Re: Positional Accuracy

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Stephen Lau (lau++at++Crazypete.AI.SRI.COM)
Tue, 19 Sep 1995 20:49:15 -0700

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>We are flying around a relatively large database that was created from
>DTED data. The database has been translated to its correct lat lon position.
>The problem we have is the X,Y,Z numbers are so large, the image seems
>to jitter eventhough the eyepoint is stationary. I would appreciate any
>existing solutions or workarounds.

We have an application that allows a person wander over a very large
database and our solution is to keep track of the eyepoint but always
draw as though the eye was always at 0,0,0. The polygon vertices are
all offsets from the eyepoint. This eliminates the eye jitter problem
and curvature of the Earth/clipping plane elminates the rest.

Steve

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