2010 Index of Stream Condition - Structure 2 Reach Summary Table

dataset: ISC2010_STRUCTURE2_R
The ISC2010_STRUCTURE2_R table is the Statistical Summary table for the Structure2 Metric at the Reach level. Structure 2 represents vertical vegetation layering or structure and considers 6 height intervals: 1.5m to 5m, 5m to 10m, 10m to 15m, 15m to 20m, 20m to 25m and >25m. Structure 2 is assessed within the 40m riparian zone. The ISC2010_STRUCTURE2_R table is designed to JOIN to the ISC2010_RIVER_CENTRELINES_R feature class. River condition in Victoria is assessed every 5 years using the Index of Stream Condition (ISC). The Department of Environment and Primary Industries (DEPI) developed a methodology to assess the Physical Form and Riparian Vegetation components of the ISC using remote sensing data, specifically LIDAR and aerial photography. A State Wide mapping project was undertaken in 2010-13 to accurately map the Physical Form and Riparian Vegetation metrics of the ISC . Other ISC metrics were not assessed in the project and were derived from other sources. The Physical Form and Riparian Vegetation Metric products are a combination of mapped Vector and Raster data as well as Tabular Summary Statistics about the mapped features. In the context of the project, the term Metrics is used to refer to both the mapped features and the summary statistics. Remote sensing data used includes 15cm true colour and infra-red aerial photography and four return multi-pulse LiDAR data. This source data was used to derive a variety of Raster data sets including Digital Terrain Models, Slope, Vegetation Height and Vegetation Cover. The Digital Terrain and Slope rasters were used to map Physical Form metrics including Stream Bed, Top of Bank and River Centre Lines while the Vegetation Height and Cover rasters were used to map the Riparian Vegetation metrics. The Project Report "Aerial Remote Sensing for Physical Channel Form and Riparian Vegetation Mapping" describes the remote sensing and mapping approach used to create this data set.
 
Citation proposal Citation proposal
(2014)

2010 Index of Stream Condition - Structure 2 Reach Summary Table

Department of Environment, Land, Water & Planning
 

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Identifiers and Keywords

ANZLIC Id
ANZVI0803005135 
Victorian Spatial Data Library (VSDL) Schema
WATER:ISC2010_STRUCTURE2_R 
Jurisdiction
Victoria 
Topic category
  • Elevation
  • Inland waters
  • Imagery base maps earth cover
  • Transportation
 

Resource Constraints

Classification
Unclassified  
Creative Commons Attribution 4.0 (CC-BY)
 

Other Dataset Details

Date ( Revision )
2014-02-04
Date ( Publication )
2018-02-01T00:00:00
Status
Completed  
Purpose
The purpose of the Structure2_R table is to summarise the set of vegetation height attributes for at the Reach level and to store a Structure2 Score for the Structure2 metric. The Structure 2 metric scores are based on an assessment of Observed versus Expected number of vegetation height classes in the 40m riparian zone. The expected number of height classes is dependent on the Ecological Vegetation Class (EVC). The Reach Summary Table is designed to facilitate a JOIN with the ISC2010_RIVER_CENTRELINES_R feature class. 
Supplemental Information
Related Documents: None The Product Description "ISC2010 Remote Sensing Metrics" describes the remote sensing and mapping approach used to create this and all other ISC2010 data sets. http://ics.water.vic.gov.au/ics/ http://ics.water.vic.gov.au/ics/ 
Maintenance and update frequency
Not planned  
Maintenance date ( Publication )
2018-02-01T00:00:00
 

Spatial

Spatial representation type
Text, table  
Description
General - Victoria 
Reference system identifier
4283

N
S
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W


 

Temporal

Begin date
2010-06-01 
End date
2012-12-01 
 

Quality

Conceptual Consistency
Every Reach is represented in the table. The ISC2010_STRUCTURE2_R table is designed to JOIN to the ISC2010_RIVER_CENTRELINES_R feature class. 
Missing Data
Every Reach has had attributes summarised and a Score determined. 
Attribute Quality
The UniqueID that describes the Basin and Reach Number for each Reach is complete for every Reach. Every Reach has been summarised and had a Score determined. 
 

Lineage

Statement
Dataset Source: The Structure 2 Summary table was programmatically generated based on analysis of Fractional Cover Count raster data sets derived from LiDAR source data and the Ecological Vegetation Class (EVC). 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
BASINID O N NUMBER 22 10 0 BASINID
REACH_SCORE O N NUMBER 22 4 0 RSCORE
SIDE O N VARCHAR2 50 SIDE
REACHID O N NUMBER 22 10 0 REACHID
BIOREGION O N VARCHAR2 50 BIOREGION
EVC O N NUMBER 22 4 0 EVC
CATCHMENT O N VARCHAR2 50 CATCHMENT
REACH_LENGTH O N NUMBER 22 38 8 REACHLENG
ANABRANCHID O N NUMBER 22 10 0 ANABRNCHID
MEAN_NUM_HT_CLASSES O N NUMBER 22 38 8 AVHGTCL
UNIQUEID O N VARCHAR2 50 UNIQUEID
MEAN_NUM_HT_CLASSES_BOTH_SID_9 O N NUMBER 22 38 8 AVHGTCL2S
MEAN_SECTION_DFE O N NUMBER 22 38 8 AVSECDFE
 

About the Metadata Record

Metadata identifier
urn:uuid / 91f37d52-5ba4-576e-a250-22c654ac6e7e

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Resource Type
Dataset  
Date info ( Creation )
2025-11-25T12:08:48
Date info ( Revision )
2025-11-25T14:34:26
Standard Name
ISO 19115-3:2018 
Profile Name
DELWP Profile 
Profile Version
Version 1 
Profile Date
2019-05-24  
 

Metadata Constraints

Classification
Unclassified  
 
 

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