Contacts

Identifiers and Keywords

ANZLIC Id

ANZVI0803004056 

Victorian Spatial Data Library (VSDL) Schema

MARINE1:SEAGRASS_WESTERN_PORT_1999 

Jurisdiction

Victoria 

Topic category

• Oceans

Resource Constraints

Use limitation

General Access 

Classification

Unclassified  

Creative Commons Attribution 4.0 (CC-BY)

• 
• License Text

Other Dataset Details

Date ( Revision )

2015-11-25

Date ( Publication )

2018-01-23T12:46:35

Status

Completed  

Purpose

Represents the spatial extent, species distribution and density of seagrass and other aquatic vegetation in Western Port mapped from aerial photography and field observations. This layer forms part of a baseline survey of seagrass across Victoria. Ecological research into the health of seagrass meadows requires the type of detailed information collected in this baseline survey. 

Credit

David Ball, Penny Morris 

Supplemental Information

Relationship to other Datasets: The landward boundary of the layer corresponds to the 1:25,000 coastline (SHORE25). The coastline is subject to change especially in areas subject to erosion or mass movement of coastal sediments and at the entrance to the inlets. This layer forms part of a Statewide program to map seagrass throughout Victoria. Other seagrass layers exist for Port Phillip Bay, Gippsland Lakes, Corner Inlet/Nooramunga, and minor inlets of eastern Victoria (the latter was originally intended to be a single layer, but has since been split into separate layers for Anderson, Shallow, Sydenham, Tamboon, Wingan and Mallacoota Inlets) Current Design Issues: This information represents a "snap-shot" in time of the spatial extent of seagrass meadows in Western Port. The area of coverage and density of the various species of seagrass changes with time, both seasonally and yearly. Future Design Issues: Future design considerations may include the adding extra species and recording the condition of the seagrass in relation to epiphyte coverage. Related Documents: None 

Maintenance and update frequency

Not planned  

Maintenance date ( Publication )

2018-01-23T12:46:35

Spatial

Spatial representation type

Vector  

Reference system identifier

4283

Temporal

Begin date

1999-05-01 

End date

2000-04-01 

Resolution

Horizontal Accuracy

25m  

Quality

Conceptual Consistency

Not determined 

Missing Data

This layer is complete for Western Port 

Attribute Quality

All attributes have been checked by DPI Queenscliff, and are complete 

Positional Accuracy

Horizonal accuracy ranges from 5 to 10 metres 

Lineage

Description

The delineation of the seagrass meadows was conducted through Aerial Photograph Interpretation. The linework was digitized from stable base overlays plotted on 1:10,000 colour photo prints. Polygons were attributed with species and density by overlaying point seagrass observation data collected at sample sites in the field. 

Statement

Dataset Source: 1:20,000 Colour Aerial Photography enlarged to a scale of 1:10,000 Photography flown on 5th May, 1999 for the main Western Port waterbody. Photography for the Western Entrance flown 16 February, 2000 and additional photography from 11 January, 1998 used to assist in interpretation. Dataset Originality: Primary 

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
PERIM_M	O	N	NUMBER	22	5	0				PERIM_M
CLASS	O	N	NUMBER	22	3	0				CLASS
CLASS_DESC	O	N	VARCHAR2	100						CLASS_DESC
SUMM_DESC	O	N	VARCHAR2	75						SUMM_DESC
MAP_CAT	O	N	VARCHAR2	150						MAP_CAT
AREASQM	O	N	NUMBER	22	15	4				AREASQM

About the Metadata Record

Metadata identifier

urn:uuid / c6d52fe7-1d81-5889-ac94-7315c911f383