Quote:
Originally Posted by ridetheworld
Could you tell me how do you change to different formats and what are they called?
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If you want a quick and easy way to change notation from HH:MM:SS to decimal and vice-versa, go to this website:
Degrees/Minutes/Seconds to/from Decimal Latitude/Longitude
You could also do your own conversions using high school math (to convert from base 60 to base 10), but that is prone to error...
Just as an aside, for sake of interest, if you look closely at that website, you will see that mention is made of two different datums, one being WGS 84 and the other being NAD 83 (North American Datum 1983). The maximum difference possible between those two datums is 2 millimeters, which is why NAD 83 is still found in use today (primarily in Canadian aviation cartography). Two millimeters doesn't matter to anyone except land surveyors.
But, I stress, you can completely ignore the concept of datum, unless you are using very old maps from very strange places.
Michael
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