At 01:11 AM 5/25/02 -0700, jayachandran mani wrote: >1. What is the difference between projection and >DATUM.
For a quick, illustrated, no-nonsense explanation, please see "reprojecting geographic features" at http://www.directionsmag.com/article.php?article_id=75 .
>2. What will be the difference in horizontal >co-ordinates as the height changes.
None.
--Bill Huber Quantitative Decisions
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