Contacts

Identifiers and Keywords

ANZLIC Id

ANZVI0803004034 

Victorian Spatial Data Library (VSDL) Schema

MARINE1:SEAGRASS_PORT_PHILLIP_BAY_2000 

Jurisdiction

Victoria 

Topic category

• Biota

Resource Constraints

Use limitation

. 

Classification

Unclassified  

Creative Commons Attribution 4.0 (CC-BY)

• 
• License Text

Other Dataset Details

Date ( Revision )

2015-11-25

Date ( Publication )

2018-01-23T12:45:17

Status

Completed  

Purpose

SEAGRASS_PORT_PHILLIP_BAY_2000 is a 1:25,000 layer that represents spatial extent, species distribution and density of seagrass and other aquatic vegetation within Port Phillip Bay. This layer forms part of a baseline survey of seagrass within Victoria. Ecological research into the health of seagrass meadows requires the type of detailed information collected in this baseline survey. 

Credit

David Ball and 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 State-wide program to map seagrass throughout Victoria. Other seagrass layers exist for Gippsland Lakes, Corner Inlet/Nooramunga, Western Port and minor inlets of eastern Victoria (originally planned as a single layer, but now separated into individual 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 Port Phillip Bay. The area of coverage and density of the various species of seagrass changes with time, both seasonally and yearly. Future Design Issues: These may include adding extra species and recording the condition of the seagrass in relation to epiphyte coverage. Related Documents: None 

Maintenance and update frequency

As needed  

Maintenance date ( Publication )

2018-01-23T12:45:17

Spatial

Spatial representation type

Vector  

Reference system identifier

4283

Temporal

Begin date

2000-03-01 

End date

2000-12-01 

Resolution

Horizontal Accuracy

25m  

Quality

Conceptual Consistency

Attributes checked by DPI Queenscliff 

Missing Data

This layer is complete for Port Phillip Bay 

Attribute Quality

All attributes have been verified by DPI Queenscliff, and are complete. 

Positional Accuracy

Horizontal 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 from data collected at sample sites in the field (see PPB_SEAGR25 Field Work layers). Polygons were ground-truthed in the field by direct observation of the seabed from a submersible pod in small vessel. 

Statement

Dataset Source: 1:20,000 Colour Aerial Photography enlarged to a scale of 1:10,000 Photography flown on 25th and 31st March 2000, and 2nd and 3rd of April 2000. 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
MAP_CLASS	O	N	NUMBER	22	8	0				MAP_CLASS
AREASQM	O	N	NUMBER	22	12	0				AREASQM
HAB_DESC	O	N	VARCHAR2	50						HAB_DESC
MAP_TEXT	O	N	VARCHAR2	100						MAP_TEXT
CLASS_DESC	O	N	VARCHAR2	100						CLASS_DESC
SUMM_DESC	O	N	VARCHAR2	50						SUMM_DESC
CLASS	O	N	NUMBER	22	8	0				CLASS
SUB_TYPE	O	N	VARCHAR2	5						SUB_TYPE
HAB_CODE	O	N	NUMBER	22	8	0				HAB_CODE
SUB_DESC	O	N	VARCHAR2	50						SUB_DESC
PERIM_M	O	N	NUMBER	22	6	0				PERIM_M

About the Metadata Record

Metadata identifier

668c567c-0539-54ae-81a5-46f13e015233

Resource Type

Dataset  

Date info ( Revision )

2015-11-25

Standard Name

ISO 19115-3:2018 

Profile Name

DELWP Profile 

Profile Version

Version 1 

Profile Date

2019-05-24  

Metadata Constraints

Classification

Unclassified