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Say that I have an image of map (or just piece of the map), where between two points X and Y lead red line.

An example. The path between two cities, so some body can have nice cycle ride.

My question is. Is it possible to extract GPS coordinates along the RED line ? So the user throws the map to the system, and gets in return for example GPX file with coordinates, so he can put it in his garmin device.

Why this way ? Say I have software that automatically draws those red lines on maps. I want to be able automatically extract gps data from it.

I have no experience in GIS sorry.

What if the image is georeferenced ? What if not ?

closed as unclear what you're asking by Spacedman, Fran Raga, J.R, nmtoken, xunilk Sep 11 at 20:46

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

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    Yes, it is. See, that's how it feels to be spooned only part of the information. Please expand your post so it contains information, whether the image is georeferenced or not, which CRS the coordinates should be in, how far apart the coordinates should be? – Erik Sep 11 at 8:24

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