maplibre/util/
grid.rs

1use tile_grid::{extent_wgs84_to_merc, Extent, Grid, GridIterator, Origin, Unit};
2
3pub fn google_mercator() -> Grid {
4    Grid::new(
5        256,
6        256,
7        Extent {
8            minx: -20037508.342789248,
9            miny: -20037508.342789248,
10            maxx: 20037508.342789248,
11            maxy: 20037508.342789248,
12        },
13        3857,
14        Unit::Meters,
15        vec![
16            156543.033928041,
17            78271.5169640205,
18            39135.75848201025,
19            19567.879241005125,
20            9783.939620502562,
21            4891.969810251281,
22            2445.9849051256406,
23            1222.9924525628203,
24            611.4962262814101,
25            305.7481131407051,
26            152.87405657035254,
27            76.43702828517627,
28            38.218514142588134,
29            19.109257071294067,
30            9.554628535647034,
31            4.777314267823517,
32            2.3886571339117584,
33            1.1943285669558792,
34            0.5971642834779396,
35            0.2985821417389698,
36            0.1492910708694849,
37            0.07464553543474245,
38            0.037322767717371225,
39        ],
40        Origin::TopLeft,
41    )
42}
43
44///
45/// Returns coordinates for tiles within bavaria according to the specified grid.
46/// The grid is responsible for defining the coordinate system. For example whether
47/// [Slippy map tilenames](https://wiki.openstreetmap.org/wiki/Slippy_map_tilenames) (also known as
48/// XYZ) or [TMS](https://wiki.osgeo.org/wiki/Tile_Map_Service_Specification#TileMap_Diagram) is
49/// used.
50///
51/// ## Additional Resources:
52///
53/// * https://www.maptiler.com/google-maps-coordinates-tile-bounds-projection
54/// * https://gist.github.com/maptiler/fddb5ce33ba995d5523de9afdf8ef118
55pub fn tile_coordinates_bavaria(grid: &Grid, zoom: u8) -> Vec<(u8, u32, u32)> {
56    let tile_limits = grid.tile_limits(
57        extent_wgs84_to_merc(&Extent {
58            minx: 8.9771580802,
59            miny: 47.2703623267,
60            maxx: 13.8350427083,
61            maxy: 50.5644529365,
62        }),
63        0,
64    );
65
66    GridIterator::new(zoom, zoom, tile_limits).collect()
67}
maplibre/util/grid.rs

maplibre/util/
grid.rs
