Hi, How to solve this problem?
1. I measure a square on the ground. 2. I take latitude and longitude of all four corners with a precision-GPS. 3. I have succeded in making a map where the four corners are marked and the coordinates are along the sides of the A4-paper. 4. The problem is that the square has been transformed to a rectangle because of the latitude shortening. Is there a solution to multiplay only the longitude by 1/cos(latitude) to get back the square? (I understand that 1/cos(latitude) is only valid for a sphere (not spheroid) but I do not know a better formula. The latitude is 60 deg.) Regards Christer Sweden
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