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Corridors - Cessnock LGA
The Department of Planning provides support to Local Government to enable evidence-based planning decisions. Biodiversity and Conservation Division collaborated with Cessnock City Council in 2021-2022 to deliver environmental map layers (Environmental Lands Study) that facilitate council’s review of their Local Environment Plan. This dataset is one of those and provides a scientifically valid structural connectivity analysis for the 196,468-hectare Cessnock Local Government Area (LGA) at fine/local scale using evidence-based data. The connectivity analysis was conducted at multiple raster scales then combined into a final vector format with accuracy commensurate to a scale range of 1:500 to 1:1000. This connectivity analysis is one aspect of biodiversity information that maps the current state of biodiversity movement at a scale that can inform local planning decisions. This dataset was derived using the Spatial Links analysis tool described in the mapping of habitat linkages study by M. Drielsma et al. (2007) because it overcomes some of the limitations of GAP CLoSR. The Spatial Links tool does not require nodes for patches because it can assess each cell in a patch as a start/endpoint. Additionally, Spatial Links overcomes any limitations of addressing the infinitely variable and complex spatial configuration of any landscape. A more detailed examination of the Spatial Links methodology compared to other analytical techniques is discussed in the detailed studies of connectivity for planning by M. J. Drielsma et al. (2022). This study adopted the 106 m gap-crossing threshold and overcame the singular 1100m maximum dispersal threshold by applying multiple scales that addressed a range of dispersal distances to cater for varying ecological traits of fauna and flora. The final dataset results from the Spatial Links analysis at fine scale across the Cessnock LGA buffered by 1km to avoid any abrupt termination of connectivity at the edges of the LGA.
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Woody Extent Vegetation - Cessnock LGA. VIS ID 5123
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The Department of Planning provides support to Local Government to enable evidence-based planning decisions. Biodiversity and Conservation Division collaborated with Cessnock City Council in 2021-2022 to deliver environmental map layers (Environmental Lands Study) that facilitate council’s review of their Local Environment Plan. This dataset is one of those and delineates woody vegetation at fine scale across the 196,468-hectare Cessnock Local Government Area (LGA). All tenures were mapped excluding National Parks and Wildlife Service (NPWS) estate because they are formally reserved and protected under Local Environment Plans and were outside of the scope of the Environmental Lands Study. Data is in vector format and was produced to a scale range of 1:500 – 1:3000 and captures individual trees or shrubs with diameters down to 3m whilst excluding and eliminating shadow effects. The dataset is an accurate fine-scale baseline woody dataset for the Cessnock LGA that is current with the image dates of 2017-19 in the east and 2011 for a small area in the far west. From here on the layer will require maintenance and updating as landuse and landcover changes over time. However, the layer’s accuracy means that maintenance and update requirements are minimal in terms of mapping expertise and resources. Either field verified data or newer high-resolution imagery can be used to perform maintenance and updating of the layer.
Streambanks 3rd Order Strahler and Above - Cessnock LGA
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The Department of Planning provides support to Local Government to enable evidence-based planning decisions. Biodiversity and Conservation Division collaborated with Cessnock City Council in 2021-2022 to deliver environmental map layers (Environmental Lands Study) that facilitate council’s review of their Local Environment Plan. This dataset is one of those and maps all streambanks of larger streams in the 196,468-hectare Cessnock Local Government Area using the Strahler system to identify stream type. All tenures were mapped excluding National Parks and Wildlife Service (NPWS) estate because they are formally reserved and protected under Local Environment Plans and were outside of the scope of the Environmental Lands Study. Data is in vector format and was produced to a scale range of 1:500 – 1:3000. The process for delineating streambanks for the Cessnock LGA began by mapping stream order, then adding LiDAR and NearMap imagery as a basemap. The technique of hillshading was then used to show the streambank top edge and topographic features of streambanks. All streams higher than 2nd order were buffered by 100m to create the area of interest (AoI) for mapping streambanks. High resolution Light (or Laser) Detection and Ranging (LiDAR) was converted to a hillshade to facilitate the delineation of 3rd order and above streambanks. Streambanks were mapped at a scale of 1:3,000 as lines using a pen graphic tablet and the dataset saved to a file geodatabase.
