On Jul 28, 2016 6:14 PM, "Clifford Snow" <cliff...@snowandsnow.us> wrote: > While property lines don't belong in OSM, they can be useful. Having parcel boundaries can be useful to figure out the address of a building. Especially if you can get access to the property, i.e. the owner has no trespassing signs posted. Other tools such as QGIS and PostGIS come in handy for getting your data ready for import.
Property lines also define the bounds of public areas like parks, schoolyards, cemeteries, and airfields, which surely do belong in OSM. They aren't infallible, but they are often more precise than guessing from orthophotos. This has to be considered intermediate to advanced mapping, since these features typically result from combining multiple lots, which are often still separate in the tax rolls. Moreover, use of the property by multiple agencies may have multiple land uses for a single tax parcel. Still, it's a pretty good starting point. Even the fact that the tax rolls identify a parcel as belonging to a government agency is an indication that there is likely to be a mappable feature there.
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