{
 "culture": "en-US",
 "name": "BareEarthDTM2021_DNR",
 "guid": "",
 "catalogPath": "",
 "snippet": "Provide high resolution terrain elevation data from the Thurston County dataset.",
 "description": "<DIV STYLE=\"text-align:Left;\"><DIV><P><SPAN>The hydroflattened bare earth digital elevation model (DEM) represents the earth's surface with all vegetation and anthropogenic features removed. It is derived from NIR lidar data using TIN processing of the ground point returns. All rivers greater than 30 meters in width and lakes at least 150 square meters in size have been flattened to consistent elevations. Water boundary polygons were developed using an algorithm which weights Lidar-derived slopes, intensities, and return densities to detect the water's edge. Elevation values were then assigned to the water's edge from the Lidar data creating 3D breaklines enforced during model creation to flatten water bodies. Some elevation values have been interpolated across areas in the ground model where there is no elevation data (e.g. under dense vegetation). Data was processed in reference to NAD83 (CORS96), however the horizontal datum for this dataset is defined as NAD83 (HARN) as the difference is generally small and allows for greater ease of use with data in different datums. The vertical datum is NAVD88, Geoid 03, and the data is projected in Washington State Plane South. Units are in US Survey Feet. NV5 Geospatial collected the Thurston County Lidar data for Washington Department of Natural Resources between 03/27/2021 and 04/03/2021.<\/SPAN><\/P><\/DIV><\/DIV>",
 "summary": "Provide high resolution terrain elevation data from the Thurston County dataset.",
 "title": "BareEarthDTM",
 "tags": [
  "lidar",
  "Light Detection and Ranging",
  "elevation data",
  "topography",
  "bare earth",
  "hydroflattened",
  "breaklines",
  "DEM",
  "digital elevation model",
  "Washington",
  "Nisqually River",
  "Nisqually Reach",
  "Puget Sound",
  "Capitol State Forest",
  "Alder Lake",
  "Yelm",
  "Lacey",
  "Olympia",
  "R"
 ],
 "type": "Image Service",
 "typeKeywords": [
  "Data",
  "Service",
  "Image Service",
  "ArcGIS Server"
 ],
 "thumbnail": "thumbnail/thumbnail.JPEG",
 "url": "https://mapping.co.thurston.wa.us/imgserver/services/LiDAR/BareEarthDTM2021_DNR/ImageServer",
 "spatialReference": "NAD_1983_StatePlane_Washington_South_FIPS_4602_Feet",
 "accessInformation": "Washington Department of Natural Resources",
 "licenseInfo": "<DIV STYLE=\"text-align:Left;\"><DIV><P><SPAN>In some areas of heavy vegetation or forest cover, there may be relatively few ground points in the lidar data. TINing the points produces large triangles and hence the elevations may be less accurate within such areas. Elevation values for open water surfaces are derived from waters edge breaklines. Triangles were created across water surfaces by interpolating from the nearest breakline elevation points.<\/SPAN><\/P><\/DIV><\/DIV>",
 "MinScale": 1.5E8,
 "MaxScale": 5000.0
}