NSW Elevation and Depth Theme - 20m Historical Contours

<a href="https://portal.spatial.nsw.gov.au/static/exportcontent.html?featureservername=NSW_Elevation_and_Depth_Theme&amp;title=NSW Elevation and Depth Theme - 20M Historical Contours&amp;wgs84Eqv=GDA94&amp;url=https://portal.spatial.nsw.gov.au/server/rest/services/NSW_Elevation_and_Depth_Theme/FeatureServer/2">Export Data</a> <a href="https://portal.spatial.nsw.gov.au/server/rest/services/NSW_Elevation_and_Depth_Theme/FeatureServer/2">Access API</a>

<b>NSW Elevation and Depth </b><b>Theme – </b><b>20m </b><b>Historical Contours</b>

<i>Please Note</i><i>
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.</i>

Metadata <a href="https://portal.spatial.nsw.gov.au/portal/home/item.html?id=a13166e560804ce99665a294468023d4">Portal Metadata Information</a>

Content TitleNSW Elevation and Depth Theme - 20m Historical ContoursContent TypeHosted Feature LayerDescription20m 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:<ul><li>Safe hydrographic, aeronautical and road navigation</li><li>Climate science, including climate change adaptation</li><li>Emergency management and natural hazard risk assessment</li><li>Environmental, including water management</li><li>Definition of maritime and administrative boundaries</li><li>Defense and national security</li><li>Natural resource exploration and exploitation </li></ul>Initial Publication Date03/02/2020Data Currency01/01/3000Data Update FrequencyOtherContent SourceData provider filesFile TypeESRI 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 <a href="https://www.spatial.nsw.gov.au/">spatial.nsw.gov.au</a>Data Theme, Classification or Relationship to other DatasetsNSW Elevation and Depth Theme of the Foundation Spatial Data Framework (FSDF)AccuracyThis
 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)GDA94Spatial Reference System (web service)EPSG:3857WGS84 Equivalent ToGDA94Spatial ExtentFull StateContent LineageFor additional information, please contact us via the <a href="https://customerhub.spatial.nsw.gov.au/servicedesk/customer/portals">Spatial Services Customer Hub</a>Data ClassificationUnclassifiedData Access PolicyOpenData QualityFor additional information, please contact us via the <a href="https://customerhub.spatial.nsw.gov.au/servicedesk/customer/portals">Spatial Services Customer Hub</a>Terms and ConditionsCreative CommonsStandard 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
<a href="https://www.spatial.nsw.gov.au/__data/assets/pdf_file/0004/218992/Elevation_Products_Data_Specification_and_Description_LID_Oct_2020.pdf#:~:text=DCS%20Spatial%20Services%20-%20LiDAR%20Elevation">DCS Spatial Services: Elevation Data Products Specification and Description (LiDAR)</a>
<a href="https://www.spatial.nsw.gov.au/__data/assets/pdf_file/0005/218993/Elevation_Products_Data_Specification_and_Description_PHO_April_2020.pdf#:~:text=DCS%20Spatial%20Services%20-%20Photogrammetric%20Elevation">DCS Spatial Services: Elevation Data Products Specification and Description (Airborne Photogrammetry)</a>  Data CustodianDCS Spatial Services346 Panorama Ave Bathurst NSW 2795Point of ContactPlease contact us via the <a href="https://customerhub.spatial.nsw.gov.au/servicedesk/customer/portals">Spatial Services Customer Hub</a>Data AggregatorDCS Spatial Services346 Panorama Ave Bathurst NSW 2795Data DistributorDCS Spatial Services346 Panorama Ave Bathurst NSW 2795Additional Supporting Information<a href="https://www.spatial.nsw.gov.au/publications/information_sheets/data_dictionaries">Data Dictionaries</a>TRIM Number

Tags: 20 meters, 20M, 20m Historical Contours, AHD, Aerial, Contours, DEM, DEMS, ELVIS, Elevation and Depth Theme, FeatureServer, GDA2020, Historical Contours, LIDAR, LiDAR, MULTICRS, MultiCRS Service, NSW-Elevation-and-Depth-Theme, Photogrammetry, Point Cloud, Relative Heights, Spot Heights
Organization: Spatial Services (DCS)