All mapping and ortho-photomosaic production requires some degree of ground survey data to control the registration of the imagery and mapping. Historically, this data has been obtained by sending expensive and time-consuming survey crews into the field to gather all latitude and longitude coordinate data for control points. Aero-Data, however, uses Airborne GPS surveying during aerial photographic flights. This allows us to gather true ground coordinate information for ortho-image registration at the exact time that each photograph is taken. Since Airborne GPS can be extremely accurate, the need for costly ground survey teams can greatly be reduced or even elimintated. Since Airborne GPS decreases the amount of surveyed ground control, total project costs can be significantly reduced. Depending upon the degree of accuracy required, however, some surveying may still be needed.