Hi, that is an excellent question, but I'm not entirely sure what you are trying to achieve.
Are you trying to add some virtual points to a trip you are planning? (i.e. "at this point, I will have travelled 1 mile")
Or are you trying to add physical milestones (or historical milestones) into the shared geospation database called "OpenStreetMap"?
If so, the approach will be completely different.
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