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This dataset represents a stream network (centreline) of features both natural and artificial across NSW, classified using the Strahler Stream Order method, undertaken by the Department in 2013. This is a legacy, best endeavours dataset based upon a static (2012) copy of the now NSW Department of Customer Services (DCS) | Spatial Services: NSW Hydro Line. Today this data forms part of the NSW Digital Topographic Database and NSW Foundation Data Framework administered by DCS. Classification of the stream network was completed using the 'RivEX' tool (www.rivex.co.uk) in combination with ESRI ArcMap by the Departments Geospatial practitioners |
| summary:
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This dataset represents a stream network (centreline) of features both natural and artificial across NSW, classified using the Strahler Stream Order method, undertaken by the Department in 2013. This is a legacy, best endeavours dataset based upon a static (2012) copy of the now NSW Department of Customer Services (DCS) | Spatial Services: NSW Hydro Line. Today this data forms part of the NSW Digital Topographic Database and NSW Foundation Data Framework administered by DCS. Classification of the stream network was completed using the 'RivEX' tool (www.rivex.co.uk) in combination with ESRI ArcMap by the Departments Geospatial practitioners |
| extent:
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[[140.971652015,-37.4908417079999],[159.10322072,-28.123411161]] |
| accessInformation:
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| thumbnail:
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thumbnail/thumbnail.png |
| maxScale:
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1.7976931348623157E308 |
| typeKeywords:
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["ArcGIS","ArcGIS Server","Data","Map Service","Service"] |
| description:
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<p style=''text-align:justify;''>This dataset represents a stream network (centreline) of features both natural and artificial across NSW, classified using the Strahler Stream Order method, undertaken by the Department in 2013.</p><p style=''text-align:justify;''>This is a legacy, best endeavours dataset based upon a static (2012) copy of the now NSW Department of Customer Services (DCS) | Spatial Services: NSW Hydro Line. Today this data forms part of the NSW Digital Topographic Database and NSW Foundation Data Framework administered by DCS.</p><p style=''text-align:justify;''>Classification of the stream network was completed using the 'RivEX' tool (<a href='&apos'>www.rivex.co.uk</a>) in combination with ESRI ArcMap by the Departments Geospatial practitioners.</p><p><b>Method</b></p><p style=''text-align:justify;''>The dataset was initially broken down against 13 Catchment Management Authority (CMA) catchment boundaries (as at 2012), or smaller subsets to aid RivEx processing, which closely aligned to hydrological catchments. The edges of the subsets were checked to ensure hydro lines fell within the correct hydrological unit.</p><p style=''text-align:justify;''>Catchments were processed (classified) in order of stream flow to ensure the order at the end of one catchment was used as the beginning of any it flowed into.</p><p style=''text-align:justify;''>For Victorian and Queensland datasets - any stream that flowed into NSW waterways were extracted (by complete catchment) and processed in exactly the same way as the NSW hydro lines data. Queensland was processed first so the Strahler results could be incorporated in the northern catchments of NSW. Victorian streams were processed before the NSW Murray &amp; Lower Murray Darling areas to ensure continuity of stream order application in NSW. </p><p> A summarised workflow is provided below: </p><ul><li>Input dataset: 2012 DCS NSW Hydro Line</li><li>Break the input dataset into manageable catchments for processing</li><li>Complete topology checks (ArcMap) on catchment subsets</li><li>Undertake basic hydrological enforcement by flipping geometric line directions where required to align with stream flow / class order direction.</li><li>Run Strahler processing (RivEX)</li><li>Undertake visual quality assurance of results &amp; manually resolve issues.</li><li>Recombine catchments to assemble a statewide dataset</li><li>Output dataset: Hydro Line (2012) Strahler Stream Order Classification NSW</li></ul><p style=''margin-left:18pt;''>Note: Victorian and Queensland data was also sought (best available) so accurate Strahler assessments at the State borders could be assessed.</p> |
| licenseInfo:
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<p style=''text-align:justify;''>Although the NSW Hydro Line (2012) Strahler Stream Order Classification spatial dataset is a valuable tool for analysing river and stream networks, it should be noted several limitations exist that should be considered when using it for hydrological or environmental studies. These limitations stem from the methodology of stream ordering, the resolution of the dataset, the potential for data inaccuracies and legal regulations.</p><p><b>Implications for Users:</b></p><ul><li><b>Legal Limitations:</b> This dataset should not be used in relation to any regulation or policy. It is an indicative best endeavour attempt to classify the NSW network. This dataset should only be used for strategic assessment and visualisation only<a>.</a></li></ul><p style=''margin-left:36pt;'>Any matters involving stream positioning and stream order in relation to the NSW Water Management (General) Regulation 2018 should follow the advice noted here: <a href='&apos'>https://www.dpie.nsw.gov.au/water/our-work/licensing-and-approvals/controlled-activity-approvals/waterfront-land-e-tool/hydro-line-spatial-data</a>, noting the application of a different stream network and process to identify stream order.</p><ul><li><b>Accuracy Limitations</b>: The dataset is suitable for general stream network analysis but may not be precise enough for detailed hydrological modelling or site-specific assessment.</li><li><b>Supplementary Data Required</b>: For comprehensive analysis, this dataset should be assessed against and combined with other datasets such as high-resolution Digital Elevation Models (DEM), flow data, and ecological/geomorphic survey.</li><li><b>Context Awareness</b>: Users should be aware of local conditions, including human modifications and natural variability, that might affect the interpretation of the data.</li></ul><p style=''text-align:justify;''>By understanding these limitations, users can better assess the suitability of the NSW Hydro Line (2012) Strahler Stream Order Classification spatial<b> </b>dataset for their specific applications and make informed decisions when integrating it into hydrological or environmental studies.</p> |
| catalogPath:
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| title:
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Hydro_Line_2012_Strahler_Stream_Order_Classification |
| type:
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Map Service |
| url:
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| tags:
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["Hydro Line","Strahler","Stream Order","NSW Rivers","SEED-Layer-Catalogue"] |
| culture:
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en-AU |
| portalUrl:
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| name:
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Hydro Line 2012 Strahler Stream Order Classification |
| guid:
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B5D6B27A-166F-4985-875B-9A4F7B9DECD6 |
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0 |
| spatialReference:
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WGS_1984_Web_Mercator_Auxiliary_Sphere |