[postgis-users] RE Best projection srid for topology

Marc-André Goderre magoderre at cgq.qc.ca
Wed May 27 10:00:34 PDT 2015

That's the problem. I use the whole planet road data. I' can't use UTM or MTM meter srid.

De : postgis-users-bounces at lists.osgeo.org [mailto:postgis-users-bounces at lists.osgeo.org] De la part de Steve.Toutant at inspq.qc.ca
Envoyé : 27 mai 2015 12:56
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Objet : [postgis-users] RE Best projection srid for topology

If you need to translate to meter I think you should avoid 3857 if you need precision on linear or surface measure.
It depend where on earth you are....

Marc-André Goderre <magoderre at cgq.qc.ca<mailto:magoderre at cgq.qc.ca>>@lists.osgeo.org
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2015-05-27 11:32
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[postgis-users] Best  projection srid for topology

Hello all,
I'm working on a many million lines topology project with OSM data in 4326 srid. I'd like to know if i should transform their geom in a meter srid ( like 3857). Should it be faster for the 'toTopoGeom()' function to work with geometry in 4326 or in 3857 srid?

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