Hello Miha,

However, a problem arises with surveying networks that have a local surveying date. It is only possible for geodetic networks that are in the global coordinate system or in an individual national coordinate system.

Well, to plot the points, one has to "transform" each position to pixel coordinates. If such relation is known, one can also plot local networks; e.g. by specifying 3,4,5,.. homologous points in the image. I think, the (or my!) problem is not the mathematics but to provide an user-interface.

regards
Micha