The server tries to merge conflicting saves of
the same layer.
What it does:
- use the `If-Unmodified-Since` header to check
if changes happened to the stored data ;
- Compare the incoming version with its reference version
to get a diff.
- Reapply the diff on top of the latest version.
- If the merge is not possible, return a
"422 Conflict" HTTP response.
- If the merge worked, return the merged document,
to be updated by the client.
uMap lets you create maps with OpenStreetMap layers in a minute and embed them in your site.
Because we think that the more OSM will be used, the more OSM will be improved.
Built on top of Django and Leaflet.
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