Name: Illinois_Springfield_Depth
Display Field: Depth
Type: Feature Layer
Geometry Type: esriGeometryPolygon
Description: This datafile shows a highly generalized depth to the top of the Danville (No. 7) coal in Illinois. These 100-foot contours were created by Earthvision software using more than 9,500 data from drill holes. Because the depth of the coal was contoured directly from drill hole data (as opposed to creating a map of coal elevation and subtracting it from a map of surface topography) the resulting map is essentially based on the assumption that the land surface is a level plain. Consequently, the accuracy of the map is lowest where the coal is shallowest. Data control was very poor in north-central Illinois and the Eagle Valley area in southeastern Illinois. Because a revised crop of the Danville Coal was not available, this file was originally constructed using the crop of the Herrin Coal. This data set is intended for use at a scale of 1:750,000. This data set was created as part of the ISGS GIS database to show general depth of the Danville (No. 7) Coal seam. The data are appropriate for regional analysis.
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Max. Scale: 0
Default Visibility: true
Max Record Count: 2000
Supported query Formats: JSON, geoJSON, PBF
Use Standardized Queries: True
Extent:
XMin: -10087209.8882
YMin: 4522835.9129
XMax: -9739922.6601
YMax: 5084636.5595
Spatial Reference: 102100 (3857)
Drawing Info:
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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)
- Depth (type: esriFieldTypeDouble, alias: Depth, SQL Type: sqlTypeOther, nullable: true, editable: true)
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- Shape__Length (type: esriFieldTypeDouble, alias: Shape__Length, SQL Type: sqlTypeDouble, nullable: true, editable: false)
Templates:
Name: Illinois_Springfield_Depth
Description:
Drawing Tool: esriFeatureEditToolPolygon
Prototype:
Is Data Versioned: false
Has Contingent Values: false
Supports Rollback On Failure Parameter: true
Last Edit Date: 4/1/2022 2:28:21 PM
Schema Last Edit Date: 4/1/2022 2:28:21 PM
Data Last Edit Date: 4/1/2022 2:28:21 PM
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