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Subject: RE: [emergency] Re: Circle and Polygon
I didn't mean to imply that NATO C2 would be using CAP. I just meant
that the military - having probably the most experience passing
coordinates around - has learned that using one CRS works the best for
passing coordinates. Although developed by the military - it's heavily
used outside the military. The International Civil Aviation Organization
(ICAO) has settled on WGS 84 for air navigation systems see
www.WGS84.com and it's the CRS used by GPS.
http://everything2.com/index.pl?node=WGS%2084
I have seen it happen many times where people "forgot" or didn't realize
their information was in a different reference system. I was just
looking at this as a communication issue. In an emergency situation one
may not have the time to realize there is a miscommunication and go back
and fix it.
I agree we need to get the opinions of users - we should also include
some geodesist. I certainly don't know all the uses for CAP. It may very
well be used for high precision positioning where a local system may
work the best - we'll have to see what the users want.
Dave
David M. Danko
GIS Standards
Environmental Systems Research Institute, Inc.
8620 Westwood Center Drive
Vienna, VA 22182-2214
USA
E-mail: ddanko@esri.com
Tel: 703-506-9515 x 8011
Mobile: 703-989-1863
Fax: 703-506 9514