Spherical mercator coordinate and tile utilities
The mercantile module provides ul(xtile, ytile, zoom) and bounds(xtile, ytile, zoom) functions that return longitudes and latitudes for XYZ tiles, and a xy(lon, lat) function that returns spherical mercator x and y coordinates.
>>> import mercantile
>>> mercantile.ul(486, 332, 10)
(-9.140625, 53.33087298301705)
>>> mercantile.bounds(486, 332, 10)
(-9.140625, 53.12040528310657, -8.7890625, 53.33087298301705)
>>> mercantile.xy(*mercantile.ul(486, 332, 10))
(-1017529.7205322663, 7044436.526761846)mercantile.tool
Mercantile includes a script that writes the extent of an XYZ tile out as GeoJSON.
$ python -mmercantile.tool 20,35,6 --pretty
{
"features": [
{
"geometry": {
"coordinates": [
[
[
-67.5,
-21.943046
],
[
-67.5,
-16.636192
],
[
-61.875,
-16.636192
],
[
-61.875,
-21.943046
],
[
-67.5,
-21.943046
]
]
],
"type": "Polygon"
},
"id": "20,35,6",
"properties": {
"title": "XYZ tile 20,35,6"
},
"type": "Feature"
}
],
"type": "FeatureCollection"
}If you have geojsonio-cli installed, you can shoot this GeoJSON straight to geojson.io for lightning-fast visualization and editing.
$ python -mmercantile.tool 20,35,6 --compact | geojsonio
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