Opentopomap rendering style

[pierrepoulpe]

Hello all!
I love organic maps, because it fast & light, works truly offline, and many functionalities like searching in metadata (ie. where are public water taps?).
I also love opentopomap, for the readability of the map. Unfortunately, android app opentopomapviewer doesn't offer a real offline mode (just keep tiles in cache after manually scrolling along a gpx path, at different zoom levels).

I think I understand opentopomap is using mapnik to render tiles (bitmap/raster) on server side, while organic maps downloads on the smartphone a (transformed/optimized) copy of openstreemap, close to its original format with a mix of metadata and vectorial geographic, and renders locally.
Two super different approaches...

How difficult would it be to offer an 'opentopomap style' rendering option in organic maps?
What would be the best approach?
1/ Modifiy organic maps renderer to mimic opentopomap style?
2/ Include mapnik renderer in android app? (is this just feasible)
...

Pierre, (developer/outdoor enthusiast/map geek)

[biodranik]

Please check #8673