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.
However, it requires mapnik if the tiles are rendered locally.
sudo aptitude install python-mapnik
And PIL to blend tiles together or export arranged tiles into images.
sudo aptitude install python-imaging
Using 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()
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.reader 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(reader.tile(z, x, y)) # UTF-Grid tile print reader.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 ...
- Mathieu Leplatre <[email protected]>
- Sergej Tatarincev
- Thanks to mbutil authors <https://github.com/mapbox/mbutil>
- Lesser GNU Public License