[postgis-users] RE Best projection srid for topology

[Marc-André Goderre]

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

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
À : PostGIS Users Discussion
Cc : postgis-users-bounces at lists.osgeo.org
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
Envoyé par : postgis-users-bounces at lists.osgeo.org<mailto:postgis-users-bounces at lists.osgeo.org>

2015-05-27 11:32
Veuillez répondre à
PostGIS Users Discussion <postgis-users at lists.osgeo.org<mailto:postgis-users at lists.osgeo.org>>


A

"postgis-users at lists.osgeo.org<mailto:postgis-users at lists.osgeo.org>" <postgis-users at lists.osgeo.org<mailto:postgis-users at lists.osgeo.org>>

cc

Objet

[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?
Thanks

Marc
_______________________________________________
postgis-users mailing list
postgis-users at lists.osgeo.org<mailto:postgis-users at lists.osgeo.org>
http://lists.osgeo.org/cgi-bin/mailman/listinfo/postgis-users


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/postgis-users/attachments/20150527/e7ae2ca0/attachment.html>