From Victoria Government
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2010 Index of Stream Condition - Fragmentation polygon features

Created 05/05/2025

Updated 05/05/2025

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The ISC2010_FRAGMENTATION polygon features represent gap areas in vegetation cover in the 40m Riparian Zone (defined as 40m from ISC2010_STREAMBED_WIDTH) . The gap crietria is defined as any area where vegetation cover is less than 20% for at least 10m x 10m. This data set is derived from source Fractional Cover raster data and has been clipped to a 40m buffer of Stream Bed. Small polygons (<10m2) resulting from the clip process have been excluded from the Fragmentation 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.

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Additional Info

Field Value
Title 2010 Index of Stream Condition - Fragmentation polygon features
Language English
Licence Creative Commons Attribution 3.0 Australia
Landing Page https://devweb.dga.links.com.au/data/dataset/0c801fd8-027c-4023-ad41-dffb3b5302da
Remote Last Updated 03/04/2025
Contact Point
Department of Energy, Environment and Climate Action
test@email.loc
Reference Period 01/02/2018
Geospatial Coverage http://www.ga.gov.au/place-names/PlaceDetails.jsp?submit1=GA7
Data Portal data.gov.au

Data Source

This dataset was originally found on Victoria Government "2010 Index of Stream Condition - Fragmentation polygon features". Please visit the source to access the original metadata of the dataset:
https://discover.data.vic.gov.au/dataset/2010-index-of-stream-condition-fragmentation-polygon-features

Original dataset
Dataset copies

No duplicate datasets found.