Contacts

Identifiers and Keywords

ANZLIC Id

ANZVI0803004938 

Jurisdiction

Victoria 

Topic category

• Inland waters
• Biota
• Geoscientific information

Resource Constraints

Use limitation

General 

Classification

Unclassified  

Creative Commons Attribution 4.0 (CC-BY)

• 
• License Text

Other Dataset Details

Date ( Revision )

2021-07-14

Status

Completed  

Purpose

The GDE density grid was intersected with the Natureprint Biodiversity grid - such that a gridded dataset of density_value was generated (i.e. GDE_Dent_Value). 

Format

DIGITAL: ESRI ASCII GRID, JPEG2000 2 

Supplemental Information

Related Documents: None 

Maintenance and update frequency

As needed  

Spatial

Spatial representation type

Grid  

Description

General - Victoria 

Reference system identifier

4283

N

S

E

W

Temporal

Begin date

2011-08-02 

End date

2012-03-30 

Quality

Conceptual Consistency

Not known 

Missing Data

Victoria 

Attribute Quality

Not known 

Positional Accuracy

Not known 

Lineage

Statement

Dataset Source: The original GDE dataset was produced by Dresel et al. (2010) in vector format. The vector dataset was converted to a 25m x 25m raster grid by intersecting the grid with the vector dataset and querying for the presence (= 1) or absence (= 0) of a mapped terrestrial GDE. This grid was aggregated up to 100 m x 100 m grid size (i.e. 16 smaller grids were combined to 1 large grid) and the density of terrestrial GDEs within this larger grid was calculated by the number of 25m x 25m grids that recorded the presence of a GDE through the previous step. The minimum density was 0 (i.e. 0 out of 16 smaller grids recorded a GDE within the larger grid) and the maximum density was 16 (i.e. 16 out of 16 smaller grids recorded a GDE within the larger grid). Density classification was undertaken using a 1km proximity radius. The cells that did not record a GDE were excluded prior to the density classification. The final GDE dataset has been classified as follows: 0 = No Terrestrial GDE 1 = Low Density Terrestrial GDE 2 = Low-Medium Density Terrestrial GDE 3 = Medium Density Terrestrial GDE 4 = High Density Terrestrial GDE The Natureprint V2 datasets was generated using the following process: NPv2 works with 168 spatial models of ecosystem types, site records of approximately 800 rare or threatened species, a statewide vegetation condition model and a statewide landscape context model. The Zonation software ranks each 75m x 75m pixel in terms of its importance in solving the central objective of retaining equal representation (in terms of area) of each biodiversity asset (i.e. ecosystem types and rare or threatened species sites) across the state. As lowly ranked cells are removed, Zonation recalculates the statewide priorities. To further mediate the cell ranking process: (1) a coarse aggregation has been employed - cells can only be removed from edges. That is, at each cell removal iteration the sequence is controlled by the interface between already removed and currently retained cells; (2) Site condition (as per DEPI's vegetation condition model) has been used to distinguish otherwise equally ranked sites on the basis of their modelled condition; (3). For regions of the state that do not support native vegetation, landscape context has been used to distinguish otherwise equally ranked sites on the basis of superior context. To create the final dataset, the GDE density grid was intersected with the Natureprint Biodiversity grid - such that a gridded dataset of density_value was generated. Dataset Originality: Derived 

About the Metadata Record

Metadata identifier

35606aff-3c6e-5104-b979-b94fb91782fc

Resource Type

Dataset  

Date info ( Revision )

2021-07-14

Standard Name

ISO 19115-3:2018 

Profile Name

DELWP Profile 

Profile Version

Version 1 

Profile Date

2019-05-24  

Metadata Constraints

Classification

Unclassified