### How to Calculate Scale Factor (in Land Surveying)

A map projection provides a means of representing the curved surface of the earth on a plane surface so that coordinate grids can be defined and maps drawn. The relative positions of points on the grid are altered slightly from their ground positions as a result of using Transverse Mercator Projection to account for the curvature of the earth. The formula for the scale factor is

Scale Factor=Grid Distance/Measured Distance (at MSL)

For example take these two coordinates Read More