Name: Major Sand and Gravel Aquifers

Display Field: CODE

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: This map shows the distribution of major sand and gravel aquifers at any depth in Illinois. Generally, the tops of such aquifers lie within 300 feet of the surface and the bases occur within 500 feet. Major aquifers are defined as geologic units capable of yielding 70 gallons of potable water per minute. Potable water is defined as containing less than 2,500 milligram per liter total dissolved solids. Major sand and gravel aquifers are generally Quaternary deposits found within pre-glacial bedrock valleys or along modern streams and rivers. They are commonly separated from shallower aquifers by layers of less permeable till or fine-grained lacustrine deposits. The scale of these data is 1:500,000.

Copyright Text: Illinois State Geologic Survey

Default Visibility: true

MaxRecordCount: 1000

Supported Query Formats: JSON, geoJSON

Min Scale: 0

Max Scale: 0

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Supports Datum Transformation: true

Extent:

XMin: -1.0187238261567574E7
YMin: 4434922.085764736
XMax: -9739922.660051879
YMax: 5237434.297202125
Spatial Reference: 102100  (3857)

Drawing Info:

Renderer:
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UniqueValueInfos:
• Value: 1
  Label: Aquifer Present
  Description:
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Labeling Info:

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Supports Sql Expression: true
Supports Query With ResultType: false
Supports Returning Geometry Centroid: false
Supports Binning LOD: false
Supports Query With LOD Spatial Reference: false

HasZ: false

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Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeNone

Type ID Field: null

Fields:

• OBJECTID ( type: esriFieldTypeOID, alias: OBJECTID )
• CODE ( type: esriFieldTypeSmallInteger, alias: CODE )
• SHAPE ( type: esriFieldTypeGeometry, alias: Shape )
• SHAPE_Length ( type: esriFieldTypeDouble, alias: SHAPE_Length )
• SHAPE_Area ( type: esriFieldTypeDouble, alias: SHAPE_Area )

Supported Operations:   Query   Query Attachments   Generate Renderer   Return Updates

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