[postgis-users] RE Best projection srid for topology

[Steve.Toutant at inspq.qc.ca]

UTM covers the earth, could you generate the 120 zones and translate 
data...
I don't know after it is usable for topology......




Marc-André Goderre <magoderre at cgq.qc.ca>@lists.osgeo.org 
Envoyé par : postgis-users-bounces at lists.osgeo.org
2015-05-27 13:00
Veuillez répondre à
PostGIS Users Discussion <postgis-users at lists.osgeo.org>


A
PostGIS Users Discussion <postgis-users at lists.osgeo.org>
cc

Objet
Re: [postgis-users] RE  Best  projection srid for topology








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>@lists.osgeo.org 
Envoyé par : postgis-users-bounces at lists.osgeo.org 
2015-05-27 11:32 


Veuillez répondre à
PostGIS Users Discussion <postgis-users at lists.osgeo.org>



A
"postgis-users at lists.osgeo.org" <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
http://lists.osgeo.org/cgi-bin/mailman/listinfo/postgis-users

_______________________________________________
postgis-users mailing list
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/20150527/28def569/attachment.html>