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Description

Spherical mercator tile and coordinate utilities

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Mercantile

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Spherical mercator coordinate and tile utilities

Documentation: http://mercantile.readthedocs.io/en/latest/

The mercantile module provides

ul(xtile, ytile, zoom)
and
bounds(xtile,
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,
zoom)
function that returns the tile containing a given point, and quadkey conversion functions
quadkey(xtile, ytile, zoom)
and
quadkey_to_tile(quadkey)
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)
'0313102310'
>>> 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. --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. 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

docs/cli.rst 
__ for more about the mercantile program.

See Also

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

node-sphericalmercator 
__ provides many of the same features for Node.

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

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