Question

I’m using http://www.openstreetmap.org/ export utility to generate
a .osm (xml map file) of an area, to later generate a .map file with
osmosis, but i can’t extract the .osm because i got this error:

“You requested too many nodes (limit is 50000). Either request a
smaller area, or use planet.osm”

How can i generate maps of more than 50.000 nodes? how to use
planet.osm? i’m blocked :S

Answer 1

As the message says, if you need to process large amount of data, you generally have two options:

1. Generate smaller requests, and later merge them before processing (this is probably not an ideal method, generally).
2. Download planet.osm, which is a database dump of the whole of OpenStreetMap, and process it. Since it is a huge file (several GB), the first step when processing this file is usually to extract the part which is interesting for you, and there are already preprocessed extracts available (e.g. on Geofabrik).