NSW Elevation and Depth Theme – 20m Historical Contours

Please Note
WGS 84 service aligned to GDA94
This dataset has spatial reference [WGS 84 ≈ GDA94] which may result in misalignments when viewed in GDA2020 environments. A similar service with a ‘multiCRS’ suffix is available which can support GDA2020, GDA94 and WGS 84 ≈ GDA2020 environments.
In due course, and allowing time for user feedback and testing, it is intended that the original service name will adopt the new multiCRS functionality.

Metadata Portal Metadata Information

Content Title	NSW Elevation and Depth Theme - 20m Historical Contours
Content Type	Hosted Feature Layer
Description	20m Historical Contours are virtual imaginary lines on the ground, joining points of an equal elevation. 10m Historical Contours were captured in a verity of methods and scales, initially captured at 1:25 000, 1:50 000 and 1:100 000 scales from stereoscopic aerial photography or Ortho image trace methods. These contours were digitised into the vector data product over a number of years with the processing being completed 2003 through to 2017. Feature reliability date of the original contours rage from 1971 through to 2008. Contours are virtual imaginary lines on the ground, joining points of an equal elevation in relation to the Australian Height Datum (AHD). A contour can be a standard contour, depression contour or an ancillary contour. It is a part of the NSW Elevation and Depth Theme. Elevation and Depth provides an authoritative digital representation of the Earth’s surface enabling evidence based decision making, policy development and an essential reference to other foundation datasets. Elevation and Depth underpins: Safe hydrographic, aeronautical and road navigation Climate science, including climate change adaptation Emergency management and natural hazard risk assessment Environmental, including water management Definition of maritime and administrative boundaries Defense and national security Natural resource exploration and exploitation
Initial Publication Date	03/02/2020
Data Currency	01/01/3000
Data Update Frequency	Other
Content Source	Data provider files
File Type	ESRI File Geodatabase (*.gdb)
Attribution	© State of New South Wales (Spatial Services, a business unit of the Department of Customer Service NSW). For current information go to spatial.nsw.gov.au
Data Theme, Classification or Relationship to other Datasets	NSW Elevation and Depth Theme of the Foundation Spatial Data Framework (FSDF)
Accuracy	This dataset was captured by utilising the best available source at a variety of scales and accuracies, ranging from 1:500 to 1:250 000 according to the National Mapping Council of Australia, Standards of Map Accuracy (1975). Therefore, the position of the feature instance will be within 0.5mm at map scale for 90% of the well-defined points. That is, 1:500 = 0.25m, 1:2000 = 1m, 1:4000 = 2m, 1:25000 = 12.5m, 1:50000 = 25m and 1:100000 = 50m. A program to upgrade the spatial location and accuracy of data is ongoing.
Spatial Reference System (dataset)	GDA94
Spatial Reference System (web service)	EPSG:3857
WGS84 Equivalent To	GDA94
Spatial Extent	Full State
Content Lineage	For additional information, please contact us via the Spatial Services Customer Hub
Data Classification	Unclassified
Data Access Policy	Open
Data Quality	For additional information, please contact us via the Spatial Services Customer Hub
Terms and Conditions	Creative Commons
Standard and Specification	AS/NZS ISO 19115 - ANZLIC Metadata Profile Version 1.1 AS/NZS ISO 19131:2008 Geographic Information - Data product specifications OGC compliant Web Map Services (WMS) and Web Feature Services (WFS) Metadata for the relevant Spatial Services datasets complies with AS/NZS ISO 19115-2, ANZLIC Metadata Profile v1.1 and ISO 19139 Intergovernmental Committee on Surveying and Mapping (ICSM): Guidelines for Digital Elevation Data DCS Spatial Services: Elevation Data Products Specification and Description (LiDAR) DCS Spatial Services: Elevation Data Products Specification and Description (Airborne Photogrammetry)
Data Custodian	DCS Spatial Services 346 Panorama Ave Bathurst NSW 2795
Point of Contact	Please contact us via the Spatial Services Customer Hub
Data Aggregator	DCS Spatial Services 346 Panorama Ave Bathurst NSW 2795
Data Distributor	DCS Spatial Services 346 Panorama Ave Bathurst NSW 2795
Additional Supporting Information	Data Dictionaries
TRIM Number

NSW Elevation and Depth Theme - 20m Historical Contours

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