San Francisco, CA (2001)

In 2001, HJW provided color digital orthophotography for the entire City of San Francisco. Photography was flown at a scale of 1:6600 (1”= 550’). Contour mapping was compiled at 5’ intervals, and used to create the digital terrain model. Images were scanned at a resolution of 10 microns (2540 dpi) for the production of 0.25’ pixel orthophotos.

Prior to this project, in 1991, HJW generated orthophotos at 0.25’ pixel size for San Francisco. For this project, photography was flown at both 1:6600 (1”= 550’) and 1:12,000 (1”= 1000’) scales.

“The high caliber of the orthophotos has enabled us to produce, with confidence, a top quality basemap”
George White, Program Director,
City of San Francisco