Spherical mercator and XYZ tile utilities
Project description
Spherical mercator coordinate and tile utilities
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, and a tile(lng, lat, zoom) function that returns the tile containing a given point.
>>> 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.tile(*mercantile.ul(486, 332, 10) + (10,))
Tile(x=486, y=332, z=10)Also in mercantile are functions to traverse the tile stack.
>>> 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.
$ mercantile
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:
children Write the children of the tile.
parent Write the parent tile.
shapes Write the shapes of tiles as GeoJSON.
tiles List 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
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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