Abstract
Abstract. Remote sensing facilitates the extraction of information for earth’s surface through its capability of acquiring images covering large areas and the availability of commercial software for their processing. The aim of this study is the feature extraction from three Geoeye-1 stereo pairs for forested area. The study area is located in central mountainous forested peninsula of Chalkidiki, in northern Greece. Dominant forest tree species of the site are oak (Quercus conferta), beech (Fagus moesiaca), black pine (Pinus nigra) and calabrian pine (Pinus brutia). Very High Resolution (VHR) Geoeye-1 stereo pair satellite images were utilized in panchromatic and multispectral mode. The panchromatic mode was employed for Digital Surface Model (DSM) generation and its evaluation. In this study the High Pass Filter (HPF) data fusion technique was applied between panchromatic and multispectral mode for acquiring a new image with the benefits of both contracting images. Because of the fact that the feature extraction was attempted in a forested region, NDVI index and Tasseled Cap transformation were applied in the fused images’ evaluation procedure. Optical assessment was also applied. The accuracy of the generated DSM and the evaluation results of the fused images were remarkable.
Highlights
Forest management is important to environmental protection, biodiversity preservation, recreation, timber production and mitigation of climate change (Peterson et al, 1999)
The DSMz error was 1.5m (RMSE) and 0.9m, which is quite satisfactory for a mountainous forested terrain
Other studies have showed better accuracy (Saldaña et al, 2012; Aguilar et al, 2013), but they were conducted in a study area with smooth coastal terrain
Summary
Forest management is important to environmental protection, biodiversity preservation, recreation, timber production and mitigation of climate change (Peterson et al, 1999). Remote sensing facilitates the extraction of information for earth’s surface through its capability of acquiring images over large areas. This is even more useful in the case of consistent and repetitive monitoring of forests (Hussin and Bijker, 2000). Feature extraction from satellite images strengthens the ability of monitoring the Earth’s surface and forested areas. In this study Geoeye-1 stereo pairs were utilized to extract information on a forested area of Chalkidiki peninsula. Geoeye satellite was launched on September 2008 from Vandenburg Air Force Base in California.
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