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12384900
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KarstViewMapUnitPolygons
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544342.660800
759341.841400
4108855.558900
4362119.469200
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Projected
GCS_North_American_1983
Linear Unit: Meter (1.000000)
NAD_1983_UTM_Zone_17N
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20241020
12041600
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FGDC
Virginia Department of Energy Geology and Mineral Resources Program
434-951-6350
900 Natural Resources Drive, Suite 500
Charlottesville
Virginia
22903
20241020
ArcGIS Metadata
1.0
Matthew Heller
Virginia Department of Energy Geology and Mineral Resources Program
434-951-6350
900 Natural Resources Drive, Suite 500
Charlottesville
Virginia
22903
None
Digital Data
https://www.energy.virginia.gov/gis/rest/services/DGMR/KarstView
https://www.energy.virginia.gov/gis/rest/services/DGMR/KarstView/FeatureServer
Enterprise Geodatabase Feature Class
KarstView MapUnitPolygons Feature Class, 1:24,000-scale Feature Class
2024-09-22
Virginia Department of Energy, Geology and Mineral Resources Program
vector digital data
<DIV STYLE="text-align:Left;"><DIV><P><SPAN>This digital map feature class represents the general distribution of karst geologic features, soluble carbonate bedrock geologic units, and surficial geologic units mapped in approximately 37.5 7.5-minute quadrangles in the northern Shenandoah Valley along the Interstate-81 corridor and U.S. Route 11 in Virginia. Sinkhole locations were derived using elevation data from a 1-meter LIDAR raster and an automated fill-difference raster geoprocessing toolset where the results were then manually edited. Geologic data were compiled from previously mapped or digitally compiled maps at a nominal scale of 1:24,000. A derived karst density raster map shows the density of karst features per square mile. The database delineates map units that are identified by general age and lithology, generally following the stratigraphic nomenclature of the U.S. Geological Survey (USGS). This metadata report provides an overview of the data content of this GeMS geodatabase and associated derivative files.</SPAN></P></DIV></DIV>
This digital map feature dataset represents the general distribution of karst geologic features, carbonate bedrock geologic units, and surficial geologic units mapped in approximately 37.5 quadrangles along the Interstate-81 corridor in Virginia. The purpose of this dataset to is to help landowners, businesses, industries, consultants, and government agencies make wise decisions in karst areas. It is recommended that users not use the data beyond the recommended scale range of 1:24,000. Users requiring more detailed geologic mapping should see the original geologic map citation found in the DataSources fields of the data.
Mathew Heller
Virginia Department of Energy, Geology and Mineral Resources Program
434-951-6340
900 Natural Resources Drive, Suite 500
Charlottesville
Virginia
22903
US
dgmrinfo@energy.virginia.gov
Virginia, Valley and Ridge, Interstate 81, U.S. Highway 11, Harrisonburg, Buena Vista, Staunton, Lexington, Roanoke, Winchester, Blacksburg, Shenandoah River, James River, Roanoke River, New River, Stephens City, Middletown, Glasgow, Buchanan, Fincastle, Daleville, Salem, Christiansburg
geologic, geologic controls, geologic mapping, surficial geologic units, geologic maps, geomorphology, surficial geologic maps, geological map, geologic faulting, geologic formations, karst, sinkhole, derivative map
geologic
geologic controls
geologic mapping
surficial geologic units
geologic maps
geomorphology
surficial geologic maps
geological map
geologic faulting
geologic formations
karst
sinkhole
derivative map
Virginia
Valley and Ridge
Interstate 81
U.S. Highway 11
Harrisonburg
Buena Vista
Staunton
Lexington
Roanoke
Winchester
Blacksburg
Shenandoah River
James River
Roanoke River
New River
Stephens City
Middletown
Glasgow
Buchanan
Fincastle
Daleville
Salem
Christiansburg
<DIV STYLE="text-align:Left;"><DIV><P><SPAN>Not for use at scales larger than 1:24,000. Any derivative products utilizing these datasets shall clearly indicate their source. If users modify the data in any way, they are obligated to describe the types of modifications they have performed. User specifically agrees not to misrepresent these datasets, nor to imply that changes they made were approved by the Virginia Department of Energy.</SPAN></P></DIV></DIV>
The Virginia Department of Energy (Virginia Energy) provides these geographic data "as is." Virginia Energy makes no guarantee or warranty concerning the accuracy of information contained in the geographic data. Virginia Energy further makes no warranties, either expressed or implied as to any other matter whatsoever, including, without limitation, the condition of the product, or its fitness for any particular purpose. The burden for determining fitness for use lies entirely with the user. Although these data have been processed successfully on computers at Virginia Energy, no warranty, expressed or implied, is made by Virginia Energy regarding the use of these data on any other system, nor does the fact of distribution constitute or imply any such warranty. In no event shall Virginia Energy have any liability whatsoever for payment of any consequential, incidental, indirect, special, or tort damages of any kind, including, but not limited to, any loss of profits arising out of use of or reliance on the geographic data or arising out of delivery, installation, operation, or support by Virginia Energy.
true
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39.3696
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0.000000
0.000000
publication date
2024-09-22
0.000000
0.000000
Esri ArcGIS 13.1.3.41833
1
-80.500817
-77.989551
39.407446
37.090133
Confidence that a feature exists and confidence that a feature is correctly identified are described in per-feature attributes ExistenceConfidence and IdentityConfidence.
