4 ms·
Does anyone have any pointers to tutorials on how to get started building OSM maps? For example, if I have my own "map" of the US (a simple graphic image), how
by aasarava 15y ago
Does anyone have any pointers to tutorials on how to get started building OSM maps? For example, if I have my own "map" of the US (a simple graphic image), how do I go about connecting that up to state boundaries and plotting lat/long on it, and then breaking it all up into tiles? I feel like that part of the puzzle is always missing from blog posts like these (though the post is helpful for the bigger infrastructure picture.)
- notaddicted 15y agoThis isn't 100% what you're asking about, but http://mapsfromscratch.com/ http://mapsfromscratch.com/ has instructions for how to render and server map tiles, where you basically control the whole stack.
- saras 15y agoWhile notaddicted's reply can also be useful to you, I think the part of the puzzle that you are missing is "georeferencing". From your example, with a raster (bitmap, image) map of the US: the part where you start connecting that to lat/lon is georeferencing. Essentially, you want to tie a spatial reference to your image, so that the raster's state boundaries will correspond to state boundaries on a "real" map. You can think of it as pinning an image you know nothing about to a map you do know something about, and then copying the information from known to unknown. There are plenty of ways to georeference an image. The easiest would be to use something like QGIS or GRASS (both opensource GIS software). You will need existing spatial data to base your (as of now, non-spatial) map on: a shapefile of the state boundaries would work great. Once you've wrapped your head around georeferencing and the idea of spatial vs nonspatial data, you will probably get more out of the mapsfromscratch tutorial.