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List supported grids

import morecantile

>>> [

Load one of the default grids

import morecantile

tms = morecantile.tms.get("WebMercatorQuad")
>>> <TileMatrixSet title='Google Maps Compatible for the World' identifier='WebMercatorQuad'>

Create tile and get bounds

import morecantile

tms = morecantile.tms.get("WebMercatorQuad")

# Get the bounds for tile Z=4, X=10, Y=10 in the input projection
tms.xy_bounds(morecantile.Tile(10, 10, 4))
>>> BoundingBox(left=5009377.085697308, bottom=-7514065.628545959, right=7514065.628545959, top=-5009377.085697308)

# Get the bounds for tile Z=4, X=10, Y=10 in LatLon (WGS84)
tms.bounds(morecantile.Tile(10, 10, 4))
>>> BoundingBox(left=44.999999999999964, bottom=-55.776573018667634, right=67.4999999999999, top=-40.97989806962009)

Find tile for lat/lon

import morecantile

tms = morecantile.tms.get("WebMercatorQuad")

tms.tile(159.31, -42, 4)
>>> Tile(x=15, y=10, z=4)

# Or using coordinates in input CRS
x, y = tms.xy(159.31, -42)
print(x, y)
>>> (17734308.078276414, -5160979.444049781)

tms._tile(x, y, 4)
>>> Tile(x=15, y=10, z=4)

Get Geojson Feature

import morecantile

tms = morecantile.tms.get("WebMercatorQuad")

tms.feature(morecantile.Tile(10, 10, 4))

>>> {
    'type': 'Feature',
    'bbox': [
    'id': 'Tile(x=10, y=10, z=4)',
    'geometry': {
        'type': 'Polygon',
        'coordinates': [[
            [44.999999999999964, -55.776573018667634],
            [44.999999999999964, -40.97989806962009],
            [67.4999999999999, -40.97989806962009],
            [67.4999999999999, -55.776573018667634],
            [44.999999999999964, -55.776573018667634]
    'properties': {
        'title': 'XYZ tile Tile(x=10, y=10, z=4)',
        'grid_name': 'WebMercatorQuad',
        'grid_crs': 'EPSG:3857'

Define custom grid

You can create custom TMS grid using morecantile.TileMatrixSet.custom method.

Here are the available options:

  • extent (list of float, REQUIRED]: a list of coordinates in form of [xmin, ymin, xmax, ymax] describing the extend of the TMS

  • crs (pyproj.CRS, REQUIRED): Coordinate reference system of the grid

  • tile_width (int, defaults to 256): Width of each tile of this tile matrix in pixels (variable width is not supported)

  • tile_height (int, defaults to 256): Height of each tile of this tile matrix in pixels (variable height is not supported)

  • matrix_scale (list of int, default to [1, 1]): Tiling schema coalescence coefficient (see

  • extent_crs (pyproj.CRS, defaults to TMS CRS): extent's coordinate reference system

  • minzoom (int, defaults to 0): Tile Matrix Set minimum zoom level

  • maxzoom (int, defaults to 24): Tile Matrix Set maximum zoom level

  • title (str, defaults to Custom TileMatrixSet): Tile Matrix Set title

  • identifier (str, defaults to Custom): Tile Matrix Set identifier

  • geographic_crs (pyproj.CRS, defaults to EPSG:4326): Geographic (lat,lon) coordinate reference system

import morecantile
from pyproj import CRS

crs = CRS.from_epsg(3031)
extent = [-948.75, -543592.47, 5817.41, -3333128.95]  # From https:///
customEPGS3031 = morecantile.TileMatrixSet.custom(extent, crs, identifier="MyCustomTmsEPSG3031")

>>> {
    "type": "TileMatrixType",
    "identifier": "0",
    "scaleDenominator": 38916524.55357144,
    "topLeftCorner": [-948.75, -3333128.95],
    "tileWidth": 256,
    "tileHeight": 256,
    "matrixWidth": 1,
    "matrixHeight": 1

And register the TMS

default_tms = morecantile.tms.register(customEPGS3031)
tms = default_tms.get("MyCustomTmsEPSG3031")
>>> <TileMatrixSet title='Custom TileMatrixSet' identifier='MyCustomTmsEPSG3031'>


starting with morecantile==1.3.0, you can create TMS using custom CRS.

import morecantile
from pyproj import CRS

crs = CRS.from_proj4("+proj=stere +lat_0=90 +lon_0=0 +k=2 +x_0=0 +y_0=0 +R=3396190 +units=m +no_defs")
extent = [-13584760.000,-13585240.000,13585240.000,13584760.000]
tms = morecantile.TileMatrixSet.custom(extent, crs, identifier="MarsNPolek2MOLA5k")

Extend morecantile default TMS

Since the release of morecantile 1.3.1, users can automatically extend morecantile default TMS with their custom TMS JSON files stored in a directory by setting TILEMATRIXSET_DIRECTORY environment.


Morecantile will look for all .json files within the directory referenced by TILEMATRIXSET_DIRECTORY.

  • Filename HAVE TO be the same as the TMS identifer
  • Filename HAVE TO be without special characters [a-zA-Z0-9_]

Morecantile + Pydantic

Morecantile uses Pydantic to define and validate TileMatrixSet documents.

From Pydantic docs:

Define how data should be in pure, canonical python; validate it with pydantic.

Pydantic model enforce the TileMatrixSet OGC specification for the whole project by validating each items.

Because we use pydantic model to handle the TileMatrixSets you can uses pydantic's helper functions directly.

import morecantile

my_tms_doc = "~/a_tms_doc.json"

tms = morecantile.TileMatrixSet.parse_file(my_tms_doc)