Cocos (Keeling) Islands GIS
Cocos Island 2011 Orthophotography
Title Cocos Island 2011 Orthophotography
Custodian Geoscience Australia
Jurisdiction Australia
Abstract Between the 8th and 16th of August 2011 aerial photography of Cocos (Keeling) Islands was obtained by AAM using light aircraft. The imagery has a 15cm on ground pixel size resolution.
This metadata sheet refers to the orthophotography mosaic of the Cocos southern atoll (Cocos_2011_orth.ecw) and of North Keeling (N_Keeling_2011_orth.ecw). AAM also provided the imagery to Geoscience Australia as 1km ecw and tiff tiles, along with the raw non-georeferenced images. Only the full mosaic is provided in the Cocos GIS package. Other data can be requested from Geoscience Australia.
Geographic Extent Name(s) Cocos (Keeling) Islands Edition 1 2010 1:25000 - Geoscience Australia GEOCAT 70146
Data Currency
Beginning Date 8 August 2011
Ending Date 16 August 2011
Dataset Status
Progress Complete
Maintenance and Update Frequency Not planned
Stored Data Format DIGITAL - TIFF/ECW
Available Format Type DIGITAL - TIFF/ECW
Access Constraint None
Data Quality
Lineage In 2011 AAM was commissioned by the Commonwealth to obtain orthophotography of Cocos (Keeling) Islands. The survey was carried out using a fixed wing aircraft between the 8th and 16th of August 2011. All imagery was captured using a DiMAC UltraLight 50mmm Lens camera within approximately 2 hours of low tide. During this period tides ranged from 0.4m to 1.3m. The photo frame and tide height table lists the approximate tide height for each raw photo. Using an automated process, raw images were joined to form two mosaics, one of the Cocos southern atoll and one of North Keeling island. Colour balancing and replacement of certain areas with alternate raw images was performed for consistency.

The imagery has a 15cm on ground resolution. For a detailed description of the aerial survey data please see the AAM Survey Report.

The orthophotography was provided to Geoscience Australia in GDA94. It has been converted to UTM WGS 84 zone 47s using ESRI ArcMap.

Positional Accuracy As a guide, the orthophotography is horizontally accurate to 30cm.
Attribute Accuracy Not Relevant
Logical Consistency Not Relevant
Completeness Complete.
Contact Information
Contact Organisation Geoscience Australia
Contact Position Keith Porritt
Mail Address Cnr Jerrabomberra Ave and Hindmarsh Drive
State A.C.T
Country Australia
Postcode 2601
Telephone (02) 6249 9479
Facsimile (02) 6249 9971
Electronic Mail Address
Metadata Date 8-3-2012
Additional Metadata
Projection UTM (GDA94) zone 47s