US Patent 10521943 Lot planning

A facility for computing a combined view that superimposes a graphic image representing lots onto a reference map is described. The facility identifies a set of distinguishing features in the graphic image and a set of distinguishing features in the reference map. These sets are used to compute a set of common distinguishing features using various techniques, such a cross-referencing. The facility then computes a combined view of the graphic image of lots and the reference map using the set of common distinguishing features. The facility further determines geographic coordinates of location markers on the graphic image scaled to the reference map.