Cocos (Keeling) Islands GIS
© Orthophotography
Metadata
Dataset
Title Orthophotography
Custodian Geoscience Australia
Jurisdiction Australia
Description
Abstract Colour orthophotography of the Cocos (Keeling) Islands, derived from aerial photography taken over the islands on 5th April 1987 (islands only, not including the lagoon). The orthophotography has a 25cm on-the-ground pixel size. The quality of the orthophotography is impressive, with acceptable resolution down to 1:400 scale.
Search Word(s) PHOTOGRAPHY AND IMAGERY Aerial
PHOTOGRAPHY AND IMAGERY Orthophotography
Geographic Extent Name(s) Cocos (Keeling) Islands Edition 1 2010 1:25000 - Geoscience Australia GEOCAT 70146
Data Currency
Beginning Date 05APR1987
Ending Date 05APR1987
Dataset Status
Progress Complete
Maintenance and Update Frequency as required
Access
Stored Data Format DIGITAL - ERMapper ERS & TIFF/TFW
Available Format Type DIGITAL - ERMapper ERS & TIFF/TFW
Access Constraint See contact details below.
Data Quality
Lineage Aerial photography was flown by Australian Survey Office Canberra in 1987, scanning was done by Kevron Aerial Surveys and orthorectification by LandInfo (Canberra) in 2000.

In December 2003 GA projected the data to UTM (WGS84) zone 47S.

In February 2005 GA reporjected the imagery as a whole and re-cut the tiff imagery to improve visualisation of data.

Positional Accuracy GA expects the Cocos orthophotography over the main atoll to be within a meter of its true position.
Exceptions to this high level of accuracy are Horsborough Island and North Keeling Island, which are on unconnected flight lines and did not have reliable ground control available. Initial indications are that the North Keeling orthophotography could be around 35 meters out, and the Horsborough Island orthophotography could be up to 20 meters out.
Attribute Accuracy not applicable
Logical Consistency not applicable
Completeness Appears complete for all areas. Georeferencing of Horsburgh and North Keeling Islands has not proven to be very accurate.
Contact Information
Contact Organisation Attorney-General's Department
Contact Position Territories
Mail Address GPO Box 594, Canberra, A.C.T 2601
Locality 111 Alinga St, Canberra
State A.C.T
Country Australia
Postcode 2601
Telephone (02) 6249 9479
Facsimile (02) 6274 8040
Electronic Mail Address Keith.Porrit@ga.gov.au
Metadata Date 13-1-2004
Additional Metadata
Projection UTM (WGS84) zone 47S