ekubaskie
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 Posted:
Thu Dec 16, 2004 6:32 am Post subject:
Re: Inputting Points Using Lattitude and Longitude |
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Likewise - once you get the idea, Map starts to make sense!
It would be a bit of work without Map - the conversion from lat, long to state plane or UTM is not a simple formula. The problem is made even worse by the differences in datum. Then there are different formulae for dealing with NAD27, NAD83, or WGS84 (GPS) for lat-longs, and 27 or 83 for state plane or UTM, as well as feet or meters. All of this is already figured in with Map once a drawing's system is set.
Here in Anchorage, Alaska the difference between NAD27 and NAD83/WGS84 is about 450 feet. I spent a half-hour this morning explaining that to an engineer from another firm when they plotted a series of wind-generator towers out in the ocean instead of atop the bluff.
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