Title

Victorian Wetlands listed in - A Directory of Important Wetlands in Australia 

Alternate title

WETLANDDIR 

Purpose

Wetlanddir provides a spatial representation of wetlands listed in 'A Directory of Important Wetlands in Australia'. Directory entries cover a diverse range of wetlands including lakes, dams, swamps, rivers, floodplains. alpine bogs and estuaries. A directory entry may include a discrete wetland or a complex of several wetlands. 

Supplemental Information

Relationship to other Datasets: Closely tied to WETLAND_1994 and the HYDRO100 layer. The relevant line form HYDRO100, HYDRO25, HYDROP100, HYDROP25, COAST25, VIC100, PLMMT100, EVC100, VEG25, RAMSAR100, WETLAND_1788 and TOPO25 are added to the linework from the WETLAND_1994 layer. Current Design Issues: Although this dataset was derived mainly from the WETLAND_1994, any data based on linework had to be buffered to create polygons before they could be appended and dissolved so that all wetlands with the same NREid and EAid were grouped together. Additional data was also taken from the WETLAND_1788, HYDRO100, HYDRO25, HYDROP100, HYDROP25, COAST25, PLMMT100, VEG25, EVC100, VIC100 and TOPO25 layer for wetlands which were smaller than 1 hectare and for the rivers and streams data. This layer has been specifically designed to be used with 'A Directory of Important Wetlands in Australia', however specific information on some of the wetlands can be obtained from the WETLAND_1994 layer and associated tables (eg Victorian wetland categories, names, grid references). A related layer is the RAMSAR100 layer. Related Documents: 'A Directory of Important Wetlands of Australia' 3rd edition (2001). - null Environment Australia (2001) 'A Directory of Important Wetlands in Australia' 3rd Edition, Environment Australia, Canberra. http://www.ea.gov.au/water/wetlands/database/index.html 

Status

Completed  

Horizontal Accuracy

25m  

Code

4283 

Maintenance and update frequency

Irregular  

Topic category

• Inland waters
• Biota

Use limitation

. 

Classification

Unclassified  

Statement

Dataset Source: 1:100,000 linework form WETLAND_1994 in the CGDL 1:100,000 linework form WETLAND_1788 in the CGDL 1:100,00 hydro arcs from HYDRO100 in the CGDL 1:25,000 hydro arcs from HYDRO25 in the CGDL 1:100,00 hydro arcs from HYDROP100 in the CGDL 1:25,000 hydro arcs from HYDROP25 in the CGDL 1:25,000 linework from TOPO25 in the CGDL 1:25,000 linework from COAST25 in the CGDL 1:100,000 linework from PLMMT100 in the CGDL 1:25,000 linework from VEG25 in the CGDL 1:100,000 linework from EVC100 in the CGDL 1:100,000 linework from VIC100 in the CGDL 1:100,000 linework from RAMSAR100 in the CGDL Dataset Originality: Derived 

Description

Collection Method: Derived data used existing data layers in CGDL 

Description

Relevant HYDRO100, HYDRO25, HYDRO100, HYDRO25, VIC100 lines were buffered at 25m, 50m, 100m or 200m depending on the polygons required. TOPO25 lines were used to edit a PLMMT100 polygon. The PAT and AAT for all the datasets were edited and then the polygons were appended then dissolved. 

Classification

Unclassified  

Attribute Quality

Comments

Complete 

Positional Accuracy

Comments

Linework in the WETLANDS_1994, WETLANDS_1788, HYDRO100, HYDRO25, HYDROP100, HYDROP25, PLMMT100, COAST25, VEG25, EVC100, VIC100, RAMSAR100 and TOPO25 were selected for this layer. The WETLAND_1994 layer precision is 10m to 100m. Ad-hoc comparisons with 1:25,000 layer data showed good correlation in shape and size, but with errors of the order indicated above in terms of position and/or rotation. 

Conceptual Consistency

Comments

Good 

Missing Data

Comments

All wetlands and streams which are listed in the directory of important wetlands 

Excess Data