[Talk-ca] Open Source Software Road Matcher
John Peterson
jdp at ix.netcom.com
Sat Jan 24 00:21:02 GMT 2009
I'm also using stock Roadmatcher for findng standalone ways. I followed the
link you posted back then.
Roadmatcher seems to need different settings for towns than for countryside
to do the best job.
Here's a sample of standalone roads near Port Stanley Ontario
040I11_standalone.osm.gz http://www.mediafire.com/?gwf755nfwxn
I used
findStandaloneRoads True
minimumLineSegmentLength 1.0
nearnessTolerance 10.00
minimumDistnace 0.0010
findMatchedRoads false
My files are created by geobase2osm.py with a bounding rectangle
homebrew AbInitio script [a proprietary ETL program] to download the same
area from osm, and make osm.jml geobase.jml.
roadmatcher.bat and exportresult.bat from stock Roadmatcher
homebrew AbInitio script including shp2text to get nrn_id and srcstate
which is used to filter out nodes and ways from the original geobase.osm
file.
I notice that short streets at right angles to existing streets are missing
from my standalone file. Some county roads and a stretch of 401 are
duplicated. It looks pretty easy to clean up and stitch together.
I too am looking for ideas to help with the larger problem of applying
nrn_id to the rather-well-populated Ontario map.
John Peterson
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