I want to pass some instructions on how to reach a certain place to friends. Several routes are available with advantages and disadvantages (like shortest route, fastest route, prettiest route, most fun route,...).
A simple solution would be to download the map tiles and then use a graphic editor such as gimp and add a transparent colored line covering the routes I recommend. Then I can share the resulting image file and I have the desired effect. The problem is, that I need to repeat this task over and over if the map updates (at least if I want my map to be up to date as well) and people can't scroll or zoom.
I am open for other ideas as well.
You could get the whole layer into JOSM, select your route, then make an inverse selection so everything else is selected. Now go to EDIT->PURGE (do NOT DELETE instead) and export the result as GPX.
Btw.: I doubt you would have to change your GIMP-overlay very often. Mostly the route overlay would not change when the map slightly changes (simply keep the layers separate and exchange the map underneath), but I agree that an openlayers overlay is nicer.
answered 15 Sep '11, 23:04