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Elevation/IL_Rock_Island_DSM_2009 (ImageServer)

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Service Description:

This Digital Surface Model (DSM) data was produced all or in part from LiDAR information as of 2009. The LiDAR derived DSM covers Rock Island County, Illinois and include inland streams, rivers, lakes ponds and tidal features. These data are appropriate for use in local and regional analysis. This data was updated in 2013 from its original format to LAS version 1.2. The LiDAR data is updated to be more compatible within the guidelines of the National Digital Elevation Program. (NDEP). This data set has a vertical accuracy of 7.01 centimeters RMSEz, horizontal accuracy of 0.27 meters and point spacing of1.0 meters. Digital Elevation Models (including terrain and surface models) are raster data sets created from whole LiDAR point cloud data sets (LAS files). The LAS files are the standard LiDAR file format which contains the raw point cloud data, these data are normally classified and distinguished between points on the ground, water or elevated features such as buildings, trees, towers, bridges, etc.. These LAS files are processed into elevation models to create gridded rasters. The first returns can be used to map the top reflective surface (Digital Surface Models - DSM), these normally include open terrain areas, as well as the tops of buildings, trees, towers, and other features elevated above the bare earth. The last returns are used to map the bare-earth terrain (Digital Terrain Models - DTM), these are normally produced with irregularly-spaced points rather than the uniform grid structure of a Digital Elevation Model (DEM), Digital Terrain Models will often include breaklines to help define edges of water bodies.



Name: Elevation/IL_Rock_Island_DSM_2009

Description:

This Digital Surface Model (DSM) data was produced all or in part from LiDAR information as of 2009. The LiDAR derived DSM covers Rock Island County, Illinois and include inland streams, rivers, lakes ponds and tidal features. These data are appropriate for use in local and regional analysis. This data was updated in 2013 from its original format to LAS version 1.2. The LiDAR data is updated to be more compatible within the guidelines of the National Digital Elevation Program. (NDEP). This data set has a vertical accuracy of 7.01 centimeters RMSEz, horizontal accuracy of 0.27 meters and point spacing of1.0 meters. Digital Elevation Models (including terrain and surface models) are raster data sets created from whole LiDAR point cloud data sets (LAS files). The LAS files are the standard LiDAR file format which contains the raw point cloud data, these data are normally classified and distinguished between points on the ground, water or elevated features such as buildings, trees, towers, bridges, etc.. These LAS files are processed into elevation models to create gridded rasters. The first returns can be used to map the top reflective surface (Digital Surface Models - DSM), these normally include open terrain areas, as well as the tops of buildings, trees, towers, and other features elevated above the bare earth. The last returns are used to map the bare-earth terrain (Digital Terrain Models - DTM), these are normally produced with irregularly-spaced points rather than the uniform grid structure of a Digital Elevation Model (DEM), Digital Terrain Models will often include breaklines to help define edges of water bodies.



Single Fused Map Cache: false

Extent: Initial Extent: Full Extent: Pixel Size X: 3.5

Pixel Size Y: 3.5

Band Count: 1

Pixel Type: F32

RasterFunction Infos: {"name":"None","description":"","help":""}

Mensuration Capabilities: Basic

Has Histograms: true

Has Colormap: false

Has Multi Dimensions : false

Rendering Rule:

Min Scale: 0

Max Scale: 0

Copyright Text: Quantum Spatial Inc. (formerly Aero Metric Inc.), Illinois State Geological Survey, Illinois Department of Transportation

Service Data Type: esriImageServiceDataTypeGeneric

Min Values: -66.45726013183594

Max Values: 3604.71875

Mean Values: 670.1899525051537

Standard Deviation Values: 78.22442566204963

Object ID Field:

Fields: None

Default Mosaic Method: Center

Allowed Mosaic Methods:

SortField:

SortValue: null

Mosaic Operator: First

Default Compression Quality: 75

Default Resampling Method: Bicubic

Max Record Count: null

Max Image Height: 4100

Max Image Width: 15000

Max Download Image Count: null

Max Mosaic Image Count: null

Allow Raster Function: true

Allow Compute TiePoints: false

Supports Statistics: false

Supports Advanced Queries: false

Use StandardizedQueries: true

Raster Type Infos: Has Raster Attribute Table: false

Edit Fields Info: null

Ownership Based AccessControl For Rasters: null

Child Resources:   Info   Histograms   Key Properties   Legend   MultiDimensionalInfo   rasterFunctionInfos

Supported Operations:   Export Image   Identify   Measure   Compute Histograms   Compute Statistics Histograms   Get Samples   Compute Class Statistics