> finally and most importantly we should be able to
view the output in NVIZ. I
<br>
> have attached the folder having the contour data,
this data is of IIT
<br>
> bombay.
<br>
<br>
Please take a look here.
<br>
<a moz-do-not-send="true" rel="nofollow"
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<br>
Markus
<br>
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<pre class="moz-signature" cols="62">--
Micha Silver
<a class="moz-txt-link-freetext" href="http://www.surfaces.co.il/">http://www.surfaces.co.il/</a>
Arava Development Co. +972-52-3665918
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