Landez manipulates tiles, builds MBTiles, does tiles compositing and arrange tiles together into single images.
Tiles can either be obtained from a remote tile service URL, from a local Mapnik stylesheet, a WMS server or from MBTiles files.
For building MBTiles, Landez embeds mbutil from Mapbox https://github.com/mapbox/mbutil at the final stage. The land covered is specified using a list of bounding boxes and zoom levels.
Landez is pure python and has no external dependency. :
sudo easy_install landezHowever, it requires mapnik if the tiles are rendered locally. :
sudo aptitude install python-mapnikAnd PIL to blend tiles together or export arranged tiles into images. :
sudo aptitude install python-imagingUsing a remote tile service (OpenStreetMap.org by default): :
import logging
from landez import MBTilesBuilder
logging.basicConfig(level=logging.DEBUG)
mb = MBTilesBuilder(cache=False)
mb.add_coverage(bbox=(-180.0, -90.0, 180.0, 90.0),
zoomlevels=[0, 1])
mb.run()Please respect Tile usage policies <http://wiki.openstreetmap.org/wiki/Tile_usage_policy>
Using mapnik to render tiles:
import logging
from landez import MBTilesBuilder
logging.basicConfig(level=logging.DEBUG)
mb = MBTilesBuilder(stylefile="yourstyle.xml", filepath="dest.mbtiles")
mb.add_coverage(bbox=(-180.0, -90.0, 180.0, 90.0),
zoomlevels=[0, 1])
mb.run()And with UTFGrids:
import logging
from landez import MBTilesBuilder
logging.basicConfig(level=logging.DEBUG)
mb = MBTilesBuilder(stylefile="yourstyle.xml",
grid_fields=["field1", "field2", "field3", ...] ,
filepath="dest.mbtiles")
mb.add_coverage(bbox=(-180, -90, 180, 90),
zoomlevels=[0, 1, 2, 3])
mb.run()import logging
from landez import MBTilesBuilder
logging.basicConfig(level=logging.DEBUG)
mb = MBTilesBuilder(mbtiles_file="yourfile.mbtiles", filepath="dest.mbtiles")
mb.add_coverage(bbox=(-180.0, -90.0, 180.0, 90.0),
zoomlevels=[0, 1])
mb.run()mb = MBTilesBuilder(wms_server="http://yourserver.com/geoserver/wms",
wms_layers=["ign:departements"],
wms_options=dict(format="image/png",
transparent=True),
filepath="dest.mbtiles")
mb.add_coverage(bbox=([-0.9853,43.6435.1126,44.0639]))
mb.run()Merge multiple sources of tiles (URL, WMS, MBTiles, Mapnik stylesheet) together. (requires python PIL)
For example, build a new MBTiles by blending tiles of a MBTiles on top of OpenStreetMap tiles :
mb = MBTilesBuilder(filepath="merged.mbtiles")
overlay = TilesManager(mbtiles_file="carto.mbtiles")
mb.add_layer(overlay)
mb.run()Or composite a WMS layer with OpenStreetMap using transparency (40%):
mb = MBTilesBuilder(wms_server="http://yourserver.com/geoserver/wms",
wms_layers=["img:orthophoto"])
overlay = TilesManager(remote=True)
mb.add_layer(overlay, 0.4)
mb.run()Assemble and arrange tiles together into a single image. (requires python PIL)
Specify tiles sources in the exact same way as for building MBTiles files.
import logging
from landez import ImageExporter
logging.basicConfig(level=logging.DEBUG)
ie = ImageExporter(mbtiles_file="yourfile.mbtiles")
ie.export_image(bbox=(-180.0, -90.0, 180.0, 90.0), zoomlevel=3, imagepath="image.png")Convert map tiles to gray scale, more suitable for information overlay :
from landez.filters import GrayScale
ie = ImageExporter()
ie.add_filter(GrayScale())Replace a specific color by transparent pixels (i.e. color to alpha, a-la-Gimp) :
from landez.filters import ColorToAlpha
overlay = TileManager()
overlay.add_filter(ColorToAlpha('#ffffff')) # white will be transparent
ie = ImageExporter()
ie.add_layer(overlay)
...from landez.sources import MBTilesReader
mbreader = MBTilesReader("yourfile.mbtiles")
# Metadata
print mbreader.metadata()
# Zoom levels
print mbreader.zoomlevels()
# Image tile
with open('tile.png', 'wb') as out:
out.write(mbreader.tile(z, x, y))
# UTF-Grid tile
print mbreader.grid(z, x, y, 'callback')from landez import MBTilesBuilder
# From a TMS tile server
# tm = TilesManager(tiles_url="http://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png")
# From a MBTiles file
tm = TilesManager(mbtiles_file="yourfile.mbtiles")
tiles = tm.tileslist(bbox=(-180.0, -90.0, 180.0, 90.0),
zoomlevels=[0, 1])
for tile in tiles:
tilecontent = tm.tile(tile) # download, extract or take from cache
...Cache tiles are stored using TMS scheme by default (with y value flipped). It can be changed to WMTS (a.k.a xyz) :
tm = TilesManager(your_sources_options, cache=True, cache_scheme="wmts")Run tests with nosetests (if you are working in a virtualenv, don't forget to install nose in it!):
cd landez
nosetestsThe Mapnik stylesheet for the test about grid content comes from <https://github.com/springmeyer/gridsforkids>
- Mathieu Leplatre <mathieu.leplatre@makina-corpus.com>
- Sergej Tatarincev
- Éric Bréhault
- Waldemar Osuch
- Isabelle Vallet
- Thanks to mbutil authors <https://github.com/mapbox/mbutil>
- Lesser GNU Public License