[OSM-talk] osm2pgsql and proper/legacy mercator

[Francois Van Der Biest]

Hi list,

osm2pgsql --help says:
-m|--merc: Store data in proper spherical mercator (default)
-M|--oldmerc: Store data in the legacy OSM mercator format

I'm wondering what's the difference between those two srs.
Which one is epsg:900913 (aka epsg:3785
http://www.spatialreference.org/ref/epsg/3785/) ?

My experience (importing an osm dump into postgis, then exporting to
shapefiles) would let me think that the "legacy OSM mercator format"
is epsg:3785. So, what's the other one ?

Thank's,
F.