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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 style=''text-align:justify;''>The dataset was initially broken up roughly the 13 Catchment Management Authority boundaries (as at 2012). This was simply a data size management step, and the catchment boundaries generally followed hydrology. The edges of the subsets were checked, so the hydro lines stayed within the correct subset for water flow.</p><p style=''text-align:justify;''>These catchments were often further broken down into smaller hydrological sub-catchments if the dataset remained to large. There were issues with the RivEx processing time if there were too many features processed at once. Checks were done to make sure no line appeared in more than one subset.</p><p style=''text-align:justify;''>Catchment subsets were processed in order of stream flow, so 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 streamlines that flowed into NSW waterways were extracted (by complete catchment) and processed in exactly the same way as the NSW hydrolines data. Queensland was processed first so the Strahler results could be incorporated in the northern catchments of the state. Victoria was done before the Murray &amp; LMD areas in case those Strahler numbers were going to impact the Murray River stream order.</p><p> A summarised workflow is provided below: </p><ul><li>The 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>The output dataset: Hydro Line (2012) Strahler Stream Order Classification</li></ul><p>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 Hydro Line (2012) Strahler Stream Order Classification spatial dataset is a valuable tool for analysing river and stream networks, however, it has some limitations 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 cannot be used in relation to any regulation policy. This dataset will be used to visualise the stream order only. Any regulation and policy matters, please refer to the information and procedure stated in the Water Management (General) Regulation 2018 Hydro Line (https://water.dpie.nsw.gov.au/our-work/licensing-and-trade/controlled-activity-approvals/waterfront-land-e-tool/hydro-line-spatial-data) dataset. </li><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 studies.</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 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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51420853-A504-4E2B-AC31-324E2F715008 |
| minScale:
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0 |
| spatialReference:
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WGS_1984_Web_Mercator_Auxiliary_Sphere |