Bill Ricker <bill.n1...@gmail.com> writes: > On Fri, Sep 23, 2016 at 2:27 PM, Spencer Gardner > <spencergard...@gmail.com> wrote: >> Is anyone on here familiar with the process that was used to upload MassGIS >> road data for the state of Massachusetts? I'm noticing a lot of incorrect >> lane information on one-way residential streets and wondering if the bulk >> import process could be the cause. I'd love to hear if anyone else has come >> across this. > > Not intimately knowledgeable here, but aware. I recall there was > widespread problem with one-way streets because the import was > inconsistent in one-way polarity. Those are i hope mostly fixed by > now. I don't recall discussion of lanes, though.
A nit: asq I understand it, the road data is maintained by MassDOT (formerly > EOT, Executive Office of Transportation), and made available by MassGIS: http://www.mass.gov/anf/research-and-tech/it-serv-and-support/application-serv/office-of-geographic-information-massgis/datalayers/eotroads.html The one-way issue was due to a belief at the time that the EOT/MassGIS dataset had information about whether a road was oneway but not the direction, because the direction was somehow proprietary data from some external provider. As a result the one-way roads had a FIXME and have largely been corrected. > My own street is similar, one-way and we have 1 travel lane plus both > side parking in reality and it's coded as lanes = 2. I am unclear on lanes. It would help to analyze a significant number (10-25?) of roads, comparing what's in OSM to reality and also what's in the latest state data. There could be differences in definition of what's a travel lane vs parking between OSM and MassDOT. https://wiki.openstreetmap.org/wiki/Key:lanes Definitely at the time, and arguably still, the EOT/MassGIS road data was vastly better than TIGER. The geometry is excellent, and road naming is very accurate -- I've only found one or two errors. If there is some pervasive issue with lanes, a mechanical edit could make sense. But I would like to tread carefully there. I've added talk-us-massachusetts which is probably more appropriate for the details.
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