A new map poster is available titled Folds and Fossils of the Chuckanut Formation in Northwestern Washington.
It’s finally here! You can now view lidar imagery in our Geology Portal. We’ve added mosaics of both bare-earth and top surface lidar hillshades to the list of available base layers. What’s a Lidar Hillshade? Lidar hillshades are renderings of the lidar elevation model using simulated illumination. Bare-earth lidar shows only the ground surface (trees, vegetation, […]
The Washington Geological Survey is pleased to announce a new publication that explains the detailed protocol that Survey geologists are using to systematically map landslides using lidar. This protocol closely follows the methods used by Oregon Department of Geology and Mineral Industries to map landslides in Oregon. The objective of the protocol is to establish standardized methods for […]
A new map poster is available titled The Cheney–Palouse Tract of Washington’s Channeled Scablands. Using elevation data, it highlights a remote portion of the Eastern Washington landscape shaped by catastrophic ice-age floods. During the last ice age, a lobe of the Cordilleran Ice Sheet formed an ice dam that blocked a major valley in what […]
New LiDAR product available! This imagery shows floodplain details from five rivers on the outer Olympic Peninsula—the Quinault, Queets, Hoh, Bogachiel/Quillayute, and Sol Duc. The headwaters of these rivers begin in melting snowfields and glaciers of the Olympic Mountains. They then flow through a region of dense temperate rainforest and westward to the Pacific Ocean. […]
This winter and spring have witnessed a flurry of LiDAR-(light detection and ranging) related activity at the Division of Geology and Earth Resources (DGER) as the new LiDAR program begins to take shape. The ongoing collection of new aerial LiDAR data in western Washington will ultimately serve as the foundation data for mapping, geologic hazard mitigation, […]