Phinn, Stuart R; Roelfsema, Christiaan M; Mumby, Peter John (2012): Benthic cover map of Heron Reef derived from a high-spatial-resolution multi-spectral satellite image using object based image analysis. PANGAEA, https://doi.org/10.1594/PANGAEA.789968, Supplement to: Phinn, SR et al. (2012): Multi-scale, object-based image analysis for mapping geomorphic and ecological zones on coral reefs. International Journal of Remote Sensing, 33(12), 3768-3797, https://doi.org/10.1080/01431161.2011.633122
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Providing accurate maps of coral reefs where the spatial scale and labels of the mapped features correspond to map units appropriate for examining biological and geomorphic structures and processes is a major challenge for remote sensing. The objective of this work is to assess the accuracy and relevance of the process used to derive geomorphic zone and benthic community zone maps for three western Pacific coral reefs produced from multi-scale, object-based image analysis (OBIA) of high-spatial-resolution multi-spectral images, guided by field survey data. Three Quickbird-2 multi-spectral data sets from reefs in Australia, Palau and Fiji and georeferenced field photographs were used in a multi-scale segmentation and object-based image classification to map geomorphic zones and benthic community zones. A per-pixel approach was also tested for mapping benthic community zones. Validation of the maps and comparison to past approaches indicated the multi-scale OBIA process enabled field data, operator field experience and a conceptual hierarchical model of the coral reef environment to be linked to provide output maps at geomorphic zone and benthic community scales on coral reefs. The OBIA mapping accuracies were comparable with previously published work using other methods; however, the classes mapped were matched to a predetermined set of features on the reef.
Median Latitude: -23.440735 * Median Longitude: 151.911889 * South-bound Latitude: -23.449153 * West-bound Longitude: 151.898827 * North-bound Latitude: -23.432317 * East-bound Longitude: 151.924951
A Quickbird-2 multi-spectral image data of Heron Reef taken on July 1, 2007 was used in a multi-scale segmentation and object-based image classification to produce a benthic community map and a geomorphic zone map. These maps are provided in ArcMap shapefile format. Projection used was Universal Transverse Mercator Zone 56 South and Datum used was WGS 84.
A map is linked as kmz file to view the the actual spatial extent of the benthic community map and geomorphic zone map in a google-earth map at hdl:10013/epic.40097.d008.
16 data points