[Proj] Algorithms & Plate Carrée
Noel Zinn (cc)
ndzinn at comcast.net
Sun Jul 22 14:34:15 EST 2012
Your question can be interpreted in many ways and it's not clear to me what
you really mean. But let me address one interpretation, that of
A former colleague of mine used published WGS84 coordinates of airport
runways and VOR/DME all over the world, north and south, east and west, and
picked the ties in Google Earth (because the targets are visible). Most
often the ties were sub 5 meters. Less often they were 15 meters or more.
If the WGS84 registration is of this magnitude, so, too, the UTM.
This is one way of answering your question. Take it for what it's worth.
Noel Zinn, Principal, Hydrometronics LLC
+1-832-539-1472 (office), +1-281-221-0051 (cell)
noel.zinn at hydrometronics.com (email)
From: Irwin Scollar
Sent: Wednesday, July 18, 2012 10:42 AM
To: proj at lists.maptools.org
Subject: [Proj] Algorithms & Plate Carrée
Roughly what order of magnitude of error would there be in N-S and
E-W in coordinates compared to WGS84 UTM in a Google Earth image
showing a 1 kilometer square at middle latitudes and close to the
central UTM meridian, assuming no distortion due to other causes in
the Google Earth image?
Is there a simple way to calculate this for arbitrary lat/lons
between 70 degrees North or South like a Tissot Indicatrice for small areas?
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