Water/Hydro_Line_2012_Strahler_Stream_Order_Classification (FeatureServer)

View In: ArcGIS JavaScript ArcGIS Online Map Viewer

Service Description: 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.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.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.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.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. A summarised workflow is provided below: The input dataset: 2012 DCS NSW Hydro LineBreak the input dataset into manageable catchments for processingComplete topology checks (ArcMap) on catchment subsetsUndertake basic hydrological enforcement by flipping geometric line directions where required to align with stream flow / class order direction.Run Strahler processing (RivEX)Undertake visual quality assurance of results &amp; manually resolve issues.Recombine catchments to assemble a statewide datasetThe output dataset: Hydro Line (2012) Strahler Stream Order ClassificationNote: Victorian and Queensland data was also sought (best available) so accurate Strahler assessments at the State borders could be assessed.

All Layers and Tables

Has Versioned Data: false

MaxRecordCount: 2000

Supported Query Formats: JSON

Supports Query Data Elements: true

Layers:

Hydro Line 2012 Strahler Stream Order Classification (0)

Description: 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.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.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.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.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. A summarised workflow is provided below: The input dataset: 2012 DCS NSW Hydro LineBreak the input dataset into manageable catchments for processingComplete topology checks (ArcMap) on catchment subsetsUndertake basic hydrological enforcement by flipping geometric line directions where required to align with stream flow / class order direction.Run Strahler processing (RivEX)Undertake visual quality assurance of results &amp; manually resolve issues.Recombine catchments to assemble a statewide datasetThe output dataset: Hydro Line (2012) Strahler Stream Order ClassificationNote: Victorian and Queensland data was also sought (best available) so accurate Strahler assessments at the State borders could be assessed.

Service Item Id: 14901540b1b7451998008e966a745364

Copyright Text:

Spatial Reference: 102100 (3857) LatestVCSWkid(0)

Initial Extent:

Full Extent:

Units: esriMeters

Document Info:

Enable Z Defaults: false

Supports ApplyEdits With Global Ids: false

Support True Curves : true

Only Allow TrueCurve Updates By TrueCurveClients : true

Supports Return Service Edits Option : true

Supports Dynamic Layers: false

Child Resources: Info Uploads Query Data Elements Relationships

Supported Operations: Query Query Contingent Values QueryDomains Apply Edits Extract Changes Get Estimates