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IMS-33, Landslide Inventory Maps of the Portland quadrangle, Multnomah and Washington Counties, Oregon, by William J. Burns and Serin Duplantis.
(NW, NE, SE, and SW quarter quadrangle plates and overview plate of the Portland 7.5' quadrangle; 1:8,000 scale; 1:16,000 scale overview plate)
Download publication .zip file (264 MB)
IMS-33 contains the four quarter quadrangles that comprise the Portland 7.5' quadrangle, an overview plate that shows all four quarter quadrangles together, a geodatabase, metadata for the GIS files, and a readme.txt file. IMS-33 also contains:
|Special Paper 42, Protocol for inventory mapping of landslide deposits from light detection and ranging (lidar) imagery, by William J. Burns and Ian P. Madin -- included to provide background on how the landslide inventory data were prepared|
|DOGAMI Fact Sheet: "Understanding Landslide Deposit Maps"|
Individual plates (Plates 1-4: 36 x 42 inches; Plate 5: 30 x 42 inches).