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On 04/17/2012 02:13 PM, G. Allegri wrote:
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cite="mid:CAB4g1=wRJhNGA-y9DmA90c14evZ318aXdXZeSTu83+LXqySP5A@mail.gmail.com"
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<div style="direction:ltr" bgcolor="#FFFFFF" text="#660000">Now
run v.distance as:<br>
v.distance from=gps_point to=river_line upload=to_along
column=along out=connectors <br>
# The output parameter hold the line segments connecting
each point to the river_line. It's required by the module to
run, by has no significance for you. <br>
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<div>I have never tested the to_along upload type, but what is
considered the "to" nearest point in this case? I mean, you
will have the original points located on the endpoints of the
line, isn't the nearest point the endpoint itself?</div>
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<br>
IIUC, v.distance finds the distance along the line from each point
to the *vertex* on the line closest to that point. <br>
But in this particular case, since we're creating the line from the
same input points, the line vertices and the points are all the
same, so I think it shouldn't matter. The distance from the points
to the nearest vertex will always be 0, and 'to_along' should give
the distance along the line to that vertex=point.<br>
<br>
If I'm wrong, someone on the list with more experience will jump
up...<br>
<br>
<br>
<blockquote
cite="mid:CAB4g1=wRJhNGA-y9DmA90c14evZ318aXdXZeSTu83+LXqySP5A@mail.gmail.com"
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<div>giovanni</div>
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Cheers,<br>
Micha
<div class="im"><br>
<blockquote type="cite"> <br>
Help would be really appreciated. And I am sorry if that
has been asked before but I couldn't find a thread
dealing with that. <br>
<br>
Best regards, <br>
Harald <br>
<br>
<br>
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<span class="HOEnZb"><font color="#888888">
<pre cols="72">--
Micha Silver
052-3665918
</pre>
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