2010 Index of Stream Condition - Stream Bed Width Reach polygon features

dataset: ISC2010_STREAMBED_WIDTH_R
The ISC2010_STREAMBED_WIDTH polygon features represent the width between the Toe of each opposing bank for each River Reach. 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 - Stream Bed Width Reach polygon features

Department of Environment, Land, Water & Planning
 

Simple

 
 

Description

Title
2010 Index of Stream Condition - Stream Bed Width Reach polygon features 
Alternate title
ISC2010_STREAMBED_WIDTH_R 
Purpose
Used in conjunction with ISC2010_BANKFULL_WIDTH, ISC2010_STREAMBED_WIDTH is used to denote the bank face which is then used in various metric assessments. This feature is also used as the reference point from which the 40m riparian zone is measured. 
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

Horizontal Accuracy
50m  
Code
4283 
 
 

Maintenance

Maintenance and update frequency
Not planned  
 
 

Format

 
 

Contacts

  Point of contact

Cited responsible party  

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Cited responsible party  

No information provided.
 
 

Keywords

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

Resource Constraints

Classification
Unclassified  
 
 

Lineage

Statement
Dataset Source: Streambed Width is dervied from ISC2010_TOE_OF_BANK line data set. The toe of bank lines have been closed at the reach ends to form the Streambed Width polygons. Toe of Bank lines were mapped directly from LiDAR derived Slope and DTM data sets and aerial photography. Dataset Originality: Derived 
 
 

Metadata Constraints

Classification
Unclassified  
 
 

Quality

Attribute Quality
Comments
The UniqueID that describes the Basin and Reach Number is complete for every Reach. 
Positional Accuracy
Comments
+/- 1-2m 
Conceptual Consistency
Comments
Streambed Width has been mapped the same way across the entire ISC2010 network. 
Missing Data
Comments
Streambed Width has been mapped for the entire ISC2010 network. Polygons do not overlap at reach ends. 
Excess Data
 
 

Acquisition Info

 
 

Raster Data Details

 
 

Point Cloud Data Details

 
 

Contour Data Details

 
 

Survey Details

 
 

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