Openmap displays the tip of South Head of Sydney Harbour on the VMAP
coastline at 33:51.734S 151:16.672E.
On the same Openmap display, the position of the DTED data corresponding
to the same point is 33:49.944S 151:16.876E (recognizing that the DTED
data is more detailed and so the corresponding points are approximate).
This equates to a difference of approximately 1.8 minutes South. An
independent check puts the equivalent DTED position at 33:50.102S
151:16.960E which confirms that the DTED position is correct. The VMAP
display was then checked using VPFview2.1 which located the same point at
33:50.412S 151:16.665E. This corresponds better with the DTED data and
confirms that the source VMAP data is correct.
This shows that Openmap is displaying the VMAP data with a displacement of
1.3 minutes South from the DTED data, which is a mix DTED Level 1 and
Level 0.
We are using OpenMap 4.6.5.
Any suggestions on how to get the images to align better?
Tony Vasile
Senior Software Engineer
CSC
Level 3B, 26 Talavera Road Macquarie Park NSW 2113 Australia
GBS | p: +61 2 9034 2404 | f: +61 2 9034 2398 | avasile_at_csc.com |
www.csc.com
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Received on Thu Feb 23 2012 - 23:09:07 EST