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Service Description: A wetness index is based on the idea that a terrain profile controls the distribution of water and areas subject to water accumulation. This index was first developed by Beven and Kirkby within their physically based runoff model, TOPMODEL, which is based on the assumption that the hydraulic slope will be equal to the topographic slope, and simulates groundwater and surface-water interactions with topography to identify which areas are susceptible to saturated land surfaces and thus have a high potential to produce surface ponding.

Map Name: Layers

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Layers:

• Cook_County_TWI (0)
• Cook_County_TWI_Filter (1)

Description:

Copyright Text:

Spatial Reference: 102100  (3857)


Single Fused Map Cache: false

Initial Extent:

XMin: -9785535.438129375
YMin: 5120981.980442581
XMax: -9755415.211222248
YMax: 5135565.842943641
Spatial Reference: 102100  (3857)

Full Extent:

XMin: -9825552.666174194
YMin: 5081661.332326457
XMax: -9742342.099753061
YMax: 5184122.800449393
Spatial Reference: 102100  (3857)

Units: esriMeters

Supported Image Format Types: PNG32,PNG24,PNG,JPG,DIB,TIFF,EMF,PS,PDF,GIF,SVG,SVGZ,BMP

Document Info:

Title: Topographic Wetmess Index
Author: Clayton Ballerine
Comments: A wetness index is based on the idea that a terrain profile controls the distribution of water and areas subject to water accumulation. This index was first developed by Beven and Kirkby within their physically based runoff model, TOPMODEL, which is based on the assumption that the hydraulic slope will be equal to the topographic slope, and simulates groundwater and surface-water interactions with topography to identify which areas are susceptible to saturated land surfaces and thus have a high potential to produce surface ponding.
Subject: Topographic Wetness Index displaying areas susceptible to saturated land surfaces and has the potential be affected by surface ponding.
Category:
Keywords: TWI
AntialiasingMode: None
TextAntialiasingMode: Force

Supports Dynamic Layers: false

MaxRecordCount: 1000

MaxImageHeight: 4096

MaxImageWidth: 4096

Supported Query Formats: JSON, geoJSON

Supports Query Data Elements:

Min Scale: 0

Max Scale: 0

Supports Datum Transformation: true



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