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+init=epsg:3857 should be default projection description #4213

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openstreetmap-trac opened this issue Jul 23, 2021 · 1 comment

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Component: mapnik Priority: minor Resolution: fixed Type: defect

openstreetmap-trac commented Jul 23, 2021

Reporter: komzpa[at]gmail.com
[Submitted to the original trac issue database at 8.51pm, Monday, 6th February 2012]

+init=epsg:3857 should be default projection description.

Why:

osm.xml/tirex pair will work faster, omitting useless reprojections (see http://trac.openstreetmap.org/ticket/4212);
mapnik itself has some internal optimization that relies on +init=epsg:3857 as spherical mercator description;
this will be one of the steps to get rid of all the "spherical mercator hell", see http://wiki.openstreetmap.org/wiki/Spherical_Mercator for the list of different names and definitions

openstreetmap-trac added Component: mapnik Priority: minor Resolution: fixed Type: defect labels

openstreetmap-trac self-assigned this

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openstreetmap-trac commented Jul 23, 2021

Author: Andy Allan
[Added to the original trac issue at 7.40pm, Monday, 9th December 2013]

We use what tilemill uses, which is effectivly epsg:3857 plus "+over"

openstreetmap-trac closed this as completed

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