[OSM-dev] Default scale / meters per unit ?

Frank Broniewski brfr at metrico.lu
Wed Sep 30 12:28:43 BST 2009

On Wednesday 30 September 2009 13:14:08 Jonas Donovan Hansen wrote:
> When importing openstreetmap with osm2pgsql and default settings (900913) -
> how many meters is a unit?
> /Jonas

Whatever a unit is, that is totally dependent on scale and your renderer. The 
data in postgresql is vector data and has no scale. The coordinates of the 
reference system 900913 are metric, so you can calculate with them. The values 
of your bounding box are in meters, so you can calculate the current scale of 
your data with the corner values of the bounding box.


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