GISCafe
   >> GIS User News and Reviews
Thread views: 4577 View all threadsNext thread*

Talbot Brooks
(Unregistered)
06/07/11 01:08 PM
Director, DSU GIT Center Report this article as Inappropriate to us !!!Login to Reply

While NAC is an interesting concept, it is at heart still a mostly proprietary system. Geoaddressing is not a new concept - the military (NATO forces in particular) have used the Military Grid Reference System for such purposes for decades. MGRS and its civilian counterpart, the US National Grid provide a unique advantage over NAC as they permit both point and area referencing based on context sensitive use and permit variable precision and accurary. By way of example a water valve located at a street intersection would be coded as a 10-digit number under normal use circumstances, an apartment would require 8 digits, and something large - say a football stadium - one could make due with either a 4 or 8 digit number. Before I get flamed on this - yes we understand that UTM zone junctions are not nice neat boxes. However, for map users this is not a problem - how a coordinate/geoaddress is read and used is consistently applied. For more information about the US National Grid/MGRS (the difference between the 2 is the datum NAD 83 for USNG, WGS 84 for MGRS - not of significance until sub-meter measurement is required), please visit:
http://www.fgdc.gov/usng <-- note that this is a US standard - the ONLY coordinate system for which such a standard exists.
Regards,
Talbot Brooks
tbrooks@deltastate.edu


Entire thread
SubjectPosted byPosted on
*Universal Geocoding from NAC Assigns Unique Codes to Every L  06/06/11 08:17 AM
.*Director, DSU GIT CenterTalbot Brooks  06/07/11 01:08 PM
.*Not so unique codes after allRick Petrecca  06/06/11 08:17 AM
Jump to

 

Trimble
CADalog.com - Countless CAD add-ons, plug-ins and more.



Internet Business Systems © 2016 Internet Business Systems, Inc.
595 Millich Dr., Suite 216, Campbell, CA 95008
+1 (408)-337-6870 — Contact Us, or visit our other sites:
AECCafe - Architectural Design and Engineering EDACafe - Electronic Design Automation TechJobsCafe - Technical Jobs and Resumes  MCADCafe - Mechanical Design and Engineering ShareCG - Share Computer Graphic (CG) Animation, 3D Art and 3D Models
  Privacy Policy