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
 

Simple

 
 

Description

Title
2010 Index of Stream Condition - Structure 2 Reach Summary Table 
Alternate title
ISC2010_STRUCTURE2_R 
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/ 
Status
Completed  
 
 

Temporal

 
 

Spatial

Code
4283 
 
 

Maintenance

Maintenance and update frequency
Not planned  
 
 

Format

 
 

Contacts

  Point of contact

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Cited responsible party  

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Keywords

Topic category
  • Elevation
  • Inland waters
  • Imagery base maps earth cover
  • Transportation
 
 

Resource Constraints

Classification
Unclassified  
 
 

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 
 
 

Metadata Constraints

Classification
Unclassified  
 
 

Quality

Attribute Quality
Comments
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. 
Positional Accuracy
Conceptual Consistency
Comments
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
Comments
Every Reach has had attributes summarised and a Score determined. 
Excess Data
 
 

Acquisition Info

 
 

Raster Data Details

 
 

Point Cloud Data Details

 
 

Contour Data Details

 
 

Survey Details

 
 

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