Primary Coastal Sediment Compartments  

Authors / CoAuthors

McPherson, A. | Hazelwood, M. | Moore, D. | Owen, K. | Nicoll, S.

Abstract

The Primary Coastal Sediment Compartment data set represents a regional-scale (1:250 000 - 1:100 000) compartmentalisation of the Australian coastal zone into spatial units within (and between) which sediment movement processes are considered to be significant at scales relevant to coastal management. The Primary and accompanying Secondary Coastal Sediment Compartment data sets were created by a panel of coastal science experts who developed a series of broader scale data sets (Coastal Realms, Regions and Divisions) in order to hierarchically subdivide the coastal zone on the basis of key environmental attributes. Once the regional (1:250 000) scale was reached expert knowledge of coastal geomorphology and processes was used to further refine the sub-division and create both the Primary and Secondary Sediment Compartment data sets. Environmental factors determining the occurrence and extents of these compartments include major geological structures, major geomorphic process boundaries, orientation of the coastline and recurring patterns of landform and geology - these attributes are given in priority order below. 1 - Gross lithological/geological changes (e.g. transition from sedimentary to igneous rocks). 2 - Geomorphic (topographic) features characterising a compartment boundary (often bedrock-controlled) (e.g. peninsulas, headlands, cliffs). 3 - Dominant landform types (e.g. large cuspate foreland, tombolos and extensive sandy beaches versus headland-bound pocket beaches). 4 - Changes in the orientation (aspect) of the shoreline.

Product Type

dataset

eCat Id

87816

Contact for the resource

Keywords

• GIS DatasetNational

( Theme )

• Geosciences

( Theme )

• boundaries

( Theme )

• environmental

• National

Australian and New Zealand Standard Research Classification (ANZSRC)

• Surface Processes

• Published_Internal

Publication Date

2015-01-01T00:00:00

Creation Date

Security Constraints

Australian Government Security ClassificationSystem    

Classification - unclassified

Legal Constraints

Creative Commons Attribution 4.0 International Licence    

Access - license

Use - license

Status

Purpose

Maintenance Information

asNeeded

Topic Category

geoscientificInformation

Series Information

Lineage

Input data sets included: - The Australian Bathymetry and Topography Grid 2009 (used to define onshore and offshore bathymetric/elevation limits) - Primary and Secondary boundary points defining compartment limits on (or near) the coastline - Break lines connecting the landward to seaward extent via the Primary and Secondary compartment boundary points o Manually digitised on-screen through visual interpretation of the Australian Bathymetry and Topography Grid and SPOT/Landsat optical imagery to define onshore topographic barriers to sediment movement (e.g. ridges. - Australia's Exclusive Economic Zone (EEZ) Process steps, completed within ESRI ArcGIS 10.2 suite, to create the Primary and Secondary compartments included: - Create the bathymetric/elevation contours (+50 m, +25 m, -50 m and -130 m) from the Australian Bathymetry and Topography Grid - Select smaller features via attribute query and visually verify features are not significant before deleting - Convert the contour lines to polygons - Clip the polygons with the EEZ polygon to ensure the compartment envelopes do not exceed Australia's EEZ - Extract (using the 'Erase' tool) the polygon between the inland and offshore limits for each of the Primary (+50 m to -130 m) and the Secondary (+25 m to -50 m) polygons - Create the compartments by applying the `Split Polygons tool within an edit session with inputs of the compartment envelopes and the break lines - Manually attribute compartments with a sequential number starting at the tip of Cape York and travelling in a clockwise direction. - Via a Python script, attribute the Primary and Secondary polygons with a unique identification number composed of State (alpha), parent compartment (numeric) and a sequential number representing the order of occurrence of the primary compartment within the parent compartment e.g. QLD0101, QLD0102. The parent compartments are Coastal Divisions for the Primary compartments and Primary Compartments for the Secondary Compartments

Parent Information

Extents

[-45.0, -9.0, 111.0, 155.0]

Reference System

GDA94 (EPSG:4283)

Spatial Resolution

Service Information

Associations

Downloads and Links

Source Information

Australian Bathymetry and Topography Grid, June 2009 Whiteway, T., 2009. Australian Bathymetry and Topography Grid, June 2009. Scale 1:5000000. Geoscience Australia, Canberra. http://dx.doi.org/10.4225/25/53D99B6581B9A http://www.ga.gov.au/metadata-gateway/metadata/record/67703/ 92.0 172.0 -60.0 -8.0 Australia's Exclusive Economic Zone: CWTH_SSLA_1973_Exclusive_Economic_Zone_As_Proclaimed_AMB2014a http://www.ga.gov.au/gis/services/legislation/CWTH_SSLA_1973_Exclusive_Economic_Zone_As_Proclaimed_AMB2014a/MapServer/WFSServer?request=GetCapabilities&service=WFS 67.0 171.8 -58.5 -8.4