| Field | Value |
|---|---|
Title |
Woody Extent Vegetation - Cessnock LGA. VIS ID 5123 |
Abstract |
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. |
Resource locator |
|
Data Quality Statement |
Name: Data Quality Statement Protocol: WWW:DOWNLOAD-1.0-http--download Description: Data quality statement for Woody Vegetation - Cessnock LGA Function: download |
Cessnock Environmental Lands Study |
Name: Cessnock Environmental Lands Study Protocol: WWW:DOWNLOAD-1.0-http--download Description: The Department of Climate Change, Energy, the Environment and Water’s Biodiversity, Conservation and Science – Regional Delivery collaborated with Cessnock City Council in 2021 to 2022 to deliver a report and package of spatial data layers to inform an environmental lands study. It comprises 6 comprehensive map layers that collectively cover the entire Cessnock Local Government Area (LGA) and identify lands of environmental or ecological value. Function: download |
Download Package |
Name: Download Package Protocol: WWW:DOWNLOAD-1.0-http--download Description: Data (Shapefile and Geodatabase) Function: download |
Unique resource identifier |
|
Code |
b957b962-a2a2-4dc9-8460-c8e6ec0f5dbf |
Presentation form |
Map digital |
Edition |
1 |
Dataset language |
English |
Metadata standard |
|
Name |
ISO 19115 |
Edition |
2016 |
Dataset URI |
https://datasets.seed.nsw.gov.au/dataset/b957b962-a2a2-4dc9-8460-c8e6ec0f5dbf |
Purpose |
Biodiversity assessment, mapping refinement and legislative planning. |
Status |
Completed |
Spatial representation |
|
Type |
vector |
Spatial reference system |
|
Code identifying the spatial reference system |
4283 |
Spatial resolution |
3 m |
| Field | Value |
|---|---|
Topic category |
| Field | Value |
|---|---|
Keyword set |
|
keyword value |
LAND-Cover VEGETATION |
Originating controlled vocabulary |
|
Title |
ANZLIC Search Words |
Reference date |
2008-05-16 |
Geographic location |
|
West bounding longitude |
150.80129 |
East bounding longitude |
151.62356 |
North bounding latitude |
-33.13904 |
South bounding latitude |
-32.65055 |
NSW Place Name |
Cessnock LGA |
Vertical extent information |
|
Minimum value |
-100 |
Maximum value |
2228 |
Coordinate reference system |
|
Authority code |
urn:ogc:def:cs:EPSG:: |
Code identifying the coordinate reference system |
5711 |
Temporal extent |
|
Begin position |
2021-01-07 |
End position |
N/A |
Dataset reference date |
|
Resource maintenance |
|
Maintenance and update frequency |
As needed |
Contact info | |
Contact position |
Data Broker |
Organisation name |
NSW Department of Climate Change, Energy, the Environment and Water |
Telephone number |
131555 |
Email address |
|
Web address |
https://www.nsw.gov.au/departments-and-agencies/dcceew |
Responsible party role |
pointOfContact |
| Field | Value |
|---|---|
Lineage |
The dataset is an accurate fine-scale (1:500 – 1:3000) 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. All analyses were undertaken using the Geographic Information System “ArcMap” and Python programming language. Automated and manual procedures were used to finalise the dataset. The automated process produced an initial woody vegetation mask from remotely sensed data as a 1Bit raster with two classes, 0 for cleared and 1 for woody vegetation. A Python based algorithm was developed to create an initial and accurate vegetation mask so that ensuing manual editing was minimised. The algorithm was designed to eliminate non-vegetation responses such as shadows, false vegetation responses, roof buildings, water bodies, roads, and high reflectance objects. The initial vegetation mask for each tile was manually refined using ESRI’s ArcScan extension. The extension was designed to vectorise hardcopy maps and has very efficient raster editing tools. Editing in ArcScan is a two-step process, first is to manually refine raster edges/boundaries and the last step is vectorisation with comprehensive parameters to control the degree of line smoothing. Editing for most of the LGA was conducted with high accuracy due to delineation against high resolution Nearmap imagery with 6 cm pixel resolution. A very small area in the western section used 50cm ADS40 imagery where Nearmap imagery was unavailable. As a result of the higher resolution imagery, minimum woody tree/shrub size was 3 metre diameter crown or greater than 12 metres squared (0.00012 hectares). Final data production was the conversion the refined raster data to vector polygon using ArcScan’s vectorising and line smoothing functionality. 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. |
| Field | Value |
|---|---|
Limitations on public access |
|
| Field | Value |
|---|---|
Responsible party |
|
Contact position |
Data Broker |
Organisation name |
NSW Department of Climate Change, Energy, the Environment and Water |
Telephone number |
131555 |
Email address |
|
Web address |
https://www.nsw.gov.au/departments-and-agencies/dcceew |
Responsible party role |
pointOfContact |
| Field | Value |
|---|---|
Metadata point of contact |
|
Contact position |
Data Broker |
Organisation name |
NSW Department of Climate Change, Energy, the Environment and Water |
Telephone number |
131555 |
Email address |
|
Web address |
https://www.nsw.gov.au/departments-and-agencies/dcceew |
Responsible party role |
pointOfContact |
Metadata date |
2024-08-27T22:06:17.951298 |
Metadata language |
|