Converting Longitude & Latitude to X Y on a map with Calibration points

Question

If i have a jpeg map with size sizeX, sizeY

and some calibration points on the map (X, Y, Lon, Lat)

What would be the algorithm for calculating the correspon

Answer 1

There are many different map projection schemes. You would have to know which one(s) are used by your maps.

For more information about map projection algorithms and forward/reverse mapping check out this link. It provides the formulas for a number of common projections.