[OSM-dev] TIGER conversion ruby scripts (v0.4)

[Dave Hansen]

Changes from 0.3:
 - Fixed lots of ways getting dropped (I was too aggressively reclaiming
   objects that I thought I was done using)
 - I used to keep hashes of arrays of ways with each name and tried to
   find ways to glob together by searching.  Trying to combine two ways
   together turned out to be one of the CPU dominating parts.  Now, it
   indexes all ways by starting and ending node.  Much more efficient
   to find ways to join together.
 - started including some tiger identifiers in the Node tags.  This
   should let us use the tiger data at a later date to add addressing
   information.

Using the name-indexed method.
   combine_fail: 956461
combine_success: 2612

Using the start/end node in a way method:
   combine_fail: 6181
combine_success: 2669

If JOSM complains about running out of memory, increase the Java heap
size by running it like this:

        java -Xmx1024M -jar josm-latest.jar tiger-file.osm.xml

See the README for detailed instructions.

http://sr71.net/~dave/osm/tiger/tiger-to-osm-0.4.tar.gz

-- Dave