Cocos (Keeling) Islands GIS
Flight Lines, Photo Centres & Extent Rectangles
Title 2011 Aerial Flight Lines, Photo Centres and Extent Rectangles
Custodian Geoscience Australia
Jurisdiction Australia
Abstract This metadata sheet refers to the following three shapefiles:
  • flight_lines_co11.shp
  • photo_centres_co11.shp
  • photo_rectangles_co11.shp

  • They can all be found in the following directory: \\cocos\data\orthphto\orth2011

    Together these datasets show the flight lines flown by AAM during the 2011 aerial survey of Cocos (Keeling) Islands, the centre of each aerial photograph taken during flight and approximate photograph extent rectangles.
    Geographic Extent Name(s) Cocos (Keeling) Islands Edition 1 2010 1:25000 - Geoscience Australia GEOCAT 70146
    Data Currency
    Beginning Date August 2011
    Ending Date August 2011
    Dataset Status
    Progress Complete
    Maintenance and Update Frequency Extent rectangles may be improved in the future with the provision of georeferenced aerial photographs from AAM.
    Stored Data Format DIGITAL - ESRI Shapefile
    Available Format Type DIGITAL - ESRI Shapefile
    Access Constraint See contact details below.
    Data Quality
    Lineage The raw aerial photographs and photo point locations were provided to GA by AAM in September 2011. The photo points were joined to create flight lines using ArcMap extension XTools, based on the flight number and photo order. The angle of each flight line was calculated in ArcMap and spatial attached to the original photo points of the line. The length and height of the raw individual aerial photographs were estimated manually using previous imagery. These dimensions were also attached to the point attributes. The dimensions and angles were then used to generate the photo extents rectangles in GeoWizard.
    Positional Accuracy Flight rectangles are only intended to be approximate. In some cases the photo was not taken looking down from the central point and therefore is located to the side of the extent rectangle. The size is approximate and will match the size of some photographs better than others.
    Attribute Accuracy Not Documented
    Logical Consistency Consistent
    Completeness GA recognises that there is still more work that can be done to yield an error free data set.
    Contact Information
    Contact Organisation Geoscience Australia
    Contact Position Keith Porritt
    Mail Address Cnr Jerrabomberra Ave and Hindmarsh Drive
    Locality SYMONSTON
    State A.C.T
    Country Australia
    Postcode 2601
    Telephone (02) 6249 9479
    Facsimile (02) 6249 9971
    Electronic Mail Address
    Metadata Date 29-11-2011
    Additional Metadata
    Projection UTM (GDA94) zone 47s