Oceanica’s Perth Coastal Waters Imagery 2004

Brief description

High resolution (0.5m) rectified aerial photography of Perth Metropolitan coastal waters between Two Rocks and Singleton, extending 6 km offshore and including all of Owen Anchorage and Cockburn Sound. Photography was undertaken during favourable atmospheric and oceanographic conditions, allowing excellent light penetration through the water column, yielding high quality imagery of benthic habitats in the region. This was undertaken 12th March 2004.

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Statement: The imagery was captured on 12 March 2004 by FUGRO, when the atmospheric and oceanographic conditions in the area enable maximum light penetration through the water column. The imagery was captured as colour vertical aerial photography using an aircraft-mounted Leica RC30 (number 13149) camera with a super wide angle lens with a focal length of 152.68 mm. The photography was captured from a flying height of approximately 3,825 m, resulting in a nominal scale of capture of 1:25,000 (on film FSC034). The location of the camera during each exposure was determined using a real-time differential GPS and this information was used to assist the aerotriangulation and the production of the orthophotograph. The original negatives of the aerial photography were scanned on a DSW600 Leica photogrammetric scanner in 24 bit colour at a resolution of 15 micron. The resultant pixel resolution is 0.375 m x 0.375 m. The digital imagery was aerotriangulated using control points from existing orthophotography and ground control points. The aerotriangulation and orthophotograph generation was undertaken using the Leica ORIIMA/CAP-A bundle adjustment triangulation software and the Leica SOCET photogrammetric software suite. 0.5m ground resolution with 0.7 mm pos accuracy at a scale of 1:25,000.