1. A method of determining whether a physical target object in a designated area is within a specified three-dimensional area, the method comprising: loading a map of the area including specified three-dimensional surface data of the three-dimensional area on a mobile device; electronically determining a geographic position of the mobile device; determining a geographic position of the target object by observation of the physical target object and recording the position of the target object; and comparing the geographic position of the target object to the loaded map to determine whether the target object is within the specified three-dimensional area.