On 10/8/13 2:53 AM, Paul Norman wrote: > I'd say the biggest problem is ways that almost overlap and should be > shared, but don't what i'm seeing in the northeast is that county boundaries were brought in from a USGS data set that wasn't particularly accurate, and many places (cities, villages, CDPs, etc) were brought in from TIGER 2005 data which has occasional problems but is mostly much better. the result is when locality boundaries are supposed to line up with county boundaries, well, they don't. the lower Hudson had looked really awful any place there were local and county borders because they weren't even close to the same place
what i've done over the past several months in the counties bordering the lower Hudson Valley (south as far as Orange and Putnam Counties) is as follows: 1) replace county boundaries with boundaries from the 2013 TIGER Shapefiles (initially 2012 Shapefiles, the 2013 files became available while i was working on it. there is not much difference between 2012 and 2013 files) 2) adjust state boundaries where needed 3) add town boundaries from the same shapefiles 4) share border segments that overlap between counties, towns and localities. 5) update the TIGER 2005 places boundaries to 2013 boundaries in cases where i detect that there is a meaningful difference i am now starting in on the counties along the NY/PA border; another NYS mapper is working on counties running out along the Mohawk River. it will take a while to get all this right, but it's moving along and i anticipate we'll get NY done in the fullness of time. at some point i will do Rockland and Westchester Counties, which abut NYC where i know that Serge has done a bit of border repair. PA, NJ and CT appear to need similar attention. VT and MA seemingly are pretty good. haven't looked at the Canadian border recently although it didn't look good the last time i checked it. if it's still bad when we get to the north country, we'll fix it then. i'm not going deep into adjacent states, i'm doing just enough work to settle the state borders down. i needed the PA shapefile for places so i could fix the Matamoras border near Port Jervis, NY; it was the only thing unfixed at that location and it was really annoying me. richard
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