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On 03/21/2012 06:46 PM, Pierluigi De Rosa wrote:
<blockquote cite="mid:1332348418.4808.7.camel@pierluigi-laptop"
type="cite">
<pre wrap="">Hi
I'm looking for a procedure to get a point vector obtained as
intersection of two vector layer.</pre>
</blockquote>
<br>
You can do this with a two step procedure. First patch the two line
vectors together with v.patch. Then run v.clean using the
"error=..." option. It's not so intuitive, but the "errors" output
vector holds the topology "errors". In the case of patching two line
vectors, this will be all the intersection points that v.clean
creates when building topology. (Note that it's theoretically
possible that the two vectors will have an intersection exactly on a
node, and then this node will not be in the errors output vector.
But if the line vectors are independant, this is highly unlikely)<br>
<br>
<blockquote cite="mid:1332348418.4808.7.camel@pierluigi-laptop"
type="cite">
<pre wrap="">
I want to have the same output of v.overlay (option and) but for two
line vector. So I need as geometry points located exactly at the
intersection of two layers and attribute table as spatial joint of the
two attribute table.</pre>
</blockquote>
<br>
This method will find the intersections between the two line
vectors, but it *does not* combine the attribute tables. Only the
attribs from the first table listed in v.patch are included.<br>
HTH,<br>
MIcha<br>
<br>
<blockquote cite="mid:1332348418.4808.7.camel@pierluigi-laptop"
type="cite">
<pre wrap="">
does anyones have ideas?
Thanks
Pierluigi
________________________________________________________________________
Ing. Pierluigi De Rosa (PhD)
Studio Associato GFOSSERVICES
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</pre>
</blockquote>
<p><br>
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<br>
<pre class="moz-signature" cols="72">--
Micha Silver
GIS Consultant, Arava Development Co.
<a class="moz-txt-link-freetext" href="http://www.surfaces.co.il">http://www.surfaces.co.il</a></pre>
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