Authors / CoAuthors
Abstract
Major Australian Shipping Lanes is derived by Geoscience Australia from four years worth of AMSA ship reporting locations, the AUSREP products AUSREP 2000 to 2003. The process used in this dataset to get a logical outcome was in some parts a best guess. These lanes are NOT ACCURATE nor should they be used by marine craft or like as definitive or indicative Shipping Lanes / Routes or similar.
Product Type
dataset
eCat Id
66122
Contact for the resource
Custodian
Point of contact
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
Keywords
-
- Marine Data
- ( Theme )
-
- marine
- Australian and New Zealand Standard Research Classification (ANZSRC)
-
- Marine Geoscience
-
- Published_Internal
Publication Date
2008-06-12T00:00:00
Creation Date
Security Constraints
Legal Constraints
Status
Purpose
Maintenance Information
notPlanned
Topic Category
geoscientificInformation
Series Information
Lineage
Major Australian Shipping Lanes derived from the AUSREP 2000 and 2003. AUSREP : is a ship reporting system designed to contribute to the safety of life at sea and is operated by the Australian Maritime Safety Authority (AMSA) through the Australian Rescue Coordination Centre (RCC AUSTRALIA) in Canberra. Participation in AUSREP is mandatory for certain ships but most other commercial ships participate voluntarily. Shipmasters send a position report each day at a convenient time nominated by the ship, the maximum time between any two reports is not to exceed 24 hours. Dates and times contained in AUSREP reports are in Universal Coordinate Time (UTC). The AUSREP spatial (point) layer represents the position report of a large vessel. Attribute data for the vessel is held against each point. The data is used as reference material only, designed to indicate shipping lanes and the number of vessels moving through Australian waters. The data is collected by calendar year. Data supplied to interested parties outside AMSA will exclude, ship identification, including vessel name and call-sign. DERIVED SHIPPING LANES : 1. The AUSREP datasets were obtained from Lyn Murray (lyn.murray@amsa.gov.au) at AMSA for 2000, 2001, 2002, 2003. 2. Using ArcGIS 8.3 these four datasets were then merged into one dataset by Kane Orr (orr.kane@ga.gov.au) from Geoscience Australia. 3. The daily shipping way-points explained above, were connected into polylines using the vessels ID number. This gave a course dataset showing each ships route. [Points2Lines ArcGIS script] 4. Using Spatial Analyst - a Density grid was made from the shipping routes. Each cell was calculated at 0.1 of the square unit of the map. 5. This Density Grid was then reclassified; Minor Density 0 - 400 occurrences and Major Density 400 occurrences and above. 6. Using Spatial Analyst the reclassified grid was then converted into a polygon layer using the Rasters to Features function. 7. This grid was clipped against the Australian 1:250k coastline. 8. The polygons indicating the minor occurrences were then deleted. This left a polygon layer that GA believes represents Australia's "Major" Shipping Lanes (Areas). 9. Polylines representing the centre of each major polygon feature were digitised using the 'Heads Up' method. NOTED ERRORS: 1. The line connecting the waypoints are straight lines only, this creates biases towards the coastline where ships turn around landmasses. 2. Polylines may intersect land. Disclaimer: There are limitations on this dataset and also the yearly AUSREP datasets. The process used in this dataset to get a logical outcome was in some parts a best guess. These lanes are NOT ACCURATE nor should they be used by marine craft or like as definitive or indicative Shipping Lanes / Routes or similar.
Parent Information
Extents
[-43.0, -3.5, 84.5, 163.0]
Reference System
Spatial Resolution
Service Information
Associations
Downloads and Links
Source Information
Source data not available.