Frank, since we use this information simply as a grid for assigning
location attributes and aggregating exposure data, I keep no metadata as
to where the lines and nodes come from.
When I first go this data, it was from the University of Florida. They
told me they got it from the various water management districts.
Some simple queries on the data when I first got it showed that there
were some errors in the naming of the Sections, Townships and Ranges
(for instance, a range of "E" that was all alone, far away from the "W"
side of the meridian; section numbers that were repeated or out of
sequence). These were fixed.
On the paperwork we send our insureds, the PLSS is printed on the
declarations. We started getting some complaints from insureds that our
PLSS info did not match their tax records, so we check them out.
Sometimes this is due to imprecise geocoding, sometimes the geocode
seems to be correct, but the road line network does not match up with
our aerial photography (free! from http://labins.org).
Sometimes everything would be right, but the PLSS line would be wrong.
Then we would check with the local county property appraiser GIS office
(who should have the best line work in the county) and get a copy of
their PLSS data, and move some nodes around to match their data.
Note: If anyone gets this data, there are no warranties expressed or
implied as to accuracy or suitability for your particular purposes. This
is simply nerds helping other nerds.
Hope this helps,
-- Steve
________________________________
From: Frank Aaron (TX/EUS) [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, March 28, 2006 11:49 AM
To: Wallace, Steve
Subject: RE: [MI-L] Township, Range & Section Data - Florida or US
Hi Steve,
I would not mind receiving a copy of your database - must have taken
some diligence and hard work to track down all of the source data and
then perform a comparison to identify the elements to make up the
database. Would you happen to have a list of the data sources that
eventually wound up choosing as the final source? Thanks in advance,
Frank Aaron
________________________________
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]] On Behalf Of Wallace,
Steve
Sent: Tuesday, March 28, 2006 10:40 AM
To: Ryan Morgan; mapinfo-l@lists.directionsmag.com
Subject: RE: [MI-L] Township, Range & Section Data - Florida or US
Ron:
Let me zip my copy and send it to you. If anyone else wants it, just let
me know off-list.
This was from several sources, and over a period of 12 years or so, I
keep making corrections and refinements to it as I get newer
county-level data.
Steve Wallace
Florida Farm Bureau Insurance Companies
________________________________
From: Ryan Morgan [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, March 28, 2006 11:16 AM
To: mapinfo-l@lists.directionsmag.com
Subject: [MI-L] Township, Range & Section Data - Florida or US
Does anyone know a good resource for Township, Range and Section Data?
Specifically, I'm looking for Florida, but a nation-wide resource would
be good for the long-run.
Thanks in advance!
Ryan Morgan
Aerials Express
www.aerials-express.com
_______________________________________________ MapInfo-L mailing list MapInfo-L@lists.directionsmag.com http://www.directionsmag.com/mailman/listinfo/mapinfo-l
