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Re: [igraph] Re: igraph and gis data

From: Tamas Nepusz
Subject: Re: [igraph] Re: igraph and gis data
Date: Fri, 3 Sep 2010 22:41:45 +0100


> hi thanks for answering, well I want to do is simple, regardless of a layer 
> of points (sites) of Grass Gis, formats, shp and "KML or gml", and another 
> layer of segments (roads and main streets) in the same format, and create 
> igraph network, in order to create distance matrices and attributes for 
> calculations of indicators of accessibility.
Well, it can be done, but you will have to either find a way to convert your 
GIS data to one of the raw graph formats igraph supports, or to write a script 
that extracts your data from the GIS files and then invokes the correct igraph 
commands (add.vertices, add.edges and such) to create the network.


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