Which parts of the problem have you completed, and which parts are causing you difficulty?
1. Interpreting the data message (such as NMEA) from the GPS receiver?
2. The mathematics required to compute the area of a triangle? Are the points far apart so you must consider the curvature of the Earth?
3. Translating the mathematics into a program?
4. Something else?
For within 100km you may assume plane and find the distance between the points. remember you have to use cos(latitude) to apply correction for longitude. Then u may use tha
sqrt(s*(s-a)*(s-b)*(s-c)) s is the semi perimeter.
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