IMS-26, Landslide inventory map of the northwest quarter of the Oregon City quadrangle, Clackamas County, Oregon by William J. Burns and Ian P. Madin, 2009, scale 1:8,000. Publication package includes 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.