2010 Index of Stream Condition - River Centre Lines at the Reach Level

dataset: ISC2010_RIVER_CENTRELINES_R
The ISC2010_RIVER_CENTRELINE_R line features represent the set of river reaches that are assessed in the 2010 ISC. The line features represents the middle of the river channel and have been defined as the midpoint of the ISC2010_STREAMBED_WIDTH polygon feature. This data set represents a re-alignment of the ISC2004 River Reaches. River centre lines have been connected at Reach ends and flow direction has been enforced. Each Reach has Metric Statistics assessed and recorded in Reach Summary (_R) Tabes. The ISC2010_RIVER_CENTRELINE_R is designed to JOIN to all ISC2010_<METRIC>_R tables. The ISC2010_RIVER_CENTRELINE_REACH acts as the spatial key to which all other Physical Form and Riparian Vegetation reach metric statistics can be linked. 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 - River Centre Lines at the Reach Level

Department of Environment, Land, Water & Planning
 

Simple

 
 

Description

Title
2010 Index of Stream Condition - River Centre Lines at the Reach Level 
Alternate title
ISC2010_RIVER_CENTRELINES_R 
Purpose
The ISC2010_RIVER_CENTRELINE_REACH defines the river unit for which ISC scoring is reported. Every Reach is uniquely identified by a combination of Basin and Reach number in the "UniqueID" attribute which can be used to join any of the tabular metric summary statistics. As such, the ISC2010_RIVER_CENTRELINE_REACH is the spatial key for all metrics. 
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

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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 centre line has been automatically generated as the midpoint of the ISC2010_Stream_Bed_Width polygon feature. The source data for Stream Bed Width is LiDAR derived raster products including Slope and DTM. 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. The UniqueID will facilitate a join with all 2010 ISC Reach Metric Summary Tables (ISC2010_<METRIC>_R). 
Positional Accuracy
Comments
+/- 1m 
Conceptual Consistency
Comments
River Centrelines have been mapped the same way across the entire ISC2010 network. Water storage connectors are attributed with a Reach number of -99. The ISC2010_RIVER_CENTRELINE_R is designed to JOIN to all ISC2010_<METRIC>_R tables. 
Missing Data
Comments
River Centrelines have been mapped for the entire ISC2010 network. River centrelines have been connected at reach ends and flow direction has been enforced. 
Excess Data
 
 

Acquisition Info

 
 

Raster Data Details

 
 

Point Cloud Data Details

 
 

Contour Data Details

 
 

Survey Details

 
 

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