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The hillshade is a greyscale image showing topography in the landscape. In this case it is created from a LiDAR derived <\/span>hydro-flattened <\/span>bare earth digital elevation model illuminated by hypothetical light source shining from the north west. A <\/span>hydro flattened <\/span>bare earth digital elevation model (DEM) represents the earth's surface with all vegetation and human-made structures removed. In addition bodies of waters 2acres or larger have been smoothed.<\/span><\/p>

The DEM used to create this hillshade is described as a bare earth digital elevation model (DEM) representing the earth's surface with all vegetation and human-made structures removed. The bare earth DEMs were derived from LiDAR data using triangulated irregular network (TIN) processing of the ground point returns. Each image corresponds to a 37,800-square-foot tile. Each pixel is 3 feet and represents an average elevation for that area.<\/span><\/p><\/div>", "name": "Rasters/Lidar_HydroFlat_BareEarth_HS_2013_WM", "description": "", "extent": { "xmin": -1.3755196730571218E7, "ymin": 4591705.376963831, "xmax": -1.3605983888268521E7, "ymax": 4770843.017248876, "spatialReference": { "wkid": 102100, "latestWkid": 3857 } }, "initialExtent": { "xmin": -1.3755196730571218E7, "ymin": 4591705.376963831, "xmax": -1.3605983888268521E7, "ymax": 4770843.017248876, "spatialReference": { "wkid": 102100, "latestWkid": 3857 } }, "fullExtent": { "xmin": -1.3755196730571218E7, "ymin": 4591705.376963831, "xmax": -1.3605983888268521E7, "ymax": 4770843.017248876, "spatialReference": { "wkid": 102100, "latestWkid": 3857 } }, "hasMultidimensions": false, "pixelSizeX": 0.2985821416476169, "pixelSizeY": 0.2985821416476168, "datasetFormat": "AFR", "uncompressedSize": 899468130771, "blockWidth": 256, "blockHeight": 256, "compressionType": "None", "bandNames": [ "Band_1", "Band_2", "Band_3" ], "allowCopy": true, "allowAnalysis": true, "bandCount": 3, "pixelType": "U8", "minPixelSize": 0, "maxPixelSize": 0, "copyrightText": "Sonoma County Vegetation Mapping and LiDAR Consortium, NASA, University of Maryland, Watershed Sciences, Inc., Tukman Geospatial LLC", "serviceDataType": "esriImageServiceDataTypeRGB", "serviceSourceType": "esriImageServiceSourceTypeDataset", "minValues": [], "maxValues": [], "meanValues": [], "stdvValues": [], "objectIdField": "", "fields": [], "capabilities": "Mensuration,Image,Metadata", "defaultMosaicMethod": "Center", "allowedMosaicMethods": "", "sortField": "", "sortValue": null, "sortAscending": true, "mosaicOperator": "First", "defaultCompressionQuality": 75, "defaultResamplingMethod": "Bilinear", "maxImageHeight": 4100, "maxImageWidth": 15000, "allowRasterFunction": true, "rasterFunctionInfos": [ { "name": "None", "description": "", "help": "" } ], "rasterTypeInfos": [ { "name": "Raster Dataset", "description": "Supports all ArcGIS Raster Datasets", "help": "" } ], "mensurationCapabilities": "Basic", "hasHistograms": false, "hasColormap": false, "hasRasterAttributeTable": false, "minScale": 0, "maxScale": 0, "exportTilesAllowed": false, "supportsStatistics": false, "supportsAdvancedQueries": false, "editFieldsInfo": null, "ownershipBasedAccessControlForRasters": null, "allowComputeTiePoints": false, "useStandardizedQueries": true, "advancedQueryCapabilities": { "useStandardizedQueries": true, "supportsStatistics": false, "supportsOrderBy": false, "supportsDistinct": false, "supportsPagination": false }, "spatialReference": { "wkid": 102100, "latestWkid": 3857 } }