[OSM-talk] JOSM to display downloaded area

[Raphaël Jacquot]

Frederik Ramm wrote:

> * store downloaded area with every download
> * also store "source area" in the file if data is saved, and read back 
> from file when loading
> * downloaded area may consist of a number of polygons (if you repeatedly 
> download small sections - intersecting rectangles merge into one 
> polygon, disjunct rectangles give separate polygons)
> * area outside the downloaded area should be shaded somehow, and maybe 
> edits in such an area should be forbidden outright?

how about using a per object flag that states if said object can be 
modified (that is, it was in the box)