Use of SPOT 5 for mapping seagrasses : An application to Posidonia oceanica

Agreil, Magali/ Sourbes, Laurent/ Pergent-Martini, Christine/ Pergent, Gérard/ Tsirika, Anastasia/ Pasqualini, Vanina/ Skoufas, George/ Σκούφας, Γεώργιος/ Τσιρίκα, Αναστασία

Institution and School/Department of submitter: ΤΕΙ Θεσσαλονίκης
Keywords: Sand;SPOT 5;Oceanography;World;Mediterranean Sea;Accuracy;Satellites
Issue Date: 2005
Publisher: Elsevier
Citation: Pasqualini, V., Skoufas, G., Pergent-Martini, C. & Agreil, M. (2005). Use of SPOT 5 for mapping seagrasses: An application to Posidonia oceanica. Remote Sensing of Environment. 94:39-45.
Remote Sensing of Environment, vol. 94, no. 1, 2005
Abstract: The SPOT 5 satellite was launched in May 2002; it provides multispectral imagery with a spatial resolution of 10 m and fused imagery with a spatial resolution of 2.5 m. These types of satellite imagery were used for mapping beds of Posidonia oceanica in the Mediterranean Sea, where it is a dominant species forming monospecific beds in a structurally simple environment (four classes: sand, photophilous algae on rock, patchy seagrass beds and continuous seagrass beds). Supervised classifications by depth range were made of both types of image. A direct comparison of overall accuracy between SPOT 2.5 m and SPOT 10 m revealed that this tool provided accurate mapping in both cases (between 73 and 96% accuracy). Although SPOT 2.5 m provides lower overall accuracy than SPOT 10 m, it is a very useful tool for the mapping of P. oceanica, as it allows the patchiness of the formations to be better taken into account. The opportunity to use a reliability scale, which takes into account the effects of extrinsic factors on the processing of the images, confirmed the usefulness of the option of using a reduced pixel size in order to obtain an improved match between the results from mapping and field observations.
Description: Δημοσιεύσεις μελών--Παράρτημα--Τμήμα Τεχνολογίας Αλιείας και Υδατοκαλλιεργειών, 2005
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Appears in Collections:Δημοσιεύσεις σε Περιοδικά

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