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City
of Oakland, CA (2003)
HJW was selected to generate orthophotos and a digital terrain
model for the entire city of Oakland. HJW acquired color photography
at a photo scale of 1:6000 (1”=500’). The photography
was captured using our Cessna 206 aircraft, which is equipped
with a GPS/IMU direct orientation and positioning system. The
film was scanned at a resolution of 12.5 microns (2032 dpi) for
the production of color orthophotos with 0.25’ pixel size.
Orthophotos met the accuracy specifications of 1”= 40’
mapping. Contours were compiled with 2’ intervals in the
designated lowlands, and 5’ intervals in the highlands. |
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