Streambanks 3rd Order Strahler and Above 40m Buffer - Cessnock LGA
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The Department of Planning provides support to Local Government to enable evidence-based planning decisions. Biodiversity and Conservation Division collaborated with Cessnock City Council in 2021-2022 to deliver environmental map layers (Environmental Lands Study) that facilitate council’s review of their Local Environment Plan. This dataset is one of those and maps all streambanks of larger streams in the 196,468-hectare Cessnock Local Government Area using the Strahler system to identify stream type. All tenures were mapped excluding National Parks and Wildlife Service (NPWS) estate because they are formally reserved and protected under Local Environment Plans and were outside of the scope of the Environmental Lands Study. Data is in vector format and was produced to a scale range of 1:500 – 1:3000. The process for delineating streambanks for the Cessnock LGA began by mapping stream order, then adding LiDAR and NearMap imagery as a basemap. The technique of hillshading was then used to show the streambank top edge and topographic features of streambanks. All streams higher than 2nd order were buffered by 100m to create the area of interest (AoI) for mapping streambanks. High resolution Light (or Laser) Detection and Ranging (LiDAR) was converted to a hillshade to facilitate the delineation of 3rd order and above streambanks. Streambanks were mapped at a scale of 1:3,000 as lines using a pen graphic tablet and the dataset saved to a file geodatabase. Streambanks were then buffered by 40m (as required by the Water Management Act 2000) and any areas where streambanks where more than 80m apart were eliminated.
Vegetation Mapping Mosaic - Cessnock LGA. VIS ID 5122
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The Department of Planning provides support to Local Government to enable evidence-based planning decisions. Biodiversity and Conservation Division collaborated with Cessnock City Council in 2021-2022 to deliver environmental map layers (Environmental Lands Study) that facilitate council’s review of their Local Environment Plan. This dataset is one of those and is a consolidated vegetation mosaic refined by an accurate and fine scale Woody Non-woody (WNW) layer to enhance the spatial accuracy of the data. An audit of existing vegetation products was conducted and 11 datasets were selected for inclusion based upon their quality, currency and level of supporting validation information. Vegetation units from all 11 datasets were translated to the Eastern NSW PCT Classification (Connolly et al., 2021) that is publicly available as of June 2022. The vegetation mosaic contains all original and legacy information from each of the 11 contributing datasets where that information existed. The vegetation mosaic also contains the original translations to the pre-June 2022 PCT's that was undertaken by Cockerill et al. (2013) Both classifications are now linked to DPE’s full floristic survey data (734 plots) that occur within the Cessnock LGA. These are referenced to ground truth data that also have associated Threatened Ecological Communities assigned.
Cessnock Environment Layer
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This single layer captures critical environmental features and biodiversity persistence for Cessnock Local Government Area (LGA) which covers 196,468 ha. The layer is in raster format with a 2 × 2 m cell size and is the result of consolidating layers that capture all aspects of biodiversity. Those consolidated layers contributed species composition information, structure/condition of habitat, and ecological function attributes at the same scale and with a common scoring. The common scale and scoring system allowed for direct comparison, making it possible to combine them into one single environment layer using a peer-reviewed scientific methodology.
Study Area - Biodiversity Management Plan Cessnock Area
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The Cessnock Regional Biodiversity Management Plan constitutes the national regional recovery plan under the Environment Protection and Biodiversity Conservation Act 1999 for threatened species and ecological communities principally distributed in the Northern Rivers Region of NSW. The Plan is part of an Australian Government-funded pilot to trial the integration of regional recovery and threat abatement planning. It provides a regional approach to the delivery of recovery actions necessary to ensure the long-term viability of threatened species and ecological communities in the Region. The Biodiversity Management Plan Study Area boundary for Cessnock is the Cessnock Local Government Area boundary.
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