On the first release of Droidplanner I introduced a tool to help with the placement of Ground Control Points (visual markers placed on the field for aerial photogrammetry purposes). But on DroidPlanner 2 this tool has been removed, because it didn't really matched the idea of the rest of the application.
So for those how missed the tool (I'm sure not many), I forked the old DroidPlanner code into this new app leaving only the GCP related code. The same license applies (GPLv3) as in the old code, any any patches are welcome (but I don't think there will be much activity).
The operation is simple:
To use your own KML or KMZ file you must save them into your Android device storage, under the folder "/DroidPlanner/GCP/". The files can be created with Google earth, using just standard markers. As an alternative you can try to open a kml/kmz inside android (for example in a email attachment) and chose to use Survey GCP to open that file. (Note: there is a bug in the Nexus 7 where it doesn't load the file correctly from email attachments).
You can download it here.
And get the source here.
If you feel like donating to support the development go here.