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I want to take a bit of pre-existing map and add fictional things to it. Is this possible and if so, how? |
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If you would like to add fictional data to the OSM dataset itself - by editing the map on openstreetmaps.org (osm.org) - then that is not allowed. See the How We Map page on the Wiki:
Of course, you can always create derivative works if you fulfill the license requirements, or if your only goal is to mark a few spots on a map you can use 3rd party services or libraries (like Leaflet) to display markers or shapes over the map. |
In what way do you want to use the map (print-out, a static picture, a zoomable map in a browser, something interactive, ...)? And how large an area are you thinking about?
I want it to zoom out and by area, I'll say somewhere around the size of Heathrow airport