Title

Native Vegetation Regulation Extent (2017) 

Alternate title

NVR2017_EXTENT 

Purpose

Native vegetation extent includes largely-intact areas typical of parks and state forests, and remnant patches and scattered trees typical of rural and peri-urban landscapes. Remnant patches retain some level of native understorey and scattered trees are mature native trees that are in a location without native understorey. Based on Native Vegetation extent data generated by ARI 2010-2015 Landsat time series data, with edits based on wetlands, addtional tree sites added from Native Vegetation Regulations source. 

Credit

Dataset Creators: Graeme Newell, Matt White & the Native Vegetation Review Team (Penny Croucamp with support from David Attard) 

Supplemental Information

Future Design Issues: None Proposed Related Documents: None 

Status

Completed  

Horizontal Accuracy

25m  

Code

4283 

Maintenance and update frequency

As needed  

Title

TIFF format 2 

Topic category

• Biota

Use limitation

General access. Email request to: data.vsdl@delwp.vic.gov.au to access this Grid dataset. 

Classification

Unclassified  

Statement

Dataset Source: The native vegetation extent map combines the results of two separate modelling and remote sensing tasks: a) the detection and characterisation of woody native vegetation (2010) b) the detection of predominantly native grasslands/pastures and wetland (2016). This has been modified by recent developments (2016) and scattered tree mapping. Dataset Originality: Primary & Derived 

Description

Collection Method: Remotely-sensed spectral data from satellite or air-borne sensors 

Description

The probability of a 10m (for woody vegetation) and 25m (for grassy vegetation) pixel cell containing native grassy vegetation was modelled separately using multi-spectral imagery from the various Landsat platforms (30m, various years 1989-2007), SPOT panchromatic (10m 1999), MODIS multi-year seasonal means (225m various years 1999-2010), RapidEye (5m 2010) and ALOS radar data (50m 2009-2010). This satellite sensor suite was 'trained' to distinguish woody vegetation from non-woody vegetation, native or non-native woody vegetation, or native grassy or other land cover type using many thousands of training sites and a machine learning algorithm (multi-objective regression trees). The native vegetation extent dataset combines the woody and grassy vegetation binary datasets along with DELWP's existing wetland data. 

Classification

Unclassified  

Attribute Quality

Comments

The data is notionally resolved to 10m pixels in accordance with the woody vegetation data, however, to facilitate data handling and processing by a range of users it has been resampled to 25m ensuring that single 10m pixels supporting woody native vegetation were not lost. 

Positional Accuracy

Comments

25m x 25m cells 

Conceptual Consistency

Missing Data

Comments

Victoria 

Excess Data

Comments

Categorical attributes: 1. Native vegetation cover* 2. Natural waterbodies** 3. Exotic -argely treeless 4. Exotic tree cover 5. Plantations, exotic amd other 6. Artificial impoundment *Native vegetation cover: grasslands and chenopod shrublands (including some wetlands), woody cover (including heaths and woody wetlands), and sparse cover **Natural waterbodies: open, non-woody wetlands and waterbodies