Bass Strait Depth Zone Polygons at 1:250,000
dataset:
BATHYMETRY_BASS_STRAIT_POLY
This layer contains polygon features which represent depth zones in Bass Strait.
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Citation proposal Citation proposal
(2014) Bass Strait Depth Zone Polygons at 1:250,000 Department of Primary Industries https://metashare.maps.vic.gov.au/geonetwork/srv/eng/catalog.search#/metadata/f4173d98-ef98-5690-b9d5-70808fcc3403 |
Details
Contacts
Cited responsible party
No information provided.
Cited responsible party
No information provided.
Cited responsible party
No information provided.
Point of contact
Department of Primary Industries
-
David Ball (retired)
(Habitat Ecology Section Leader)
POBox 114 2a Bellarine Highway
Queenscliff
VIC
3225
Australia
Identifiers and Keywords
- ANZLIC Id
- ANZVI0803004017
- Victorian Spatial Data Library (VSDL) Schema
- MARINE1:BATHYMETRY_BASS_STRAIT_POLY
- Jurisdiction
- Victoria
- Topic category
-
- Oceans
Resource Constraints
- Use limitation
- http://www.data.vic.gov.au/ The bathymetric information contained within this layer is not to be used for navigation purposes
- Classification
- Unclassified
- Creative Commons Attribution 4.0 (CC-BY)
Other Dataset Details
- Date ( Revision )
- 2014-11-13
- Date ( Publication )
- 2018-01-23T12:34:47
- Status
- Completed
- Purpose
- BATHYMETRY_BASS_STRAIT_POLY is a 1:250,000 polygon layer which represents subtidal relief (bathymetry). This layer will serve as a Digital Terrain Model (DTM) until more depth data can be obtained from which DTMs can be generated using automated techniques. Common uses for depth zone information include comparative analysis with fisheries catch data and representing the movement of commercial species in three dimensions. The depth information contained within this layer should not be used for navigation purposes. Vertical datum is mean sea level. The 10 metre contour and 0-10 m depth zone were interpolated by DPI Queenscliff (formerly MAFRI) using the coastline and the 20 metre contour.
- Credit
- Ralph Roob, Allister Coots
- Supplemental Information
- History: This layer replaced DEPTH250_POLYGON in March 2010 Relationship to other Datasets: The depth zones are bounded by isobaths from the BATHYMETRY_BASS_STRAIT_ARC layer.The landward boundary is the 1:250,000 coastal trace. The coastal trace is subject to change especially in areas subject to erosion or mass movement of coastal sediments. In order to create polygon depth zones, the isobaths used in this layer are a reduced set from those found in the BATHYMETRY_BASS_STRAIT_ARC layer. Not all of the isobaths in BATHYMETRY_BASS_STRAIT_ARC are complete for the entire area covered by this layer and some of the isobaths on the edge of the continental shelf are too closely spaced to practically create polygons. As a result the depth zones found in this layer cover depth ranges of between 10, 20 or 50 m depending on the gradient of the seabed and the available data. This layer does not include depths for bays and inlets with the exception of coarse scale contours for Port Phillip Bay. Depth information is available in separate 1:25,000 layers for the main bays and inlets in Victoria. Current Design Issues: All bathymetric information is collected as point features or spot depths. Isobaths are interpreted either by visual manual methods or by automated techniques. As more data becomes available the positional accuracy of isobaths should be revised. Each acquisition of depth information needs to be documented and assessed before it is incorporated in the layer. Future Design Issues: This layer is a baseline data set and future design considerations will be limited. Related Documents: None
- Maintenance and update frequency
- As needed
- Maintenance date ( Publication )
- 2018-01-23T12:34:47
Spatial
- Spatial representation type
- Vector
- Reference system identifier
- 4283
Temporal
- Begin date
- 1995-02-01
- End date
- 1995-03-31
Resolution
- Horizontal Accuracy
- 250m
Quality
- Conceptual Consistency
- This layer exists as a single entity for Bass Strait.
- Missing Data
- Bass Strait This layer is complete for Bass Strait.
- Attribute Quality
- There has been no assessment of attribute accuracy.
- Positional Accuracy
- Precision of source data (1:250,000 Natioinal Bathymetric Map Series): Horizontal accuracy 100m to 1km of well defined points. Vertical accuracy 10cm to 1m in elevation. Depths are relative to Mean Sea Level. Digital precision: Any departure between the digital and source material (measured between centre lines) will not exceed 1mm at map scale (i.e. 250m at 1:250,000) Determination: Positional accuracy is only an estimate and has not been subject to any test. The depth information within this layer should not be used for navigation purposes.
Lineage
- Description
- The data was generated from the 1:250,000 National Bathymetric Map Series. Polygons were generated by adding breaklines to close off isobaths and deleting isobaths of 10 metre intervals not represented in their entirety because of close spacing, especially on the continental shelf, leaving the isobaths of 50 metre intervals to represent the depth ranges. Polygon topology was built and then attributed according to the shallowest and deepest isobath forming the boundary of the depth zone. The area between the 20 metre contour and the coastline is generally unsurveyed and the source maps did not have a 10 m contour. As a result the 10 m contour and 0-10 m depth zone in this layer were created by DPI Queenscliff (formerly MAFRI) by interpolating a line between the coastline and the 20 m contour.
- Statement
- Dataset Source: Division of National Mapping - 1:250,000 National Bathymetric Map Series (1977-1986) Dataset Originality: Derived
Attributes
-
Column Name Obligation Unique Data Type Data Length Data Precision Data Scale Reference Table Owner Reference Table Name Reference Table Code Column Name Short Column Name Definition AREASQM O N NUMBER 22 12 0 AREASQM DEPTHRANGE O N VARCHAR2 20 DEPTHRANGE DEPTHP2501 O N NUMBER 22 11 0 DEPTHP2501 DEPTHS O N NUMBER 22 6 0 DEPTHS DEPTHP250_ O N NUMBER 22 11 0 DEPTHP250_ MAXDEPTH O N NUMBER 22 3 0 MAXDEPTH VERSION O N NUMBER 22 3 0 VERSION PERIM_M O N NUMBER 22 6 0 PERIM_M MINDEPTH O N NUMBER 22 3 0 MINDEPTH
About the Metadata Record
- Metadata identifier
- f4173d98-ef98-5690-b9d5-70808fcc3403
Contact
No information provided.
- Resource Type
- Dataset
- Date info ( Revision )
- 2014-11-13
- Standard Name
- ISO 19115-3:2018
- Profile Name
- DELWP Profile
- Profile Version
- Version 1
- Profile Date
- 2019-05-24
Metadata Constraints
- Classification
- Unclassified
Overviews
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Associated resources
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