Information

Usage

Import Data

Generate one Tile

Generate multiple tiles

Run tile server

Implementation Details

Format of imported data

Formulas used

Retrieve Tile

For a latitude $\varphi$ and a longitude $\lambda$, both in radians, we can calculate the n_th tile in $x$ and $y$ direction for a given zoom level $z$.

$$ x = \lfloor {\varphi + \pi \over 2\pi} \cdot 2^{z} \rfloor $$

$$ y = \lfloor (1 - {\ln ( \tan \varphi + {1 \over \cos \varphi}) \over \pi}) \cdot 2^{z-1} \rfloor $$

Get bounding box of tile