Contacts

Identifiers and Keywords

ANZLIC Id

ANZVI0803002058 

Victorian Spatial Data Library (VSDL) Schema

FORESTS:OG100 

Jurisdiction

Victoria 

Topic category

• Biota

Resource Constraints

Use limitation

Access Subject to Custodian Approval Access Subject to Custodian Approval Access Subject to Custodian Approval 

Classification

Unclassified  

Creative Commons Attribution 4.0 (CC-BY)

• 
• License Text

Other Dataset Details

Date ( Revision )

2017-03-08

Date ( Publication )

2018-02-02T12:31:14

Status

Completed  

Purpose

OG100 is a layer designed to store the major modelled output of old-growth forest studies for Victoria. Modelled areas of old-growth forest are used as a major input into the preparation of Regional Forest Agreements and Forest Management Planning and associated analysis. 

Credit

Adam Gilbee, Bill Peel & Steve Farrell Natural Resource Systems Steve Farrell & Milos Pelikan Spatial Vision Peter Woodgate, Kim Ritman, Jane Coram, Bill Peel et al (East Gippsland Old Growth Forest Project 1994-95) Numerous NRE staff contributed to the project. 

Supplemental Information

Relationship to other Datasets: The old growth forest modelling process used to derive this layer uses key disturbance datasets, including GRAZE100, LOGHIST100, LOGHIST250, FIRE100_XY, AGCLEAR100 and mining layers, and vegetation attributes from the GSTAGE100, EVC100, SVEG100 layers. Current Design Issues: The old-growth modelling process is undertaken on a study areas basis with which each study applying different rules and inputs. It is possible that adjacent study areas within one tile may have edge matching problems. Future Design Issues: The current dataset does not assign an accuracy level to any polygon. This may need to be accomodated as areas of old-growth forest are increasingly verified in the field. Related Documents: None A Study of the Old-Growth Forest of East Gippsland, Woodgate et.al. 1994 Central Highlands Old-Growth Forest Project, Forests Service Technical Report 96-3 "Study of Old Growth Forest in Victorias Central Highlands", Forests Service Technical Report 96-3. "Stand Class Definitions and Polygon Labelling Guidelines for the State Forest Resource Inventory". Peter Elliot, Department of Conservation and Natural Resources 1996 "Study of Old-growth Forest in Victoria's North-East", forest Service technical report 98-1. "Old-growth Forest study of Gippsland Victora - Modelling of Old-growth Forrest Status". Study Report. Stephen Farrel & Milos Pelikan (Unpublished Report), 1999. "Old-growth Forrest Study of South - Western Victoria: Portland Wimmera and Otways- Midlands - Modelling of Old-growth Forest status", Study Report. Stephen Farrell and Milos Pelikan (Unpublished Report), 1999. https://www.delwp.vic.gov.au/__data/assets/pdf_file/0021/413094/3-Old-growth-forests-factsheet-FINAL.pdf 

Maintenance and update frequency

Not planned  

Maintenance date ( Publication )

2018-02-02T12:31:14

Spatial

Spatial representation type

Vector  

Reference system identifier

4283

Temporal

Begin date

1994-01-01 

End date

1999-01-01 

Resolution

Horizontal Accuracy

100m  

Quality

Conceptual Consistency

The Old-growth forest modelling is based on a set of logic rules. All forest categories have therefore been determined consistently within each study area. Some logical anomalies may exist where the modeling has been unable to cope with exceptions to the logic rules. The data is not reliable at scales less than 1:100,000 (ie 1:25,000), not all old-growth polygons have been confirmed by field checking and the reliability of the modelled linework has not been verified. 

Missing Data

Old Growth data from the East Gippsland, North East, Goldfields and Central Highlands studies have been completed. The Gippsland study area data will be available by January 1999. Old-growth forest data from the East Gippsland, North East, Central Highlands, Gippsland, Portland-Wimmera and Otways-Midlands studies have been completed. Data from the Gippsland ,Portland-Wimmera and Otways-Midlands studies will be incorporated into the library in September/October 2000. 

Attribute Quality

A preliminary estimate of attribute accuracy would be: 90% for polygons GT 10 hectares 75% for polygons LT 10 hectares 

Positional Accuracy

Precision: +/- 200 m Determination: Deductive estimate based on 30m grid cell size used and precision of historic disturbance datasets used. 

Lineage

Description

Refer to Old Growth Forest analysis project reports 

Statement

Dataset Source: Old Growth Forest modelling process for each old-growth forest studies including ; East Gippsland, Central Highlands,North_East, Gippsland, Portland-Wimmera and Otway-Midlands. Dataset Originality: Derived 

Attributes

Column Name	Obligation	Unique	Data Type	Data Length	Data Precision	Data Scale	Reference Table Owner	Reference Table Name	Reference Table Code Column Name	Short Column Name	Definition
HECTARES	O	N	NUMBER	22	18	2				HECTARES
AREASQM	O	N	NUMBER	22	18	2				AREASQM
OGSTUDY	O	N	NUMBER	22	10	0				OGSTUDY
X_OGDESC	O	N	VARCHAR2	80						X_OGDESC
X_OGSTUDY	O	N	VARCHAR2	50						X_OGSTUDY
OGCODE	O	N	NUMBER	22	10	0				OGCODE

About the Metadata Record

Metadata identifier

urn:uuid / fd8f9577-26eb-5ad4-a498-61a9e3c35c1a