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<DIV dir=ltr align=left><SPAN class=950281723-06032020><FONT color=#000080
size=2 face=Arial>Hi Markus,</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=950281723-06032020><FONT color=#000080
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=950281723-06032020><FONT color=#000080
size=2 face=Arial>I will look into this Grass function and how I can use
it. I am not sure however if it can output polygons rather than lines
</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=950281723-06032020><FONT color=#000080
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=950281723-06032020><FONT color=#000080
size=2 face=Arial>Cheers</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=950281723-06032020><FONT color=#000080
size=2 face=Arial>Karsten</FONT> </SPAN></DIV><BR>
<DIV lang=en-us class=OutlookMessageHeader dir=ltr align=left>
<HR tabIndex=-1>
<FONT size=2 face=Tahoma><B>From:</B> Markus Neteler [mailto:neteler@osgeo.org]
<BR><B>Sent:</B> Friday, March 06, 2020 14:55<BR><B>To:</B>
karsten<BR><B>Cc:</B> OSGeo-discuss<BR><B>Subject:</B> Re: [OSGeo-Discuss]
geospatial algorithm to create area midway boundaries from lines
?<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV>Hi Karsten,
<DIV><BR></DIV>
<DIV>Probably this GRASS GIS Addon can help:</DIV>
<DIV><BR></DIV>
<DIV><A
href="https://grass.osgeo.org/grass7/manuals/addons/v.centerline.html">https://grass.osgeo.org/grass7/manuals/addons/v.centerline.html</A><BR></DIV>
<DIV><BR></DIV>
<DIV>If I got your wish right...</DIV>
<DIV><BR></DIV>
<DIV>Best,</DIV>
<DIV>Markus</DIV>
<DIV><BR></DIV></DIV><BR>
<DIV class=gmail_quote>
<DIV class=gmail_attr dir=ltr>karsten <<A
href="mailto:karsten@terragis.net">karsten@terragis.net</A>> schrieb am Fr.,
6. März 2020, 17:36:<BR></DIV>
<BLOCKQUOTE class=gmail_quote
style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid"><U></U>
<DIV>
<DIV><FONT color=#000080 size=2 face=Arial><SPAN>Hi All,</SPAN></FONT></DIV>
<DIV><FONT color=#000080 size=2 face=Arial><SPAN></SPAN></FONT> </DIV>
<DIV><FONT color=#000080 size=2 face=Arial><SPAN>a general geospatial question
to all: </SPAN></FONT></DIV>
<DIV><FONT color=#000080 size=2 face=Arial><SPAN>I am trying to find out if
there is any existing geospatial algorithm (in any open Open Source
Geospatial software) that would allow to use a network of lines as a start
point and expand those in such a way that I can create new area boundaries for
each of the lines "coverage area". What I mean with that is if one could
"buffer" the lines out in such a way to create boundaries where any potential
buffers would meet at the middle way point between the lines so that in the
end I could have an area within that is the starting line. On example could
look like this (5 hand drawn lines in red and corresponding colored areas
that I would want to create). Note that is exact but to communicate the idea)
see <A
href="http://terra5.terragis.net/sites/html/aeras_for_lines%20copy.png"
rel=noreferrer
target=_blank>http://terra5.terragis.net/sites/html/aeras_for_lines%20copy.png</A></SPAN></FONT></DIV>
<DIV><FONT color=#000080 size=2 face=Arial><SPAN></SPAN></FONT> </DIV>
<DIV><FONT color=#000080 size=2 face=Arial><SPAN>It's kind of similar to
Thiessen polygons but for lines instead of points...</SPAN></FONT></DIV>
<DIV><FONT color=#000080 size=2 face=Arial><SPAN></SPAN></FONT> </DIV>
<DIV><FONT color=#000080 size=2 face=Arial><SPAN>One preference would be if
there was something that could be used programmatically on large data sets
...</SPAN></FONT></DIV>
<DIV><FONT color=#000080 size=2 face=Arial></FONT> </DIV>
<DIV><SPAN><FONT color=#000080 size=2 face=Arial>Cheers</FONT></SPAN></DIV>
<DIV><SPAN><FONT color=#000080 size=2 face=Arial>Karsten</FONT></SPAN></DIV>
<DIV><SPAN><FONT color=#000080 size=2 face=Arial></FONT></SPAN> </DIV>
<DIV align=left>
<DIV><SPAN
style="FONT-SIZE: 11pt; FONT-FAMILY: 'Verdana','sans-serif'">Karsten
Vennemann<BR></SPAN><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 'Verdana','sans-serif'"><SPAN
style="COLOR: #003264"><A
title="http://www.terragis.net/
blocked::http://www.terragis.net/"
href="http://www.terragis.net" rel=noreferrer target=_blank><FONT
title=http://www.terragis.net/
color=#0000ff>www.terragis.net</FONT></A></SPAN></SPAN><U></U><U></U><U></U></DIV>
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