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Elevation/IL_Whiteside_DSM_2020 (ImageServer)

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Service Description:

Product: These lidar data are part of a 8 county project in the NorthWest of Illinois. This data are processed Classified LAS 1.4 files, formatted to 14482 individual 1000 meter x 1000 meter tiles; used to create intensity images, 3D breaklines and hydro-flattened DEMs as necessary. Geographic Extent: Jo Daviess, Stephenson, Carroll, Ogle, Whiteside, Lee, Rock Island, and Henry Counties Illinois, covering approximately 5318 square miles. Dataset Description: Illinois 8 county 2019 Lidar Dataset Description: Block 3_IL_8 County, Illinois 2019 Lidar project called for the planning, acquisition, processing and derivative products of lidar data to be collected at a nominal pulse spacing of 0.5 meter. Project specifications are based on the U.S. Geological Survey National Geospatial Program Base Lidar Specification, Version 1.3. The data was developed based on a horizontal projection/datum of NAD83(2011), State Plane Coordinat System Illinois East (FIPS 1201), United States Survey Feet, and a vertical datum of NAVD88 (GEOID12B), US survey feet. Lidar data was delivered as processed Classified LAS 1.4 files, formatted to 37,739 individual 2000 US survey feet x 2000 US survey feet tiles, and 37,738 tiled Intensity Imagery, and 37,739 tiled bare earth DEMs; all tiled to the same 2000 US survey feet x 2000 US survey feet schema. project called for the planning, acquisition, processing and derivative products of lidar data to be collected at a nominal pulse spacing (NPS) of 0.5 meters. Tile 2075_1735 is located within a water body with no reflectance measured within the tile boundary, so no intensity image was produced for that tile. Project specifications are based on the U.S. Geological Survey National Geospatial Program Base Lidar Specification, Version 1.3; Quality Level 2+. The data was developed based on a horizontal projection/datum of NAD83(2011), State Plane Coordinat System Illinois East (FIPS 1201), US survey feet, and a vertical datum of NAVD88 (GEOID12B), US survey feet. Lidar data was delivered as processed Classified LAS 1.4 files, formatted to 37,739 individual 2000 US survey feet x 2000 US survey feet tiles, as tiled Intensity Imagery, and as tiled bare earth DEMs; all tiled to the same 2000 x 2000 US survey feet schema -- ISGS QAQC comments: Almost all of the buildings have been classified as vegetation. These points should be classified as class 1 but was not corrected. There are Erroneous High and Low points found in a North - South swath over the Whiteside and Carroll counties and an East - West strip in Jo Daviess county. There are flight lines that are out of tolerance. -- Ground Conditions: Lidar was collected in late 2019, early 2020 and late 2020 while no snow was on the ground, and rivers levels fluctuated. In order to post process the lidar data to meet task order specifications and meet ASPRS vertical accuracy guidelines, Subcontractor, Surveying and Mapping, LLC (SAM) established a total of 76 ground control points that were used to calibrate the lidar to known ground locations established throughout the Block 3_IL_8 County project area. An additional 219 independent accuracy checkpoints, 127 in Bare Earth and Uraban landcovers (127 NVA points), 92 in tall Grass/tall weeds/crops, Brush lands/short trees, Forested categories (92 VVA points), were used to assess the vertical accuracy of the data. These checkpoints were not used to calibrate or post process the data.



Name: Elevation/IL_Whiteside_DSM_2020

Description:

Single Fused Map Cache: false

Extent: Initial Extent: Full Extent: Pixel Size X: 2.0

Pixel Size Y: 2.0

Band Count: 1

Pixel Type: F32

RasterFunction Infos: {"rasterFunctionInfos": [ { "name": "None", "description": "Make a Raster or Raster Dataset into a Function Raster Dataset.", "help": "" }, { "name": "Color Ramp", "description": "Outputs a rendered raster.", "help": "" }, { "name": "Hillshade", "description": "Generates a grayscale model of a terrain with the sun's relative position taken into account for shading the terrain.", "help": "" } ]}

Mensuration Capabilities: Basic

Has Histograms: true

Has Colormap: false

Has Multi Dimensions : false

Rendering Rule:

Min Scale: 0

Max Scale: 0

Copyright Text: Recommended Publishing Citation: Illinois Height Modernization Program, Illinois State Geological Survey, United States Geological Survey, and Natural Resources Conservation Service, 2002–2022, Illinois LiDAR county database: Illinois State Geological Survey, https://clearinghouse.isgs.illinois.edu/data/elevation/illinois-height-modernization-ilhmp/ (accessed April ,2022)

Service Data Type: esriImageServiceDataTypeGeneric

Min Values: 518.3164672851562

Max Values: 1172.06787109375

Mean Values: 656.5361512160842

Standard Deviation Values: 58.015300146774244

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 Copy: true

Allow Analysis: 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   Statistics   Key Properties   Legend   Raster Function Infos

Supported Operations:   Export Image   Identify   Measure   Compute Histograms   Compute Statistics Histograms   Get Samples   Compute Class Statistics   Query Boundary   Compute Pixel Location   Compute Angles   Validate   Project