Metadata Name Description
Resource Name: SEAGRASS_PPB_9REGIONS_APRIL09
Title: Port Phillip Bay seagrass mapping at nine aerial assessment regions in April 2009
Anzlic Id: ANZVI0803004663
Custodial Program: Fisheries Victoria (DPI)
Custodian: Department of Jobs, Precincts and Regions
Abstract: This polygon layer represents seagrass habitat at nine regions in Port Phillip Bay in April 2009 mapped from aerial photography. The mapping was undertaken for the Baywide Seagrass Monitoring Program (CDP_ENV_MD_022 Rev5 - Port of Melbourne Corporation, 2010). The program is being undertaken for the Port of Melbourne Corporation as part of Baywide Monitoring to support the Channel Deepening Project.
Search Words: MARINE Coasts, ECOLOGY Ecosystem, ECOLOGY Habitat, FISHERIES Marine
Nominal Input Scale: 1:20,000 (minimum)
Currency Date: 23 January 2018
Dataset Status: Completed
Progress: Complete
Access Constraint: Creative Commons Attribution 4.0 International licence, Copyright and Attribution, Terms of Use - http://creativecommons.org/licenses/by/4.0/
General as agreed by PoMC, DPI, DSE
Data Existence:
Metadata Name Description
Resource Name: SEAGRASS_PPB_9REGIONS_APRIL09
Title: Port Phillip Bay seagrass mapping at nine aerial assessment regions in April 2009
Anzlic Id: ANZVI0803004663
Custodian: Department of Jobs, Precincts and Regions
Owner: Department of Jobs, Precincts and Regions
Jurisdiction: Victoria
Abstract: This polygon layer represents seagrass habitat at nine regions in Port Phillip Bay in April 2009 mapped from aerial photography. The mapping was undertaken for the Baywide Seagrass Monitoring Program (CDP_ENV_MD_022 Rev5 - Port of Melbourne Corporation, 2010). The program is being undertaken for the Port of Melbourne Corporation as part of Baywide Monitoring to support the Channel Deepening Project.
Search Words: MARINE Coasts, ECOLOGY Ecosystem, ECOLOGY Habitat, FISHERIES Marine
Purpose: The objective of the Baywide Seagrass Monitoring Program is to detect changes in seagrass health outside expected variability. Seagrass is being monitored at several spatial scales including aerial mapping undertaken annually in April/May. This data presents seagrass mapping from aerial photography at one of nine detailed aerial assessment regions established in the main seagrass areas in Port Phillip Bay. The seagrass mapping will be compared to the previous year's mapping and historic mapping to detect changes in percent cover outside expected variability. This dataset replaces SEAGRASS_ALTONA_2009, SEAGRASS_BLAIRGOWRIE_2009, SEAGRASS_CURLEWIS_BANK_2009, SEAGRASS_KIRK_POINT_2009, SEAGRASS_MUD_ISLANDS_2009, SEAGRASS_PT_HENRY_WEST_2009, SEAGRASS_PT_RICHARDS_2009, SEAGRASS_ST_LEONARDS_2009 and SEAGRASS_SWAN_BAY_2009.
Geographic Extent Polygon:
Geographic Bounding Box:
-34
141
 
150
-39
Beginning Date: 12APR2009
Ending Date: 22MAY2009
Maintainence and Update Frequency: Annual
Stored Data Format: DIGITAL: ESRI ArcSDE layer
Available Format(s) Types: DIGITAL: Standard GIS Vector layers
Lineage: Primary & Derived
Positional Accuracy: Description: Positional accuracy of the mapping is dependent on the accuracy of the source aerial photography, and the accuracy of the habitat boundaries is related to the mapping accuracy. Determination: The estimate of positional accuracy for the aerial photography was determined by comparison to known ground-control points. Overall mapping accuracy was determined by comparison with video-ground-truthing, and no quantitative measure of positional accuracy was undertaken.
Atribute Accuracy: Description: The habitat layer attributes describe the dominant habitat (substratum and vegetation) and vegetation density. The accuracy of the mapping was determined by comparison to point observations from underwater video. Determination: Overall mapping classification accuracy was determined by generating an error matrix from the video ground-truthing overlayed on the mapping. The overall mapping accuracies for the regions are: Altona-Point Cook: 100% based on 15 video ground-truthing points. Blairgowrie: 92% based on 25 video ground-truthing points. Curlewis Bank: 100% based on 9 video ground-truthing points. Kirk Point: 100% based on 3 video ground-truthing points. Mud Islands: 100% based on 13 video ground-truthing points. Point Henry West: 100% based on 12 video ground-truthing points. Point Richards-Bellarine Bank: 58% based on 26 video ground-truthing points. St Leonards: 50% based on 6 video ground-truthing points. Swan Bay: 77% based on 13 video ground-truthing points.
Logical Consistency: Polygon topology was created in ArcInfo and all polygons were checked to ensure they had labels and an attribute value.
Data Source: Aerial photography flown by AEROmetrex Pty Ltd from 12-13 April 2009 and video ground-truthing by DPI Queenscliff from 21 April-22 May 2009.
Completeness:
Contact Organisation: Department of Environment, Land, Water & Planning
Contact Position: Dataset Data Manager
Address: PO Box 500
East Melbourne   Vic 3002
Australia
Telephone: (03) 9637 8393
Facsimile: (03) 9637 8312
Email Address: biodiversity.info@dse.vic.gov.au
Metadata Date: 2015-11-25 00:00:00.0
Additional Metadata: Underwater video ground-truthing 2009, April 2009 aerial photography
Resource Name: SEAGRASS_PPB_9REGIONS_APRIL09
Title: Port Phillip Bay seagrass mapping at nine aerial assessment regions in April 2009
Object Name: MARINE1.SEAGRASS_PPB_9REGIONS_APRIL09
Column Name Column Name 10 Obligation Unique Data Type Reference Table Comments
AREA_M2 AREA_M2 O N NUMBER(15,2)
HABITAT HABITAT O N VARCHAR2(75)
HAB_CODE HAB_CODE O N NUMBER(4)
PERIM_M PERIM_M O N NUMBER(15,2)
REGION REGION O N VARCHAR2(50)