holizz/go-tile-server

In-memory OSM tile server written in Go

go-tile-server's Issues

Rendering overlaping objects

Hi,
I found your project when I was looking for a way to render tiles with OSM data. I fixed it up and made it work again. I have since started to write my own implementation with different pbf parser and drawing library.

One thing that I am not able to figure out for some weird reason, by staring at the code, is how are you able to render roads or ways that overlap tiles? I am still limited to ways enclosed within the tile right now(in my implementation).

Looking at the DrawTile() function it seems like you take all nodes that are within the desired tile or the one next and up to it(the nwPt, sePt variables) but that does not explain the fact that you are able to properly render and enclose those polylines correctly on desired tile, not to mention that you specifically check for "withinBounds". I am simply baffled by this, it makes no sense to me.

Could you maybe try to explain what I'm not seeing here?

Firs image is your library, second image is mine. The colors are random to detect areas, you can clearly see that your solution has roads and overlaping areas wherreas mine does not.