[OSM-newbies] uploading prepared data

[Andrew Harris]

I am wondering how to upload substantial chunks of prepared data.

I work for a university and hope to get access to the building  
outlines and data from our centrally managed buildings database. What  
is my best way of loading this data into OSM? - Do I convert it to  
gpx, open it in josm and upload? Is it that simple?

Andrew Harris
37.7638°S 144.9411°E