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Spherical mercator tile and coordinate utilities

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Spherical mercator coordinate and tile utilities


The mercantile module provides

ul(xtile, ytile, zoom)
ytile, zoom)
functions that respectively return the upper left corner and bounding longitudes and latitudes for XYZ tiles, a
xy(lng, lat)
function that returns spherical mercator x and y coordinates, a
tile(lng, lat,
function that returns the tile containing a given point, and quadkey conversion functions
quadkey(xtile, ytile, zoom)
for translating between quadkey and tile coordinates.

.. code-block:: pycon

>>> import mercantile
>>> mercantile.ul(486, 332, 10)
LngLat(lng=-9.140625, lat=53.33087298301705)
>>> mercantile.bounds(486, 332, 10)
LngLatBbox(west=-9.140625, south=53.12040528310657, east=-8.7890625, north=53.33087298301705)
>>> mercantile.xy(*mercantile.ul(486, 332, 10))
(-1017529.7205322663, 7044436.526761846)
>> mercantile.xy_bounds(486, 332, 10)
Bbox(left=-1017529.7205322663, bottom=7005300.768279833, right=-978393.962050256, top=7044436.526761846)
>>> mercantile.tile(*mercantile.ul(486, 332, 10) + (10,))
Tile(x=486, y=332, z=10)
>>> mercantile.quadkey(486, 332, 10)
>>> mercantile.quadkey_to_tile('0313102310')
Tile(x=486, y=332, z=10)

Also in mercantile are functions to traverse the tile stack.

.. code-block:: pycon

>>> mercantile.parent(486, 332, 10)
Tile(x=243, y=166, z=9)
>>> mercantile.children(mercantile.parent(486, 332, 10))
[Tile(x=486, y=332, z=10), Tile(x=487, y=332, z=10), Tile(x=487, y=333, z=10), Tile(x=486, y=333, z=10)]

Named tuples are used to represent tiles, coordinates, and bounding boxes.

Mercantile CLI

Mercantile's command line interface, named "mercantile", has commands for getting the shapes of Web Mercator tiles as GeoJSON and getting the tiles that intersect with a GeoJSON bounding box.

.. code-block:: console

$ mercantile --help
Usage: mercantile [OPTIONS] COMMAND [ARGS]...

Command line interface for the Mercantile Python package.

Options: -v, --verbose Increase verbosity. -q, --quiet Decrease verbosity. --version Show the version and exit. --help Show this message and exit.

Commands: bounding-tile Print the bounding tile of a lng/lat point, bounding box, or GeoJSON objects. children Print the children of the tile. neighbors Print the neighbors of the tile. parent Print the parent tile. quadkey Convert to/from quadkeys. shapes Print the shapes of tiles as GeoJSON. tiles Print tiles that overlap or contain a lng/lat point, bounding box, or GeoJSON objects.

See Also

__ is another python lib with added tile logic functionality (union tile shapes, find edge tiles, and find tile intersections for complex geometries).

__ provides many of the same features for Node.

__ has some of the GeoJSON features as mercantile and a few more (tile parents, quadkey).

__ is like mercantile, but with support for other TileMatrixSet grids.

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