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KYWater/LiDAR_Sinkholes_Cached (MapServer)

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Service Description: Note: The LiDAR sinkhole maps included here are provisional and updates will be provided if needed. Initital release(2015): The sinkhole maps are derived from LiDAR data using ArcGIS versions 10.1 and higher. LiDAR data were used to create digital elevation model (DEMs). Surface depressions were then extracted from the DEMs and visually inspected for sinkholes. Field verification suggests that the accuracy of the identified sinkholes to be real sinkholes is over 85%. LiDAR data were provided by the Louisville/Jefferson County Information Consortium (LOJIC) through Kentucky Division of Geographic Information. The LiDAR was flown in August, 2009 and the average point spacing is 1.0 meter. DEMs were created using LAS Class 2 surface with 5 feet resolution. Each sinkhole is presented as a polygon feature and the attribute table contains the following fields: SinkholeID: an 8-digit numerical code, in which the left three digits represent FIPS county code and the remaining five digits are sequential. Latitude: latitude of the centroid of the sinkhole Longitude: longitude of the centroid of the sinkhole Area_sqft: the approximate surficial area of the sinkhole County: County location of the sinkhole Method: the method used for identifying the sinkhole Field Verified: Show if the sinkhole is checked and verified in the field. Updates: 2017: LiDAR sinkhole map for Fayette is added. LiDAR Sinkhole maps for Woodford, Boyle, and Jessamine Counties are added. While previous efforts used LiDAR point clouds, sinkholes mapped in 2017 used LiDAR-derived 5-ft DEMs. These DEMs are obtained from Kentucky Geography Network (http://kygeonet.ky.gov/). 2019 LiDAR sinkhole maps for Anderson, Bourbon, Franklin, Madison, Mercer, Shelby, and Scott counties are added.

Map Name: LiDAR Sinkholes

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Layers: Description: The sinkhole maps are derived from LiDAR data using ArcGIS versions 10.1 and higher. LiDAR data were used to create digital elevation model (DEMs). Surface depressions were then extracted from the DEMs and visually inspected for sinkholes. Field verification suggests that the accuracy of the identified sinkholes to be real sinkholes is over 85%. The data provided here are provisional and updates will be provided if needed. LiDAR data were provided by the Louisville/Jefferson County Information Consortium (LOJIC) through Kentucky Division of Geographic Information. The LiDAR was flown in August, 2009 and the average point spacing is 1.0 meter. DEMs were created using LAS Class 2 surface with 5 feet resolution. Each sinkhole is presented as a polygon feature and the attribute table contains the following fields: SinkholeID: an 8-digit numerical code, in which the left three digits represent FIPS county code and the remaining five digits are sequential. Latitude: latitude of the centroid of the sinkhole Longitude: longitude of the centroid of the sinkhole Area_sqft: the approximate surficial area of the sinkhole County: County location of the sinkhole Method: the method used for identifying the sinkhole Field Verified: Show if the sinkhole is checked and verified in the field. In August, 2015: The sinkhole coverage for the areas of Bullitt, Jefferson, and Oldham counties that are outside the Floyds Fork watershed were added. Note that the coverage does not cover the Fort Knox military installation. Updates: 2017: LiDAR sinkhole map for Fayette is added. LiDAR Sinkhole maps for Woodford, Boyle, and Jessamine Counties are added. While previous efforts used LiDAR point clouds, sinkholes mapped in 2017 used LiDAR-derived 5-ft DEMs. These DEMs are obtained from Kentucky Geography Network (http://kygeonet.ky.gov/). 2019 LiDAR sinkhole maps for Anderson, Bourbon, Franklin, Madison, Mercer, Shelby, and Scott counties are added.

Copyright Text: Kentucky Geological Survey

Spatial Reference: 102100  (3857)


Single Fused Map Cache: true

Tile Info: Initial Extent: Full Extent: Units: esriMeters

Supported Image Format Types: PNG32,PNG24,PNG,JPG,DIB,TIFF,EMF,PS,PDF,GIF,SVG,SVGZ,BMP

Document Info: Supports Dynamic Layers: true

MaxRecordCount: 100000

MaxImageHeight: 4096

MaxImageWidth: 4096

Supported Query Formats: JSON, AMF, geoJSON

Min Scale: 5.91657527591555E8

Max Scale: 1128.497176

Supports Datum Transformation: true



Child Resources:   Info   Dynamic Layer

Supported Operations:   Export Map   Identify   QueryDomains   Find   Return Updates   Generate KML