Title

Structural Vegetation (1995) 

Alternate title

SVEG100 

Purpose

This layer has been produced to provide a non tenure specific structural vegetation layer for the state. SVEG100 has been used to service requirements of the NFI (National Forest Inventory), MDBC (Murray Darling Basin Commission) old growth forest and tree cover studies, but will have wider application for planning activities within NRE. This layer effectively supercedes the older SVEG100_1993 layer and replaces the former LCCVEG100 layer which has been removed from the CGDL. 

Credit

Rick Frisina and Susanne Thulin, LIG 

Supplemental Information

Relationship to other Datasets: The layer shares spatial boundaries and derives attributes from a number of library layers including TREE100_9095, TREE100, LSYS250 and LCCVEG100 as well as data from the Box-Ironbark and River Murray Vegetation Mapping projects. The extent of tree cover has been delineated using 1993 tree cover information for the east and north-west of the State, which the 1995 tree cover dataset (TREE100) has been used in the more recently completed south western section. Current Design Issues: To maintain primary structural vegetation attributes in a form that can easily be translated to other vegetation classification schemes. Tree cover boundaries need to conform to those is the TREE100_9095 layer. Future Design Issues: The addition of a forest type item that can group similar structural vegetation classes into common forest types would enable to the data to be presented in a similar form to the old LCC map series more easily. Related Documents: None SVEG100 - Explanatory Notes. On Departmental file : 94/3886-1, NRS Branch. This document details how existing datasets and new data (including data capture methods) were used to create SVEG100. 

Status

Completed  

Horizontal Accuracy

64m  

Code

4283 

Maintenance and update frequency

Unknown  

Topic category

• Biota
• Farming

Classification

Unclassified  

Statement

Dataset Source: 1993 and 1995 Landsat TM, LCCVEG100, PLANTN100, TREE100_9095, FEBOX25, TREE100, River Murray Riparian Vegetation Data, original forest commission maps/artwork and published LCC maps. Dataset Originality: Primary & Derived 

Description

Collection Method: Areial Photo interpretation, Satellite imagery and field notes 

Description

The processing follows the same steps used for SVEG100_1993. A forest type dataset is "cookie cut" with a current version of tree cover to transfer the forest attributes to the accurately defined tree cover boundaries. For SVEG100, 1995 tree cover boundaries (sourced from TREE100_9095) have been used as the "cookie cut" dataset. Therefor, the areas previously mapped in SVEG100_1993 should only differ to SVEG100 in tree boundaries, not in forest attributes. 

Classification

Unclassified  

Attribute Quality

Positional Accuracy

Comments

Precision: 100-500m (for existing data sources) up to 1km (for mapping on freehold land). Determination: Based on drafting and digitizing error for existing data sources and field verification for mapping on freehold land. 

Conceptual Consistency

Comments

The linework from the existing data sources used varies in detail due to the different mapping scales of the data. Attributes are consistent across whole dataset and their logical associations have been verified. 

Missing Data

Comments

Mapping is complete for the entire State. 

Excess Data