I'd like to save coordinates of points and boundary boxes in my local db, as quadtiles. I am looking for more doc than provided in the link above: a precise guide with code / pseudo code on how to convert long / lat to Quadtile format, and back. Any pointer on this? asked 24 Aug '18, 13:30  seinecle |
One Answer:
This Wiki article discusses conversion between tile names and lat/lon, and also includes pseudocode and example code for various languages. answered 24 Aug '18, 16:54  alester |
... which is linked in the introduction of the wiki article which seincle linked. I just wanted to add it. ;-) @seinecle, did you want something different your just not seen the link?
Thanks! I might be wrong but I thought the slippy tiles are not quad tiles? The logic of the naming conventions are completely different, if I read the page you linked to, and the link I provided?
If I understand correctly, the quad system for naming tiles starts with the biggest tile (number from 0 to 3), then adds a 0-3 number for the subtile, et .. until the required level of zoom is achieved. That' the general idea. Now I'd need docs and a lib to play with it! It seems Bing map has the equivalent (search for "quadkey + Bing maps")
@seinecle oh, umm, maybe I should have read better ("that's not really what this page is about"). So, you are right, if I understand correctly, slippy map tilenames are not what you are looking for. I have inserted a paragraph break into the wiki page's intro to make that clearer. Let's wait for other answers.