Metadata Name Description
Resource Name: VMVEG_TREE_DENSITY
Title: Tree Density 1:25,000 - Vicmap Vegetation
Anzlic Id: ANZVI0803003127
Custodial Program: Land Use Victoria
Custodian: Department of Environment, Land, Water & Planning
Abstract: A presence/absence tree cover dataset is derived from SPOT Panchromatic imagery (10m pixels) by a combination of digital classification and visual interpretation . The presence/absence dataset is then grouped into three density classes (Dense, Medium, Scattered) by neighbourhood and proximity cell based analysis. The raster dataset is converted to vector as a final step.

The process of grouping tree cover into density classes simplifies the representation of trees and reduces the complexity of the vector dataset. It is a particularly neat way of representing scattered tree cover. The original, ungrouped raster dataset is maintained as a separate dataset.

Classifying SPOT Panchromatic imagery for vegetation can be limiting as the panchromatic image only encompasses a small portion of the infrared part of the electromagnetic spectrum. However, the image sharpness and detail offered makes the trade off between spectral range and spatial resolution worth while for mapping tree cover at 1:25,000.

Tree cover is defined as woody vegetation greater than 2 metres in height and with a crown cover (foliar density) greater than 10 percent.
Search Words: FORESTS, PHOTOGRAPHY AND IMAGERY Satellite, LAND Cover, VEGETATION
Nominal Input Scale: 1:25,000
Currency Date: 29 June 2019
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/
Data is available under a Creative Commons licence. Locality size area is available via Land Channel web site www.depi.vic.gov.au/vicmapdata or large volumes via DEPI Data Service Providers www.depi.vic.gov.au/vicmapdsp or DataVic www.data.vic.gov.au
Data Existence:
Metadata Name Description
Resource Name: VMVEG_TREE_DENSITY
Title: Tree Density 1:25,000 - Vicmap Vegetation
Anzlic Id: ANZVI0803003127
Custodian: Department of Environment, Land, Water & Planning
Owner: Department of Environment, Land, Water & Planning
Jurisdiction: Victoria
Abstract: A presence/absence tree cover dataset is derived from SPOT Panchromatic imagery (10m pixels) by a combination of digital classification and visual interpretation . The presence/absence dataset is then grouped into three density classes (Dense, Medium, Scattered) by neighbourhood and proximity cell based analysis. The raster dataset is converted to vector as a final step.

The process of grouping tree cover into density classes simplifies the representation of trees and reduces the complexity of the vector dataset. It is a particularly neat way of representing scattered tree cover. The original, ungrouped raster dataset is maintained as a separate dataset.

Classifying SPOT Panchromatic imagery for vegetation can be limiting as the panchromatic image only encompasses a small portion of the infrared part of the electromagnetic spectrum. However, the image sharpness and detail offered makes the trade off between spectral range and spatial resolution worth while for mapping tree cover at 1:25,000.

Tree cover is defined as woody vegetation greater than 2 metres in height and with a crown cover (foliar density) greater than 10 percent.
Search Words: FORESTS, PHOTOGRAPHY AND IMAGERY Satellite, LAND Cover, VEGETATION
Purpose: TREE_DENSITY is intended to show both the presence and density of tree cover at 1:25,000 scale. The potential uses are many, however, the initial purpose is to provide a detailed, comprehensive and consistent statewide dataset from which tree cover monitoring can be based. TREE_DENSITY provides the most detailed statewide picture of tree cover available to date and is an excellent source of data for any applications requiring the identification of small patches of remnant tree cover such as connectivity analyses and habitat modelling. The scattered density category provides a first in the representation of scattered woodlands and sparse tree cover. The dataset also lends itself well to map presentation and makes an excellent backdrop for other thematic information shown on maps.
Geographic Extent Polygon:
Geographic Bounding Box:
-34
141
 
150
-39
Beginning Date: 04MAR1991
Ending Date: 01OCT2001
Maintainence and Update Frequency: Irregular
Stored Data Format: Digital Arc/Info Revision 7.2.1 Librarian Layer
Available Format(s) Types: Digital Arc/Info and Arcview Non Digital Printed Maps
Lineage: Derived
Positional Accuracy: The positional accuracy, determined by the geometric rectification of the source SPOT Panchromatic images, and reported as Root Mean Square Error, is up to 1.5 pixels. As the images have 10 meter pixel resolution, this translates to 15 meters.
Atribute Accuracy: The three density classes are derived by automated grid cell processing, thereby ensuring consistency. The attribute accuracy of the density classes is solely dependent on the accuracy of the SPOT Panchromatic image classifications. The "Level" polygon attribute has been added as an indicator of the classification accuracy.
Logical Consistency: All polygons are automatically generated in a raster to vector conversion. All polygons are closed and labelled consistently. All relationships between attributes are logical.
Data Source: SPOT Panchromatic Imagery (10m pixels)
Completeness:
Contact Organisation: Department of Environment, Land, Water & Planning
Contact Position: Dataset Data Manager
Address: Vicmap Product Manager
East Melbourne  Vic 3002
Australia
Telephone: .
Facsimile: .
Email Address: vicmap.help@delwp.vic.gov.au
Metadata Date: 2019-09-04 00:00:00.0
Additional Metadata: An Arc/Info coverage for each AMG zone contains details of all SPOT Panchromatic images used, including image date, image name and extent of image used. These coverages are maintained in project: p_t25/covers and are named meta-index54 and meta-index55. Further image details can be obtained from the Image Archive Access Database maintained by LIG.
Resource Name: VMVEG_TREE_DENSITY
Title: Tree Density 1:25,000 - Vicmap Vegetation
Object Name: VMVEG.TREE_DENSITY
Column Name Column Name 10 Obligation Unique Data Type Reference Table Comments
CREATE_DATE_UFI CRDATE_UFI M N DATE Data UFI was created.
FEATURE_RELIABILITY_CODE M N VARCHAR2(5) VMREFTAB.RS_FEATURE_RELIABILITY The reliability of the mapped feature. FEATURE_RELIABILITY_CODE Options: Ver=Verified, Unver=Unverified, Unkwn=Unknown.
FEATURE_TYPE_CODE FTYPE_CODE M N VARCHAR2(30) Type of Feature. FEATURE_TYPE_CODE Options: Forest
SOURCE_BEGIN_DATE M N DATE The earliest date at which the data was sourced
SOURCE_END_DATE M N DATE The latest date at which the data was sourced
SOURCE_ORGANISATION_CODE M N VARCHAR2(3) VMREFTAB.RS_ORGANISATION Name of organisation that supplied the source data SOURCE_ORGANISATION_CODE Options: 10=DEPI, 11=DPI
SOURCE_TYPE_CODE M N VARCHAR2(2) VMREFTAB.RS_SOURCE_TYPE Data source of the mapping of tree cover. SOURCE_TYPE_CODE Options: 10=Satellite 11=Aerial Photography
TREE_DENSITY M N VARCHAR2(10) VMREFTAB.VG_TREE_DENSITY Tree cover density TREE_DENSITY Options: Dense, Medium, Scattered
UFI UFI M Y NUMBER(14) Database wide Unique Feature identifier. Assigned at every feature creation or edit, superseded by each edit to the feature.