geography

Elevation Map

Category Geography
Agency City of Portland
Sub-Agency Technology
Date Released January 1, 2002
Date Updated February 21, 2010
Frequency As needed
Description

Elevation map was created as a by-product of the 2001 digital ortho-rectified imagery, using 5 ft contours. Covers the Portland metropolitan area (511 square miles).

Agency Program City of Portland / Technology
Technical Documentation Elevation Map (metadata)
Keywords

Vegetation

Category Geography
Agency City of Portland
Sub-Agency Technology
Date Released December 16, 2004
Date Updated January 31, 2010
Frequency As needed
Description

Vegetation patches larger than 1/2 acre. Based on information from reference data sources including 6" resolution aerial photos, Parks and Recreation natural area assessments, and vegetation surveys along the banks of the Willamette and Columbia rivers. Vegetation patches area classified as forest, woodland, shrubland, or herbaceous.

Agency Program City of Portland / Technology
Technical Documentation Vegetation (metadata)
Keywords

Ground Slope

Category Geography
Agency City of Portland
Sub-Agency Technology
Date Released February 6, 2010
Date Updated January 31, 2010
Frequency As needed
Description

Ground slope in 5% intervals for Portland, Multnomah County, Washington County, Clackamas County, Oregon.

Agency Program City of Portland / Technology
Technical Documentation Ground Slope (metadata)
Keywords
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