Yes, I posted that yeasterday.
http://beerleg.com/index.php?mode=thread&id=176013
Quite amazed at no responce whatsoever from this croud.
Would it not be great if a group such as this could all agree to use a common 3-D model for working with spatial data? The 3-D global spatial data model (GSDM) is well-defined, already in place, and accommodates 3-D digital spatial data for all disciplines all over the world without scale factors, elevation factors, zone constants, or convergence. The GSDM provides the local ground level distance between points referenced to the true meridian. See Global COGO, Inc. web site.. The stochastic portion of the GSDM also provides an efficient way to establish, track, and using standard deviations to describe the quality of the data. Yes, we can have our cake and eat it too.
Thank you TP
Cheers
Derek
RE: National Land Parcel Data: A Vision for the Future
> Yes, I posted that yeasterday.
>
>> http://beerleg.com/index.php?mode=thread&id=176013
>
> Quite amazed at no responce whatsoever from this croud.
No sarcasm here: I would love to be sold on this. It makes the nerd in me happy to have a national parcel network.
But... I can think of all sorts of reasons why it really doesn't make a lot of difference:
1. Here in WA, all of our parcels are already Geo-referenced since the 1800's.
2. Boundary law doesn't seem to base boundaries on coordinates, they are based on relationships to monuments on and in the ground. (Our Geo-referenced system from the 1800's is tied to errorless monuments on the ground.)
3. In my experience, when a city asks for a tie into NAD83/91(xxxx), what they end up really asking for is a tie into their own realization of NAD83/91 as it relates to their monuments. This is just how a moving earth works. Any coordinate that is not 4-D is not really Geo-referenced, and I think that might be a little extreme to work up for a corner for a parcel + house worth $300k.
4. Are we going to change hundreds of years of law to hold math over monuments?
5. Where in the "National Land Parcel Data: A Vision for the Future" publication does it spell out how we are getting Joe Homeowner to pay for these costs?