Online vector maps

[KOLANICH]

Hello. How about online vector layers? I mean that sometimes you don't want to download the whole map of the region (for example you are low on storage) but you just want to check your current location, for example you are looking for some POI nearby. So we need some way to get some vector data for specific location (OverPass API?) and merge it into vector layer. So I think we need the following features:

• a one which imports the data in some area around the point
• a one which imports the data in some area around each point around some linear feature like a road. First it should compute the area to be loaded, then decompose it on the smallest number of rectangles with some penalty for loading irrelevant areas, then load the rectangles.
• a one which uses A* to make a route assuming that destination and departure coordinates are known
  • imports data (if needed) around destination and departure points
  • uses kind of A : uses imported line features to try to make path, if there is no road in the angle to the destination and the region aroud the point is not loaded, osmand loads it and continues A
  • some heuristics to prevent fron loading large percentage of map
  • after A* is complete it purges the features far from the route and downloads other features like POI and buildings in some radius around each point of the route
• a one which constantly imports the features around the user's current location

[vshcherb]

Sounds interesting but this is quite from actual implementation. The closest path would be to support Mapbox tiles. We already support reading these tiles for Mapillary but it is not incorporated in the rendering engine itself. And it will be quite difficult to support custom rendering styles on top of it.

[thousandsofthem]

https://openmaptiles.org/schema/ ? Should be waaay faster to render from (vs current offline data format)

P.S. Created separate issue: https://github.com/osmandapp/Osmand/issues/6367