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How would I map with precision about 900 planted trees on google-earth-pro? As a manual method I would think of taking a hundred readings on each with my phone and averaging them out, but that is a LOT of work (did it once with a bubble-sextant to win a bet). Is there an fdroid app to do this sort of thing (not interested in signupware)? Any other ideas?Surveying like that probably requires either differential GPS or real-time kinematics GPS.
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