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

2020-03-06 Thread 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 schrieb am Fr., 6. März 2020, 18:28: > Hi Markus, > > I will look into thi

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

2020-03-06 Thread karsten
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:nete...@osgeo.org] Sent: Friday, March 06, 2020 14:55 To: karsten Cc: OSGeo-discuss Subject: Re: [OS

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

2020-03-06 Thread karsten
Hi Pierre, I mean line segments like e.g. in a road or water GIS layer and they could be smooth or rather less smooth. The output I desire should be polygons and not lines. Overall I am looking for nothing exact here - any approximate interpolation about midway plus/minus would be fine... Karsten

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

2020-03-06 Thread Pierre Abbat
On Friday, 6 March 2020 17:36:15 EST karsten wrote: > 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 t

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

2020-03-06 Thread Markus Neteler
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 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

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

2020-03-06 Thread karsten
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 e