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Metadata : Sinkholes of the Katherine Region, Northern Territory |
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Metadata Details:
Name:AS/NZS ISO 19115 Geographic Information - Metadata, ANZLIC Metadata Profile
Version:1.0
Date Metadata Extracted:2024-04-27
Date Metadata Last Updated:2018-12-12
Current URL (HTML format) : http://www.ntlis.nt.gov.au/metadata/export_data?type=html&metadata_id=B73D3B01253B7BDFE040CD9B21444C12
Current URL (XML format) : http://www.ntlis.nt.gov.au/metadata/export_data?type=xml&metadata_id=B73D3B01253B7BDFE040CD9B21444C12
Citation
ANZLIC Identifier:B73D3B01253B7BDFE040CD9B21444C12
Title:Sinkholes of the Katherine Region, Northern Territory
Citation Date:2001-08-01
Date Type:creation
Custodian:Department of Environment, Parks and Water Security
Description
This study includes the first comprehensive description of sinkholes and their characteristics in the Katherine region where karst topography is a predominant component of the surface or nearsurface geology. The study area covers approximately 962km2 around the township of Katherine where 283 sinkhole locations were defined between 1999 and 2002.
The primary objective of the study was to provide basic information and data aimed at enhancing the understanding of karst topography as it relates to the potential for sinkhole collapses in the Katherine Region. This information is extremely important for planning processes and is essential to agencies responsible for planning, zoning, design, and construction in areas underlain by the Tindall Limestone.
- environment
- geoscientificInformation
- imageryBaseMapsEarthCover
Bounding Coordinates:
- North Bounding Coordinate:-14.335
- South Bounding Coordinate:-14.6402
- East Bounding Coordinate:132.5019
- West Bounding Coordinate:132.1067
Dataset Status
Dataset ID:
Language:English
Character Set: Latin 1
Progress:completed
Maintenance and Update Frequency:notPlanned
Data Currency Start Date:2002-06-01
Data Currency End Date:2013-06-06
Access Constraint:
Download the spatial data package (contains spatial data, maps and reports) via data.nt.gov.au/
You are licensed to use the DENR geospatial products on the terms and conditions set out in: Creative Commons Attribution 4.0 International Public License (CC BY 4.0) at: creativecommons.org/licenses/by/4.0/legalcode
If you do not agree to the terms and conditions you must not use the geospatial products.
You are free to copy, communicate and adapt the licensed material, provided that you abide by the licence terms (including Attribution) and attribute the licensed material using the statement:
Supplied by the Department of Environment and Natural Resources. Copyright Northern Territory Government.
Data Quality
Lineage:The primary location of all sinkholes in the project area was determined by use of topographic maps and aerial photographs. Topographical maps in scales 1:5 000, 1:10 000, 1:50 000 and 1: 100 000 were used. All detected sinkholes were transferred onto a 1:10 000 base map. From subsequent field reconnaissance 283 sinkholes were identified and assessed.
Positional Accuracy:Descriptions of the two-dimensional geometry of karst depression depth, width, and elongation trends in sinkholes were determined using measurement protocols described by Williams (1971). This
method is described in Figure 9 of the report. The central coordinate location is used to create point spatial data for this study. The scale of the data should not be used beyond 1:50,000.
Attribute Accuracy:Sinkhole attributes are described in the report in Appendix B - Morphometry of Karst Depressions. These attributes were joined to the site locations of the sinkholes.
Logical Consistency:Point data described using coordinate locations in the report as Datum AGD66 in the UTM projection of Zone 53. The data was converted to Datum GDA94 in geographic coordinates using GIS tools.
Completeness:complete
Contacts
Name Organisation Position Role Phone Fax Data Requests Officer Department of Environment, Parks and Water Security Geospatial Services Branch (on behalf of department) distributor datarequests.depws@nt.gov.au
Data Dictionary
Attribute Attribute Description Possible Code Code Description AREA_CLASS Alias: Area (m2) Class
Sinkholes categorized by 6 Classes describing the size of each in area (m2)AREA_M2 N/A COMMENTS N/A DEPTH Alias: Depth (m)
Depth of sinkhole depression in metres.L1 Alias: L1 (Longest long axis)
Longest part of the sinkhole depression long axis on each side of the lowest point.L1_L2 Alias: L1+L2 (Long axis)
Total length of sinkhole depression long axis
L2 Alias: L2 (shortest long axis)
Shortest part of the sinkhole depression long axis on each side of the lowest point.LAT_G94 Alias: Centre Latitude (GDA94)
Latitude coordinate location of sinkhole centre, geographics (d.dddd) in Datum GDA 1994.LONG_G94 Alias: Centre Longitude (GDA94)
Longitude coordinate location of sinkhole centre, geographics (d.dddd) in Datum GDA 1994.ORIENT Alias: Orientation (degrees) RATIO Alias: Ratio (L1+L2/Wmax)
Total Length / Width; helps to distinguish collapse sinkholes from solution sinkholes.SITE_NO Alias: Sinkhole Site Number SURVEY_ID Alias: Survey Identifier SURVEY_NME Alias: Survey Name W1 Alias: W1 (longest short axis)
Longest part of the depression width axis on each side of the lowest point, measured at right angles to the axis.W1_W2 Alias: W1+W2 (short axis)
Total length of sinkhole depression on short axis
W2 Alias: W2 (shortest short axis)
Shortest part of the depression width axis on each side of the lowest point, measured at right angles to the axis.W_MAX Alias: Wmax (Max short axis)
Maximum width axis measured at right angles to the long axis but not necessarily passing through the lowest point.
Supplementary Information
Limitations of use
The sinkhole locations in the Katherine area were captured from aerial photographs, ground and helicopter surveys. Locations were plotted on 1:10,000 scale topographic maps and co-ordinates taken from the maps. Not all features were located using a GPS. The location accuracy is of the order of +/- 100 metres.
When assessing specific sinkholes, a site inspection is recommended to confirm and validate mapping accuracy on the ground.
Karp, D. (Feb, 2002) LAND DEGRADATION ASSOCIATED WITH SINKHOLE DEVELOPMENT IN THE KATHERINE REGION; Technical Report No 11/2002, Resource Assessment Branch, Department of Infrastructure, Planning and Environment, Darwin, Northern Territory.
The report may be downloaded (pdf) via the Northern Territory Library archives, URL - hdl.handle.net/10070/229127
2 accompanying map products may be downloaded (pdf) via NR Maps NT. URL - www.nt.gov.au/nrmapsnt
Sinkholes displayed with Land Units, URL - http://www.ntlis.nt.gov.au/mpds/get_file?file_id=5562
Sinkholes displayed with Geology Formations, URL - www.ntlis.nt.gov.au/mpds/get_file?file_id=5563
The spatial data (point locations) are available from this department. Refer to Survey Code KSINK_50.
This record maintained using the NTLIS Metadata Tool