Name: TWI_noOpenWaterUniLakeCo
Display Field: Shape_Leng
Type: Feature Layer
Geometry Type: esriGeometryPolygon
Description: The TWI is a physically based index or indicator of the effect of local topography on runoff flow direction and accumulation. The index is a function of both the slope and the upstream contributing area.The computation of TWI is performed using both geographic information systems (GIS) and Python, a programing software used to enhance computing capabilities. The indices help identify rainfall runoff patterns, areas of potential increased soil moisture, and ponding areas. Illinois State Water Survey generated the index to the Illinois counties of DuPage and Will (see report at http://hdl.handle.net/2142/98495), but has subsequently generated the index for all Illinois counties. The DEM used for this county was derived from LiDAR acquired in 2018. While TWI is usually viewed in raster format, ISWS is distributing a version in polygon format for easier access and use.
Illinois State Water Survey
Min. Scale: 0
Max. Scale: 0
Default Visibility: true
Max Record Count: 2000
Supported query Formats: JSON, geoJSON, PBF
Use Standardized Queries: True
Extent:
XMin: 1020625.93527367
YMin: 1998755.35291042
XMax: 1123923.63090884
YMax: 2123311.63923043
Spatial Reference: 3529 (3529)
Drawing Info:
{"renderer":{"type":"simple","symbol":{"type":"esriSFS","style":"esriSFSSolid","color":[181,252,194,255],"outline":{"type":"esriSLS","style":"esriSLSSolid","color":[110,110,110,255],"width":0.7}}},"scaleSymbols":true,"transparency":50,"labelingInfo":null}
HasZ: false
HasM: false
Has Attachments: false
Has Geometry Properties: true
HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText
Object ID Field: OBJECTID
Unique ID Field:
IsSystemMaintained : True
Global ID Field:
Type ID Field:
Fields:
- OBJECTID (type: esriFieldTypeOID, alias: OBJECTID, SQL Type: sqlTypeOther, length: 0, nullable: false, editable: false)
- Shape_Leng (type: esriFieldTypeDouble, alias: Shape_Leng, SQL Type: sqlTypeOther, nullable: true, editable: true)
- ACRES (type: esriFieldTypeSingle, alias: ACRES, SQL Type: sqlTypeOther, nullable: true, editable: true)
- Shape__Area (type: esriFieldTypeDouble, alias: Shape__Area, SQL Type: sqlTypeDouble, nullable: true, editable: false)
- Shape__Length (type: esriFieldTypeDouble, alias: Shape__Length, SQL Type: sqlTypeDouble, nullable: true, editable: false)
Templates:
Name: TWI_noOpenWaterUniLakeCo
Description:
Drawing Tool: esriFeatureEditToolPolygon
Prototype:
Is Data Versioned: false
Has Contingent Values: false
Supports Rollback On Failure Parameter: true
Last Edit Date: 2/9/2022 4:05:10 PM
Schema Last Edit Date: 2/9/2022 4:05:10 PM
Data Last Edit Date: 2/9/2022 4:05:10 PM
Supported Operations:
Query
Query Pivot
Query Top Features
Query Analytic
Query Bins
Generate Renderer
Validate SQL
Get Estimates
ConvertFormat