You are correct, Valhalla is used for routing. Maps are rendered on the ELEMNT, BOLT and ROAM with mapsforge, BOLT2 with vtm. To look at map files there is cruiser cruiser (mapsforge) and cruiser-gl (vtm). Create updated maps with wahooMapsCreator. There is also some documentation how to add POI's or make a custom theme. Source: almost 2 years ago

I will say I'm for this setup, but what you're saying is not exactly true. You can customize what is shown with the styling wizard, and completely remove types of markers from maps you create. https://mapstyle.withgoogle.com/. - Source: Hacker News / about 1 year ago

I have a custom map that I use for a game, and I would like to change it's style to a dark one, like the one we can find on https://mapstyle.withgoogle.com/, or on https://console.cloud.google.com/. However, when trying to edit my map, I only have 6 styling options (default, satellite, landmass, etc...), none of those being dark. Is there any way I could add a dark style? Maybe with the "JSON" you can generate... Source: over 1 year ago

To that end, I took screenshots using Google's Map Style App. Really handy tool for getting a good sense of scale without having to deal with city names and other labels. I put those into GIMP as a base layer and edited the whole thing from there. It ended up being a way bigger project than I anticipated! I worked at it on and off for a couple months and finalized it with two versions of the map: the one you see... Source: over 1 year ago

I start by styling google maps to get the extra garbage out of there. Then I screen capture it and I finesse it with Photoshop or GIMP (free) to get the pics in a usable state for the laser cutter. Then I used LightBurn to actually make the cuts and etches. Source: over 1 year ago

To make this map I first used styling wizard and took a screenshot of the city, then opened inkscape to vectorise the image (to get vector quality). Source: over 1 year ago