For over 80 years, the principal application of photogrammetry has been the compilation of maps from aerial photographs. In recent years, 2006 and 2007, Bradstreet has acquired, controlled and made available nearly 8,000 high resolution, low altitued images of the York and Cumberland County area. These sharp aerial photos have been used to enhance a growing number of occupations including surveying, engineering, archeology, architecture, criminal investigation, law, medicine, and product quality control.