Database topology, geometric, and logical errors were identified and fixed iteratively using the "Check Topology" tool and the "Validate Database" tool in the ArcGIS GeMS Database Toolbox (available at https://github.com/usgs/gems-tools-pro).
This digital map feature class contains the general distribution of karst features including sinkhole point locations and polygon areas, sinkhole mitigation locations, carbonate bedrock, surficial geologic units, structural measurements, geologic lines, geologically relevant point data (geotechnical borings, samples, etc.), and natural features (springs) within 18 7.5-minute quadrangles along the I-81 corridor in Virginia. The study area includes the Arnold Valley, Blacksburg, Bridgewater, Broadway, Brownsburg, Buchanan, Conicville, Cornwall, Daleville, Edinburg, Elliston, Fort Defiance, Glasgow, Glenvar, Greenville, Harrisonburg, Inwood (Virginia portion), Ironto, Lexington, Middletown, Mount Sidney, Mountain Falls (Virginia portion) Natural Bridge, New Market, Roanoke, Salem, Salisbury, Staunton, Stephens City, Stephenson, Stuarts Draft, Tenth Legion, Toms Brook, Vesuvius, Villamont, White Hall (Virginia portion), Winchester and Woodstock quadrangles. The geodatabase is a compilation of geologic data published 1967-2019. For complete citations of data sources used within this product see the DataSources nonspatial table.
Estimated accuracy of horizontal location is given on a per-feature basis by attribute LocationConfidenceMeters. Values are expected to be correct within a factor of 2. A LocationConfidenceMeters value of -9 or -9999 indicates that no value has been assigned.
Previously published geologic maps and digital data were compiled for this project. For a complete list of sources used, see the Karst View DataSources nonspatial table.
2022-12-01
The GeMS-compliant geodatabase from Phase 1 of the project was copied for use as a Phase 2 starting point.
2022-12-01
The feature classes from the previous step were symbolized and attributed according to GeMS and FGDC standards.
2023-12-01
The MapUnitPolys feature class was rebuilt using the “Make Polygons” tool in the GeMS toolbox to accommodate additional contacts from digitized sources. Polygons were symbolized according to GeMS and FGDC standards.
2023-12-01
Surficial geological units were copied into the MapUnitOverlayPolys feature class and symbolized and attributed according to GeMS and FGDC standards. New surficial deposits were digitized using the 1-meter LIDAR basemap in areas which lacked surficial units on the original geologic map.
2024-02-01
Sinkhole locations (point and polygons) were derived using an automated fill-difference raster geoprocessing model creating with the ModelBuilder program in ArcGIS Pro. The geoprocessing model starts with an input LIDAR DEM and ends with outputs of polygons and point features that represent potential karst features.
2024-04-01
The final outputs of the automated fill-difference raster geoprocessing model were visually inspected to remove depressions which were not likely to be karst related. All delineated polygons and points were examined to determine if the feature was probable, possible, or false. For a more detailed discussion of this quality control process, please see the accompanying pamphlet.
2024-05-01
Finalized sinkhole points and polygons were imported in to the "Sinkhole" feature dataset and symbolized using the FGDC standard symbology.
2024-06-01
A new feature class for "sinkhole repair locations" was created in the "Sinkhole" feature dataset. Unique fields were created to hold data specific to this feature class. Sinkhole mitigation locations were then imported from the VDOT sinkhole repair database.
2024-06-01
The GeMS ArcGIS Toolbox was used to automate feature class field completion and to validate the geodatabase, and build initial metadata.
2024-09-22
1066
dataset
EPSG
6.11(3.0.1)
Simple
FALSE
1066
TRUE
FALSE
KarstViewMapUnitPolygons
Feature Class
1066
OBJECTID
OBJECTID
OID
4
10
0
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
Shape
SHAPE
Geometry
8
0
0
Feature geometry.
Esri
Coordinates defining the features.
MapUnit
MapUnit
String
10
0
0
IdentityConfidence
IdentityConfidence
String
50
0
0
Label
Label
String
50
0
0
Symbol
Symbol
String
254
0
0
DataSourceID
DataSourceID
String
255
0
0
Notes
Notes
String
254
0
0
MapUnitPolys_ID
MapUnitPolys_ID
String
50
0
0
created_user
created_user
String
255
0
0
created_date
created_date
Date
8
0
0
last_edited_user
last_edited_user
String
255
0
0
last_edited_date
last_edited_date
Date
8
0
0
Shape.STArea()
Shape.STArea()
Double
0
0
0
Shape.STLength()
Shape.STLength()
Double
0
0
0