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Commit | Line | Data |
---|---|---|
50a14534 EB |
1 | Mercator Projection |
2 | zoom=17 -- 200x200 | |
3 | sides just reach each other (+-180 long) | |
4 | middle is 0 degrees -- Greenwich Meridian | |
5 | middle is equator | |
6 | zooming in is 2x | |
7 | The northwestern most tile is always 0,0 and x,y increase by one | |
8 | ||
9 | * easy to convert x,y -> ttqs etc. | |
10 | ||
11 | highest is 1 "mpp" MERCATOR. | |
12 | ||
13 | ||
14 | therefore top must be 85.051128779806582259 = DEMARCLAT(180) |