Description: Tsunami hazard data are made chiefly for emergency management planning and for land-use planning. These data are in part created by the National Tsunami Hazard Mitigation Program, Federal Emergency Managment Agency, and the State of Washington.
Description: The digital maps presented here were originally published as hard copy maps in the Coastal Zone Atlas of Washington between 1978 and 1980. Although the Atlas has been out of print for many years, the maps contain information that remain the basis for local planning decisions. After receiving multiple requests for electronic versions of portions of the Atlas, an effort was made to scan, georeference and digitize aspects of the Atlas, beginning with the slope stability maps. These maps indicate the relative stability of coastal slopes as interpreted by geologists based on aerial photographs, geological mapping, topography, and field observations. Such methods are standard, but may occasionally result in some unstable areas being overlooked and in some stable areas being incorrectly identified as unstable. Further inaccuracies are introduced to the data through the process of converting the published maps into digital format. Important land use or building decisions should always be based on detailed geotechnical investigations. This mapping represents conditions observed in the early and mid-1970s. Shorelines and steep slopes are dynamic areas and many landslides have occurred since that time that are not reflected on these maps. Subsequent human activities may have increased or decreased the stability of some areas.
Copyright Text: Washington State Department of Ecology, Shorelands and Coastal Zone Management Program
Description: The data is intended to help assess patterns of land cover at a variety of scales. The polygons represent areas which have similar land cover type. Landcover information was derived from 3ft NAIP imagery flown during leaf-on seasons. This dataset is still in Beta. What that means is that the tree, water, and gravel (streambed) classes are quite reliable; the built (impervious), ground, and low vegetation (grasses and shrubs) land cover classes tend to get mixed in with each other. Each WRIA/county varies in accuracy - the user needs to visually inspect a few areas to confirm the needed classes are still of use with the current accuracy. We are constantly improving the landcover accuracy with new versions. If you would like to be informed when new data is available for your area, email HRCD@dfw.wa.govData have been created for areas in Washington as funding allows: visit https://hrcd-wdfw.hub.arcgis.com/ for information on past and current funding sources.
Copyright Text: Washington Department of Fish and Wildlife