| Field | Value |
|---|---|
Title |
NSW coastal nearshore reef extent 2017 |
Abstract |
Nearshore reef extent was classified for the NSW coast using best-available high resolution aerial imagery. Statewide mapping of nearshore reef extent was performed from 2010 to 2017 along the entire NSW coastline using aerial imagery from governmental and commercial bodies. An understanding of the spatial extent and distribution of coastal habitats contributes critical baseline information to inform decision-making and strategic planning processes. |
Resource locator |
|
Data Quality Statement |
Name: Data Quality Statement Protocol: WWW:DOWNLOAD-1.0-http--download Description: Data quality statement for NSW coastal nearshore reef extent 2017 Function: download |
Nearshore features shapefile |
Name: Nearshore features shapefile Protocol: WWW:DOWNLOAD-1.0-http--download Description: Classification of nearshore features for NSW coast Function: download |
Imagery sources shapefile |
Name: Imagery sources shapefile Protocol: WWW:DOWNLOAD-1.0-http--download Description: Record of source imagery used to define features and scale of digitisation Function: download |
Unique resource identifier |
|
Code |
db195acd-460e-4d47-b6a6-8416d04ff183 |
Presentation form |
Map digital |
Edition |
2017 |
Dataset language |
English |
Metadata standard |
|
Name |
ISO 19115 |
Edition |
2016 |
Dataset URI |
https://datasets.seed.nsw.gov.au/dataset/db195acd-460e-4d47-b6a6-8416d04ff183 |
Purpose |
To support coastal research and management |
Status |
Completed |
Spatial representation |
|
Type |
vector |
Geometric Object Type |
complex |
Geometric Object Count |
35908 |
Spatial reference system |
|
Code identifying the spatial reference system |
4283 |
Equivalent scale |
1:None |
Additional information source |
This dataset was produced by Coastal and Marine Unit, Science Division, NSW Office of Environment and Heritage. For further information on this layer, please contact: Michelle Linklater Scientist, Coastal and Marine Unit Michelle.Linklater@environment.nsw.gov.au David Hanslow Senior Team Leader, Coastal and Marine Unit David.Hanslow@environment.nsw.gov.au |
| Field | Value |
|---|---|
Topic category |
| Field | Value |
|---|---|
Keyword set |
|
keyword value |
Coast Marine Habitat Subtidal Reef Substrate |
Originating controlled vocabulary |
|
Title |
ANZLIC Search Words |
Reference date |
2008-05-16 |
Geographic location |
|
West bounding longitude |
149.85402 |
East bounding longitude |
153.7109 |
North bounding latitude |
-37.54521 |
South bounding latitude |
-28.12897 |
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 |
2010-11-01 |
End position |
N/A |
Dataset reference date |
|
Resource maintenance |
|
Maintenance and update frequency |
Not planned |
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 |
Nearshore reef mapping was undertaken from 2010-2017 along the entire NSW coast. Features visible within the nearshore zone were digitised from a broad suite of high resolution aerial imagery in ArcMap v.10.1. Aerial imagery was sourced from NSW Land and Property Information as well as the commercial entities Nearmap™ and Google Earth™ (Table 1, Appendix 2). Ten feature classes were defined, with six categories for submerged features including: rocky reef, sand veneer/bare reef, sand, seagrass, pipelines and shipwrecks (Table 2). Land features, including beach sands and gravels, were digitised at a coarser scale as these were not the focus habitat for this study. |
| Field | Value |
|---|---|
Limitations on public access |
|
| Field | Value |
|---|---|
Scope |
dataset |
DQ Conceptual Consistency |
|
Effective date |
2017-03-16 |
Explanation |
This layer contains no feature duplications or overlaps. |
DQ Topological Consistency |
|
Effective date |
2017-03-16 |
Explanation |
The layers were cleaned and smoothed in ET Geowizards toolbox and the GIS package ArcInfo was used to do a topological consistency check to detect and correct flaws in the spatial data structure. |
DQ Absolute External Positional Accuracy |
|
Effective date |
2017-03-16 |
Explanation |
The most commonly employed scale of map digitisation was a map scale of 1:2,000, with a minimum mapping unit of 0.7 m2. Due to the variability in sediment movement, precise reef boundaries can be variable over time. |
DQ Non Quantitative Attribute Correctness |
|
Effective date |
2017-03-16 |
Explanation |
The method of feature classification involved preliminary classification with confidence categories assigned (low/medium/high). Low confidence areas re-assessed for inclusion or exclusion. This dataset represents maximum reef extent visible through the available imagery, with no groundtruthing undertaken. Reef extent was digitised from multiple sources across multiple dates, and in this manner caution must be taken when interpreting trends between mapped regions. Future applications of this dataset must appropriately consider the caveats of the dataset and assess whether the layer is fit for purpose. |
| 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 |
2024-02-26T14:53:01.009971 |
Metadata language |
|