Contacts

Identifiers and Keywords

ANZLIC Id

ANZVI0803002811 

Victorian Spatial Data Library (VSDL) Schema

MARINE1:CE_GIPPSLAND_LAKES_1998 

Jurisdiction

Victoria 

Topic category

• Farming

Resource Constraints

Use limitation

DataVic 

Classification

Unclassified  

Creative Commons Attribution 4.0 (CC-BY)

• 
• License Text

Other Dataset Details

Date ( Revision )

2016-12-05

Date ( Publication )

2018-01-23T12:40:07

Status

Completed  

Purpose

The CE_GIPPSLAND_LAKES_1998 layer provides cells on which various summary catch and effort data for the Gippsland Lakes fisheries can be imported, displayed, and analysed. Catch and effort data can be used to display trends in fishing activity. Summary information such as extent of catch, total catch, effort, catch per unit area, and catch per unit effort can be represented. This information is crucial to ensure effective fisheries management, research and monitoring. This data set may be displayed in conjunction with a variety of environmental data capable of providing an insight into the behaviour of the many species caught in the Gippsland Lakes. A depth model, ocean currents, temperature profiles and salinity levels, are useful data that may assist in gaining an understanding into the ecology of these species. 

Supplemental Information

History: 4 Feb 2004 - Creation of original layer and addition of new attributes and attribute values. 2 Mar 2005 - Projection of shapefile into GDA. Relationship to other Datasets: This layer was originally created from a layer of Gippsland Lakes area cells. The shoreline of the lakes is derived from the 1:25,000 Linear Hydrological Features (HYDRO25) layer of the Corporate Geospatial Data Library (CGDL), which is itself derived from Land Victoria's State Digital Map Base topographic layer, converted from Microstation DGN format to ArcInfo format. Current Design Issues: The layer from which this dataset was created was originally designed in accordance with the specifications set out in the Victorian Gippsland Lakes And Lake Tyers Fishing logbook. It was later revised based on feedback received from the Catch And Effort Unit, Department of Primary Industries (DPI), Queenscliff. Related Documents: None CGDL HYDRO25 metadata is available at the address below for DSE/DPI staff only http://sysx/cgi-bin/websql/metadata/dataset_full.hts?name=HYDRO25 

Maintenance and update frequency

As needed  

Maintenance date ( Publication )

2018-01-23T12:40:07

Spatial

Spatial representation type

Vector  

Reference system identifier

4283

Temporal

Begin date

2004-02-04 

End date

2004-02-04 

Resolution

Horizontal Accuracy

25m  

Quality

Conceptual Consistency

This data has been validated by the Habitat Ecology section, DPI. 

Missing Data

This layer is complete for the Gippsland Lakes. 

Attribute Quality

All attributes have been validated by the Habitat Ecology section, DPI, and are complete. 

Positional Accuracy

The area code polygon boundary lines in this dataset link specific geographic features. For the source layer: * Description: From the State Digital Map Base - Topographic metadata (Geospatial Information), "The planimetric accuracy attainable will be the sum of errors from three sources: the positional accuracy of the source material, errors due to the conversion process and errors due to the manipulation process". * Determination: Survey controlled with 8 points per mapsheet with a residual error less than 10m at ground scale * Horizontal Accuracy: 90% of well defined points will fall within ±12.5m of their true position. * Vertical Accuracy: 90% of elevations will fall within ±0.5 of a contour interval, which are at 10 or 20 metres. 

Lineage

Description

The polygons from another coverage of Gippsland Lakes areas were dissolved by their area code to create the dataset. In the new dataset, the region features were dropped, a polygon corresponding to an area no longer fished was deleted, two other attributes were added to the dissolve item and their values were calculated for all of the polygons. This dataset was later converted to a shapefile and projected into the Geocentric Datum of Australia (GDA) 

Statement

Dataset Source: Land Victoria - State Digital Map Base. Gippsland Lakes And Lake Tyers Fishing areas 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	18	2				AREASQM
DESCRIPTION	O	N	VARCHAR2	40						DESC
AREACODE	O	N	NUMBER	22	10	0				AREACODE
AS2482	O	N	NUMBER	22	10	0				AS2482
HECTARES	O	N	NUMBER	22	18	2				HECTARES

About the Metadata Record

Metadata identifier

urn:uuid / 8593a7c5-5977-5ea9-a824-9541536804ad