Distribution of Seagrass in Western Port in 1999

dataset: SEAGRASS_WESTERN_PORT_1999
SEAGRASS_WESTERN_PORT_1999 is a polygon layer defining the spatial extent, species distribution and density of seagrass and macroalgae in Western Port mapped from aerial photography in 1999.
 
Citation proposal Citation proposal

(2015)

Distribution of Seagrass in Western Port in 1999

Victorian Fisheries Authority

Description

Title
Distribution of Seagrass in Western Port in 1999 
Alternate title
SEAGRASS_WESTERN_PORT_1999 
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 
Status
Completed 
 
 

Spatial

Horizontal Accuracy
25m 
Code
4283 
 
 

Maintenance

Maintenance and update frequency
Not planned 
 
 

Contacts

  Point of contact

Cited responsible party

No information provided.

Cited responsible party

No information provided.

Cited responsible party

No information provided.
 
 

Keywords

Topic category
  • Oceans
 
 

Resource Constraints

Use limitation
General Access 
Classification
Unclassified 
Creative Commons Attribution 4.0 (CC-BY)
 
 

Lineage

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 
Description
Collection Method: Remote Sensing - Aerial Photography and Field Measurements 
Description
Source description not available 
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. 
 
 

Metadata Constraints Metadata Constraints

Classification
Unclassified 
 
 

Quality

Attribute Quality
Comments
All attributes have been checked by DPI Queenscliff, and are complete 
 
Positional Accuracy
Comments
Horizonal accuracy ranges from 5 to 10 metres 
 
Conceptual Consistency
Comments
Not determined 
 
Missing Data
Comments
This layer is complete for Western Port 
 
Excess Data
 
 

Overviews

Graphic Overview of Data Footprint


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