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J22lill | 20 Jun 2012 12:09
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How to convert lines into points

I have to convert lines into points using  the v.to.points command, but it
doesn't succeed. Also, I am not particularly familiar with GRASS yet. 

I always got the same error:
/v.to.points input=gr_ne_water_clip_lines <at> Kodutoo2 type=line llayer=1
"output=C:/Documents and Settings/Kasutaja/My Documents/Dropbox/EMU
PhD/EpiNOVA GIS/Assignments/Kodutöö2/kodutöö
vol2/vietnam_ne_water_linestopoints.shp" dmax=100 -v
Illegal filename. Character  not allowed.

Illegal vector map name . Character ':' not allowed.

Output vector map name is not valid map name
Finished with error/

Can somebody help me? 

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Moritz Lennert | 20 Jun 2012 13:35
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Re: How to convert lines into points

On 20/06/12 12:09, J22lill wrote:
> I have to convert lines into points using  the v.to.points command, but it
> doesn't succeed. Also, I am not particularly familiar with GRASS yet.
>
> I always got the same error:
> /v.to.points input=gr_ne_water_clip_lines <at> Kodutoo2 type=line llayer=1
> "output=C:/Documents and Settings/Kasutaja/My Documents/Dropbox/EMU
> PhD/EpiNOVA GIS/Assignments/Kodutöö2/kodutöö
> vol2/vietnam_ne_water_linestopoints.shp" dmax=100 -v
> Illegal filename. Character  not allowed.
>
> Illegal vector map name . Character ':' not allowed.
>
> Output vector map name is not valid map name
> Finished with error/
>
> Can somebody help me?

Your output has to be a GRASS map name, not a filename. GRASS works with 
internal vector and raster formats. So you have to first run v.to.points 
to create an GRASS vector and then, if you need the map as shapefile, 
run v.out.ogr to export the map.

Moritz
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Micha Silver | 20 Jun 2012 13:52
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Re: How to convert lines into points

On 20/06/2012 13:09, J22lill wrote:
I have to convert lines into points using the v.to.points command, but it doesn't succeed. Also, I am not particularly familiar with GRASS yet. I always got the same error: /v.to.points input=gr_ne_water_clip_lines <at> Kodutoo2 type=line llayer=1 "output=C:/Documents and Settings/Kasutaja/My Documents/Dropbox/EMU PhD/EpiNOVA GIS/Assignments/Kodutöö2/kodutöö vol2/vietnam_ne_water_linestopoints.shp" dmax=100 -v Illegal filename. Character not allowed. Illegal vector map name . Character ':' not allowed.
As the error says, you can't have the ':' in the path name.
Try output="\Documents and Settings\Kasutaha\...." without the c:

Also two more comments-

You have the output name ending in .shp. This will NOT create a shapefile. You are creating a GRASS vector named "vietnam_ne_water_linestopoints.shp". You will then have to use the module v.out.ogr to export the GRASS vector to a shapefile

Also, it seems you have the LOCATION and MAPSET as names with "special" characters "öö". That might be asking for trouble. Sometimes it will work, sometimes maybe not...
I usually try to keep my grassdata directory with no spaces or special characters anywhere in the path. Might be overly cautious, but directory name errors are sometimes hard to find.
--
Micha

Output vector map name is not valid map name Finished with error/ Can somebody help me? -- View this message in context: http://osgeo-org.1560.n6.nabble.com/How-to-convert-lines-into-points-tp4982616.html Sent from the Grass - Users mailing list archive at Nabble.com. _______________________________________________ grass-user mailing list grass-user <at> lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user This mail was received via Mail-SeCure System.



-- Micha Silver 052-3665918 
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Micha Silver | 20 Jun 2012 13:57
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Re: How to convert lines into points

On 20/06/2012 14:52, Micha Silver wrote:
body p { margin-bottom: 0cm; margin-top: 0pt; } On 20/06/2012 13:09, J22lill wrote:
I have to convert lines into points using the v.to.points command, but it doesn't succeed. Also, I am not particularly familiar with GRASS yet. I always got the same error: /v.to.points input=gr_ne_water_clip_lines <at> Kodutoo2 type=line llayer=1 "output=C:/Documents and Settings/Kasutaja/My Documents/Dropbox/EMU PhD/EpiNOVA GIS/Assignments/Kodutöö2/kodutöö vol2/vietnam_ne_water_linestopoints.shp" dmax=100 -v Illegal filename. Character not allowed. Illegal vector map name . Character ':' not allowed.
As the error says, you can't have the ':' in the path name.
Try output="\Documents and Settings\Kasutaha\...." without the c:

Ooops, I meant:
output="vietnam_ne_water_linestopoints.shp"

Micha

Output vector map name is not valid map name Finished with error/ Can somebody help me? -- View this message in context: http://osgeo-org.1560.n6.nabble.com/How-to-convert-lines-into-points-tp4982616.html Sent from the Grass - Users mailing list archive at Nabble.com. _______________________________________________ grass-user mailing list grass-user <at> lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user This mail was received via Mail-SeCure System.



-- Micha Silver 052-3665918

This mail was received via Mail-SeCure System.


_______________________________________________ grass-user mailing list grass-user <at> lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user This mail was received via Mail-SeCure System.



-- Micha Silver 052-3665918 
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