How do I display latitude / longitude coordinates on the screen?

Question

I am trying to figure out how to draw the WGS84 latitude / longitude points on a bitmap, but cannot determine the math needed to turn the lat / lon points into coordinates that would be plottable. Can someone give me some pointers or examples of how to do this?

thank

Colin

Answer 1

You can watch the Mercator Projection Demo demo with the Delphi source code:

http://delphiforfun.org/programs/MercatorDemo.htm

Answer 2

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Answer 3

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The link here should give some help http://www.uwgb.edu/dutchs/usefuldata/utmformulas.htm

Answer 4

Have you tried the World Coordinate Converter: http://twcc.free.fr ?