[OSGeo-Discuss] geospatial algorithm to create area midway boundaries from lines ?

[Markus Neteler]

Hi Karsten,

With v.type you can then change the type "line" to "boundary" and
eventually place centroid(s) with v.centroid to complete closed boundaries
plus centroid to topologically correct areas.

Best,
Markus

karsten <karsten at terragis.net> schrieb am Fr., 6. März 2020, 18:28:

> Hi Markus,
>
> 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
>
> Cheers
> Karsten
>
> ------------------------------
> *From:* Markus Neteler [mailto:neteler at osgeo.org]
> *Sent:* Friday, March 06, 2020 14:55
> *To:* karsten
> *Cc:* OSGeo-discuss
> *Subject:* Re: [OSGeo-Discuss] geospatial algorithm to create area midway
> boundaries from lines ?
>
> Hi Karsten,
>
> Probably this GRASS GIS Addon can help:
>
> https://grass.osgeo.org/grass7/manuals/addons/v.centerline.html
>
> If I got your wish right...
>
> Best,
> Markus
>
>
> karsten <karsten at terragis.net> schrieb am Fr., 6. März 2020, 17:36:
>
>> Hi All,
>>
>> a general geospatial question to all:
>> 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
>> http://terra5.terragis.net/sites/html/aeras_for_lines%20copy.png
>>
>> It's kind of similar to Thiessen polygons but for lines instead of
>> points...
>>
>> One preference would be if there was something that could be used
>> programmatically on large data sets ...
>>
>> Cheers
>> Karsten
>>
>> Karsten Vennemann
>> www.terragis.net
>>
>> _______________________________________________
>> Discuss mailing list
>> Discuss at lists.osgeo.org
>> https://lists.osgeo.org/mailman/listinfo/discuss
>
>
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