Contacts

Identifiers and Keywords

ANZLIC Id

ANZVI0803004033 

Victorian Spatial Data Library (VSDL) Schema

MARINE1:BATHYMETRY_WESTERN_PORT_ARC 

Jurisdiction

Victoria 

Topic category

• Oceans

Resource Constraints

Use limitation

http://www.data.vic.gov.au/ NOTE: The depth information contained within this layer should not be used for navigational purposes. 

Classification

Unclassified  

Creative Commons Attribution 4.0 (CC-BY)

• 
• License Text

Other Dataset Details

Date ( Revision )

2014-11-13

Date ( Publication )

2018-01-23T12:36:27

Status

Completed  

Purpose

BATHYMETRY_WESTERN_PORT_ARC is a 1:25,000 layer used for depth analysis. Ecological research requires the type of detailed information within the BATHYMETRY_WESTERN_PORT_ARC layer relating to the nature of the sea bed. Depth models have wide ranging uses in the fisheries management, development of aquaculture and ecological research. The depth information within this layer should not be used for navigation purposes. 

Supplemental Information

History: The surveys from which the original depth contour charts were produced began in September 1974 and ended in April 1985. The digital capture of these charts for GIS commenced in December 1999 and was completed in February 2000. This layer replaced WP_BATH_25 in March 2010 Relationship to other Datasets: The BATHYMETRY_WESTERN_PORT_ARC layer draws on information stored within the SHORE25 and HYDRO25 layers. The coastline is subject to change especially in areas subject to erosion or mass movement of coastal sediments. Current Design Issues: Bathymetric information is initially 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 base line data set and future design considerations will be limited. Related Documents: None 

Maintenance and update frequency

Not planned  

Maintenance date ( Publication )

2018-01-23T12:36:27

Spatial

Spatial representation type

Vector  

Reference system identifier

4283

Temporal

Begin date

1974-09-01 

End date

2000-02-20 

Resolution

Horizontal Accuracy

25m  

Quality

Conceptual Consistency

Attributes have been checked by DPI 

Missing Data

Layer is complete for Western Port. Note however, that contours do not exist for the area west and south west of Middle Bank which has been inadequately surveyed. 

Attribute Quality

All attributes have been checked by DPI 

Positional Accuracy

Horizontal and Vertical accuracy have not been determined. The depth information within this layer should not be used for navigation purposes. 

Lineage

Description

Contours were digitised directly from all the charts. The digitised lines were then appended and the depth contours edited at the point where they overlapped. 

Statement

Dataset Source: Data was digitised from Victorian Channels Authority charts (formerly Ports and Harbours). The depth contour charts digitised to create the layer are listed below. The scale for all of these charts is 1:25,000 WP425-3023. Eastern Entrance to Corinella. Surveyed Nov 1977-Oct 1984 WP426-3024. French Island East - East Arm to Tooradin. Surveyed Nov 1977-March 1983 WP427-3025. North Arm - Hanns Inlet to Blind Bight. Surveyed Sept 1974-April 1985 WP428-3026. Western Entrance to Sandy Point. Surveyed Sept 1974-Aug 1984 For all of these charts, the composites are derived from the 1:10,000 series, Ports and Harbours, the shore detail is derived from the 1:25,000 series, Lands Department, and contours are in metres and are to chart datum, which is 1.6m below the Australian Height Datum (AHD) Dataset Originality: Primary & 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
WP_BATH4_1	O	N	NUMBER	22	11	0				WP_BATH4_1
WP_BATH4_G	O	N	NUMBER	22	11	0				WP_BATH4_G
DATUM	O	N	NUMBER	22	5	2				DATUM
DEPTH	O	N	NUMBER	22	5	2				DEPTH
FEATURE	O	N	VARCHAR2	25						FEATURE
LENGTH_M	O	N	NUMBER	22	5	0				LENGTH_M
VERSION	O	N	NUMBER	22	2	0				VERSION

About the Metadata Record

Metadata identifier

urn:uuid / 8fd6f61a-59a5-5e51-8ba9-f2d5aa107859