[OSM-talk] Correcting DOT bridge coordinates
Simon (Vsevolod) Ilyushchenko
simonf at simonf.com
Fri Oct 3 09:29:44 BST 2008
I have taken US DOT bridge condition appraisal data and created a
regionated KML visualization: see post at
http://www.thedaysarenumbered.com . However, almost all bridges are
not geolocated correctly. I wonder if someone can recommend a way to
use OpenStreetMap to edit the bridge information so that, on one hand,
the bridges are added to the map if they are not there already,
and on the other hand, so that the corrected bridge coordinates could
be extracted and given back to DOT (as a way of saying thank you)?
I got somewhat contradictory advice on IRC. So far I gathered that
it's technically possible to just import the 180k entries into the
base layer (the total bridge count is actually 700k, I'm just showing
the lowest quartile). However, connecting the uploaded bridges to the
real ones (if those are present) may not happen for a while, so the
map will become littered. Automatically matching the bridges will
hardly work in most cases. I'd prefer to add bridges to a hidden layer
first and only push them to the base layer once data are verified.
BTW, I was pleasantly surprised when the OSM California road dataset
proved to be much better than the one the state of California provides.
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