IMAS Metadata Catalogue
Gold Coast Broadwater Seagrass mapping 2005/08
Seagrass meadows within the Broadwater were mapped using high-resolution 2005 orthorectified color aerial photography obtained from the Gold Coast City Council at a scale of 1:10,000 and pixel size 0.15 m. Using desktop GIS mapping (MapInfo Professional 8.0), polygons were drawn over all potential seagrass meadows at a scale of 1:5000. Spatial accuracy was estimated to be approximately ± 1 m on well-defined boundaries (e.g. dense seagrass meadows) and ± 2 m along poorly defined boundaries (e.g. sparse seagrass meadows).
Simple
Identification info
- Date (Publication)
- 2017-04-27
- Date (Creation)
- 2013-10-29
Author
Environmental Futures Research Institute (EFRI), Griffith University (GU) - Castley, Guy, Dr (Senior Research Fellow)
Griffith School of Environment, Griffith University
Gold Coast campus
Gold Coast
Queensland
4222
Australia
- Status
- Completed
Point of contact
Global Change Institute (GCI), The University of Queensland (UQ) - Robert Franklin C. Canto (Coastal Carbon WP4 Research Officer)
Global Change Institute Building
Top of Staff House Road
St Lucia
Queensland
4072
Australia
- Spatial representation type
- Vector
Spatial resolution
Equivalent scale
- Denominator
- 5000
- Topic category
-
- Biota
- Environment
Extent
N
S
E
W
))
Temporal extent
- Time position
- 2005-01-01T00:00:00
- Time position
- 2008-12-31T00:00:00
- Maintenance and update frequency
- Not planned
Resource format
- Title
- ESRI Shapefile
- Date
- Edition
- -
- Global Change Master Directory (GCMD) Earth Science Keywords Version 8.0
- Keywords (Place)
-
- QUEENSLAND
- Keywords (Theme)
-
- Benthic habitat
Resource specific usage
- Specific usage
- Data supplied for use by the Seamap Australia Project.
- ()
Resource constraints
- Classification
- Unclassified
Resource constraints
- Linkage
-
http://i.creativecommons.org/l/by-sa/4.0/88x31.png
License Graphic
- Title
- Creative Commons Attribution-ShareAlike 4.0 International License
- Website
-
http://creativecommons.org/licenses/by-sa/4.0/
License Text
- Other constraints
- Cite data as: Cuttriss, A.K., Prince, J.B., Castley. (2013): Gold Coast Broadwater Seagrass mapping 2005/08. Griffith University-Gold Coast Campus Qld 4222 Australia, Gold Coast City Council PO Box 5042 Gold Coast Mail Centre Qld 9729 Australia.
- Other constraints
- This dataset is hosted by the Institute for Marine and Antarctic Studies (IMAS), University of Tasmania, on behalf of Griffith University for the purposes of the Seamap Australia collaborative project (testing a national marine benthic habitat classification scheme).
- Language
- English
- Character encoding
- UTF8
- Supplemental Information
- Roelfsema, Christiaan M; Lyons, Mitchell B; Kovacs, Eva M; Maxwell, Paul; Saunders, Megan I; Samper-Villarreal, Jimena; Phinn, Stuart R (2014): Multi-temporal mapping of seagrass cover, species and biomass: A semi-automated object based image analysis approach. Remote Sensing of Environment, 150, 172-187, doi:10.1016/j.rse.2014.05.001 Roelfsema, Christiaan M; Phinn, Stuart R; Udy, Nicola; Maxwell, Paul (2009): An integrated field and remote sensing approach for mapping Seagrass Cover, Moreton Bay, Australia. Journal of Spatial Science, 54(1), 45-62, doi:10.1080/14498596.2009.9635166
Content Information
- Content type
- Physical measurement
- Description
- Taxonomic identification seagrass and algal species
Identifier
- Description
- Appended to original data for styling purposes for the Seamap Australia Project.
- Name
-
Benthic habitat
- Name
-
SM_HAB_CLS
Distribution Information
- Distribution format
-
-
ESRI Shapefile
-
ESRI Shapefile
- OnLine resource
-
SHAPE-ZIP
DATA ACCESS - This OGC WFS service returns the data (Gold Coast seagrass) in Shapefile format.
