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Martin Kolman f469a0fe2a use sqlite to store node lookup table While parsing the OSM XML file, we first need to index all the nodes, so that when parsing the ways we can assign geographic coordinates to all points that comprise a way. As there might be millions of nodes, they can often not be all stored in memory - so we use sqlite database with an index built on the id column for fast node lookup. Like this, it should be possible to parse very big OSM data files with acceptable memory usage. During my testing on the Czech Republic OSM data file, I got from 9.7 GB with the old in-memory node dictionary down to about 3.5 GB (which is strange in itself - it should still be much less).	2012-10-16 22:18:12 +02:00
src	use sqlite to store node lookup table	2012-10-16 22:18:12 +02:00
.hgignore	Changeable vector backends.	2010-05-02 00:18:15 +03:00
README	Update README	2012-10-16 14:07:30 +03:00

Martin Kolman f469a0fe2a use sqlite to store node lookup table

While parsing the OSM XML file, we first need to index all the nodes, so that when parsing the ways we can assign geographic coordinates to all points that comprise a way. As there might be millions of nodes, they can often not be all stored in memory - so we use sqlite database with an index built on the id column for fast node lookup. Like this, it should be possible to parse very big OSM data files with acceptable memory usage.

 During my testing on the Czech Republic OSM data file, I got from 9.7 GB with the old in-memory node dictionary down to about 3.5 GB (which is strange in itself - it should still be much less).

2012-10-16 22:18:12 +02:00

src

use sqlite to store node lookup table

2012-10-16 22:18:12 +02:00

.hgignore

Changeable vector backends.

2010-05-02 00:18:15 +03:00

README

Update README

2012-10-16 14:07:30 +03:00

README

   Kothic  Map Renderer
   
   Depends:
   1. tWMS http://twms.googlecode.com/
     symlink twms directory into src/
   2. python-lxml
   3. python-psyco, if available.
   4. pygtk for GUI
   5. pycairo
   6. python-psycopg2
   7. python-shapely
   8. python-pyproj

   To run:
   1. Install all dependancies.
   2. cd src/
   3. cat small_test_osm_dump.osm | python osm2tiles.py
   4. wait a bit and check if tiles got generated
   5. python kothic.py to run GUI

   NOT READY FOR DAILY USAGE!