How to install landez
- Download and install ActivePython
- Buy and install the Business Edition license from account.activestate.com
- Open Command Prompt
- Type
pypm install landez
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.
INSTALL
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
USAGE
Building MBTiles files
Remote tiles
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>
Local rendering
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()
From an other MBTiles file
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()
From a WMS server
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()
Blend tiles together
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()
Export Images
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")
Add post-processing filters
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) ...
Extract MBTiles content
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')
Manipulate tiles
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 ...
AUTHORS
- Mathieu Leplatre <mathieu.leplatre@makina-corpus.com>
- Sergej Tatarincev
- Éric Bréhault
- Waldemar Osuch
- Thanks to mbutil authors <https://github.com/mapbox/mbutil>
LICENSE
- Lesser GNU Public License
CHANGELOG
2.1.1 (2013-08-27)
- Do not hard-code grid(); JSONP callback.
2.1.0 (2013-08-27)
- Add TMS support (ebrehault)
- Add default subdomains argument for TileSource
- Add ability to set HTTP headers for tiles
- Fix file corruption on Windows (by @osuchw)
2.0.3 (2013-05-03)
- Fix Mapnik signature on render()
2.0.2 (2012-06-21)
- Prevent the whole image to be converted to grayscale
- Explicitly check http status code at tiles download
2.0.1 (2012-05-29)
- Fix infinite loop on blending layers
2.0.0 (2012-05-25)
- Rework cache mechanism
- Jpeg tiles support (#14)
- Remove use of temporary files
- Image post-processing (#11)
2.0.0-alpha (2012-05-23)
- Refactoring of whole stack
1.8.2 (2012-03-27)
- Fix Mapnik rendering
1.8.1 (2012-02-24)
- Fix MBTiles cache cleaning
1.8 (2012-02-24)
- WMS support
- Tiles compositing
1.7 (2012-02-17)
- Catch Sqlite exceptions
1.6 (2012-02-08)
- UTF-Grid support for MBTiles files
1.5 (2011-12-07)
- Subdomain support for tiles servers
- Low level tiles manipulation
- Use i18n
1.4 (2011-10-17)
- Remove extra logging message of mbutil
1.3 (2011-09-23)
- Export set of tiles into single image
1.2 (2011-06-21)
- Raise exception if no tiles in coverages
1.1 (2012-04-18)
- Move internals to landez module
- Split projection into separate module
1.0 (2011-04-18)
- Initial working version