Switch to SVG icons

[nebulon42]

SVG-ifying icons helps with e.g. rendering high-resolution tiles.

[der-stefan]

We did tests with SVG icons in the very beginning of the project, but found out that raster graphics are the best choice for pixel precise renderings. By the way: Every icon was drawn by myself and optimized for hours. But yes, there is the idea of generating vector maps in the future, and of course with vector icons.

[hholzgra]

I'm actually playing with this right now, for better printable output in my MapOSMatic clone ...

Stuff is in the "hartmut-dev" branch of my fork:

https://github.com/hholzgra/OpenTopoMap/commits/hartmut-dev

[alexandervlpl]

It would be good to include SVG versions in symbols-otm like @hholzgra did (nice work). This way people who need higher resolution rendering can easily use them.

@der-stefan: maybe you have source files for these icons that can be easily vectorised, instead of redrawing them by hand?

I can add a few more SVGs to @hholzgra 's collection and submit a PR.