OpenStreetMap editor for mobile devices
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[JOSM](http://josm.openstreetmap.org) and [Merkaartor](http://merkaartor.be/)
are really nice programs for editing OpenStreetMap data on the desktop, and
[OSMTracker](http://wiki.openstreetmap.org/wiki/OSMtracker) is acceptable for
Windows Mobile devices. However, OSMTracker is very inflexible when it comes
to tagging abilities. So a perfect mobile application would combine the best
of both worlds:

  * displaying the raw XML data, maybe in real-time via mobile internet 
    connection
  * displaying the rendered map
  * recording a GPX track
  * take pictures if the mobile device features a camera
  * serve as a voice recorder
  * adding and tagging nodes, ways, and maybe relations in a key=value manner
    * maybe allow presets for different objects, like JOSM has. These could be
      implemented like the customizable buttons in OSMTracker.
    * auto-completion for keys and values would be great for people like me 
      who cannot remember actual tag names...
    * The absolute killer feature would be the ability to automatically import
      the changed data into desktop software like JOSM/Merkaartor, and export 
      diffs.