2010 Index of Stream Condition - Channel Transect line features

The ISC2010_CHANNEL_TRANSECTS are line features created perpendicular to the river centreline that span the width of ISC2010_BANKFULL_WIDTH polygons. Channel Transects occur every 25m along all reaches. Every fourth Channel Transect coicides with a 100m River Section break. Channel Transects are used to assess and record cross sectional statistics. Channel Transects are represented as two dimensional lines but contain three dimensional cross sectional attributes such as channel area and volume.

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.

Data and Resources

2010 Index of Stream Condition - Channel Transect line features

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Additional information

Field Value
Date Published 2010-06-01
Date Updated 2017-01-01
Agency Department of Environment, Land, Water & Planning
License Creative Commons Attribution 4.0 International
[Open Data]
Citation Copyright © The State of Victoria, Department of Environment, Land, Water & Planning 2017
Attribution Copyright © The State of Victoria, Department of Environment, Land, Water & Planning 2017
Data Temporal Coverage: 2010-06-01 to 2012-12-01
Geospatial Coverage 141,-39,150,-34
Geospatial Scale 1:5,000
Geospatial Accuracy Each Transect is uniquely identified and recorded with reference to the Basin and Reach ID that it belongs to. +/- 1m
Full Metadata URL http://services.land.vic.gov.au/catalogue/metadata?anzlicId=ANZVI0803005114&publicId=guest&extractionProviderId=1
Recent Downloads Count 1 (September 2014)

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