[OSM-talk] Visual diff of geometries

[Tobias Preuss]

Hello.

I am looking for a web tool to compare geometries which changed over time.
The visual representation should show where the polygon has changed.
It could look like the example shown in the linked image [1].

I already did some research and found the following tools dealing with
"openstreetmap" and "history":

OSM Live Map: http://osmlab.github.io/osm-live-map/
OSM Deep History: http://iandees.github.io/osm-deep-history/
OSM History Viewer: http://osmhv.openstreetmap.de/index.jsp
achavi - Augmented OSM Change Viewer: http://nrenner.github.io/achavi/

If there is none - I am going to build a web tool. I already started
with some experiments which can be found here:

https://bitbucket.org/tbsprs/umweltzonenleaflet
https://bitbucket.org/tbsprs/umweltzonendatabaseapi

A challenging problem about this is that the tags might be different
at a certain
point in time if data is queried via tags. This happens when the
tagging schema changed.

Best regards,
Tobias


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[1] http://s1.postimg.org/8a2tjjkf3/polygon.png