I want to take a picture of a trail map, then overlay it on google maps or somehow use it as a navigation image linked to GPS? I want to do this all on the phone, while i'm hiking/walking about and encounter a trail map. How can i do this?

  • 1
    Generally speaking app recommendations are considered off-topic here as outlined in the FAQ. If you can edit your question to make it more of a "how do I do this" question rather than a "is there an app that can" question you'll probably be safe.
    – newuser
    May 13, 2011 at 15:01

2 Answers 2


Sounds like you Custom Maps is exactly what you're after.


Locus supports that by a built-in function On Board Map Calibrator.

You can overlay and calibrate any picture over any map source supported by Locus.

On Board Calibrator

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