[Qgis-developer] Testing new network analyses

Paolo Cavallini cavallini at faunalia.it
Sat Dec 24 02:25:43 PST 2016


Hi,

Il 14/12/2016 09:04, Paolo Cavallini ha scritto:

> I am aware of the issue, I tried increasing tolerance, with no results.
> That happened with EPSG:4326; when switching to a metric CRS, it works.
> My interpretation is that setting a too high tolerance, easy for degrees
> (e.g. 1 degree is huge) makes it impossible to compute the path.
> Maybe the user should be warned about this.

I tried again, with a bit more time, and:
* I can compute shortest paths with the two algs
* I cannot get meaningful convex hullsfor the two service area algs.
I'm probably not understanting how the area algs work. Alex, could you
please give a quick explanation, or point to an existing one, and/or
share a sample project and params?
Thanks a lot.

-- 
Paolo Cavallini - www.faunalia.eu
QGIS & PostGIS courses: http://www.faunalia.eu/training.html
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