- OnLine resource
-
seamap:SeamapAus_QLD_GoldCoast_seagrass
MAP - Gold Coast seagrass
- OnLine resource
-
Original metadata record [TERN catalogue]
Resource lineage
- Statement
- Mapping description: Seagrass meadows within the Broadwater were mapped using high resolution 2005 orthorectified color aerial photography obtained from the Gold Coast City Council at a scale of 1:10,000 and pixel size 0.15 m. Using desktop GIS mapping (MapInfo Professional 8.0), polygons were drawn over all potential seagrass meadows at a scale of 1:5000. Spatial accuracy was estimated to be approximately ± 1 m on well-defined boundaries (e.g. dense seagrass meadows) and ± 2 m along poorly defined boundaries (e.g. sparse seagrass meadows). Seagrass coverage estimation: Each of the areas of seagrass mapped in the Broadwater during this study was sampled in 2008/09 to verify the presence of seagrass communities. A total of 359 sampling points within seagrass polygons were randomly chosen from the digitised maps. At each sampling point a variety of categorical parameters were recorded to quantify seagrass communities present within a 1 m² quadrat. Seagrass cover was categorised as follows; 0% none, 1–25% sparse, 26–50% medium, 51–75% medium-dense, 76–100% dense. Individual species were classified as either being dominant, secondary or minor-based on seagrass coverage. Presence/absence of macroalgae / Lyngbya was also recorded at each plot. Data fields: Below is a brief description of each data field in the Gold Coast seagrass shapefile. Area Extent of each seagrass patch calculated in hectares (ha). Density Categorical classification of seagrass cover in each patch – captured as either dense (D), medium-dense (MD), medium (M), or sparse (S). Count The number of survey plots within any one mapped seagrass polygon. Patch_ID Unique number for each seagrass patch mapped (n=166). Perimeter Calculated perimeter of each mapped seagrass patch. SG_Cover_ Average total seagrass cover estimate for each mapped seagrass patch expressed as a percentage value. Zost_muel Cover of Zostera muelleri in the mapped seagrass patch survey plots, expressed as a percentage (see above). Halo_oval Cover of Halophila ovalis in the mapped seagrass patch survey plots, expressed as a percentage (see above). Halo_spin Cover of Halophila spinulosa in the mapped seagrass patch survey plots, expressed as a percentage (see above). Halo_unin Cover of Halodule uninervis in the mapped seagrass patch survey plots, expressed as a percentage (see above). Cymo_serr Cover of Cymodocea serrulata in the mapped seagrass patch survey plots, expressed as a percentage (see above). Syri_isoe Cover of Syringodium isoetifolium in the mapped seagrass patch survey plots, expressed as a percentage (see above). Macroalgae Binary presence / absence of any macroalgal species from within the survey plots of any mapped seagrass patch. Lyngbya Binary presence / absence of the blue-green algae Lyngbya majuscule from within the survey plots of any mapped seagrass patch. Depth Water depth (m) averaged across all plots surveyed within any mapped seagrass patch. Spp_Rich Species richness of seagrass communities recorded during surveys of plots within any mapped seagrass patch.
- Hierarchy level
- Dataset
Process step
- Description
- Data analysis and summary information: For each seagrass patch mapped the seagrass information was summarised by averaging information from all plots surveyed in each patch. To provide a quantitative measure of overall patch cover categorical measures (see above) were converted into numerical values by taking the mean of the range specified, i.e. Dense = 88%, Medium-Dense = 63%, Medium = 38%, Sparse = 12.5%. For individual species categorical measures of cover in a plot were also converted to numerical values (dominant = 60%, secondary = 30%, minor = 10%) before being averaged for each patch. These summary values are captured in the data fields in the final seagrass shapefile.
- Hierarchy level
- Dataset
Platform
Identifier
- Code
- research aeroplane
Metadata
- Metadata identifier
-
3B4BAEF1-5B54-41B7-A2BA-DC59B16DB059
- Language
- English
- Character encoding
- UTF8
Point of contact
- Parent metadata
Type of resource
- Resource scope
- Dataset
- Metadata linkage
-
https://metadata.imas.utas.edu.au/geonetwork/srv/eng/catalog.search#/metadata/3B4BAEF1-5B54-41B7-A2BA-DC59B16DB059
Point of truth URL of this metadata record
- Date info (Creation)
- 2020-09-23T12:26:34
- Date info (Revision)
- 2020-09-23T12:26:34
Metadata standard
- Title
- ISO 19115-3:2018
Overviews
Spatial extent
N
S
E
W
Provided by
Associated resources
Not available