View In:   ArcGIS Online Map Viewer

Name: Karst

Display Field: OBJECTID

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: The data set was developed by the Virginia Division of Geology and Mineral Resources to depict areas of karst as defined by the presence of sinkholes. Sinkholes were identified from low-altitude stereoscopic aerial photo pairs and traced onto 1:24:000 paper topographic maps, from which they were table-digitized. This is the same data depicted at 1:250,000 scale in Division of Geology Mineral Resources Publications 44, 83, and 167. Field checking has revealed that many more sinkholes are present than are depicted in this dataset. Therefore, these data should serve as a general guide to areas of karst-related sinkhole development, and not as a true indication of the presence or absence of sinkholes at a particular location.

Service Item Id: 7d72d6759dab4d1992e98dd96984c993

Copyright Text: Virginia Division of Geology and Mineral Resources Department of Mines, Minerals and Energy Hubbard, D. A., Jr., 1983, Selected Karst Features of the Northern Valley and Ridge Province, Virginia: Virginia Division of Mineral Resources Publication 44, 1:250,000-scale map. Hubbard, D. A., Jr., 1988, Selected Karst Features of the Central Valley and Ridge Province, Virginia: Virginia Division of Mineral Resources Publication 83, 1:250,000-scale map. Hubbard, D. A., Jr., 2001, Selected Karst Features of the Southern Valley and Ridge Province, Virginia: Virginia Division of Mineral Resources Publication 167, 1:250,000-scale map.

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MaxRecordCount: 2000

Supported Query Formats: JSON, geoJSON, PBF

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Supports Advanced Queries: true

Supports Statistics: true

Can Scale Symbols: false

Use Standardized Queries: true

Supports ValidateSQL: true

Supports Calculate: true

Supports Datum Transformation: true

Extent:

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YMin: 3528164.017215058
XMax: 1.1203732971933886E7
YMax: 3794671.143648565
Spatial Reference: 102747  (2284)

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Labeling Info:

Advanced Query Capabilities:

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HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field:

Fields:

• OBJECTID_1 ( type: esriFieldTypeOID, alias: OBJECTID_1, editable: false, nullable: false, defaultValue: null, modelName: OBJECTID_1 )
• OBJECTID ( type: esriFieldTypeInteger, alias: OBJECTID, editable: true, nullable: true, defaultValue: null, modelName: OBJECTID )
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Templates:

• Name: Karst
  Description:
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Supports Coordinates Quantization: true

Supported Operations:   Query   Query Attachments   Query Analytic   Calculate   Validate SQL   Generate Renderer   Return Updates   Iteminfo   Thumbnail   Metadata