Extraction of Elm Sparse Woodlands from GF-2 Image based on GEOBIA in Zhenglan Banner, Inner Mongolia

摘要

Elm is an important rare plant resources, but also plays an important role in the landscape construction, windbreak and sand fixation and vegetation restoration in Otindag Sandy Land. Based on remote sensing technology to investigate the spatial distribution pattern of elm woodlands is necessary and of great significance. High spatial resolution satellite imagery represents a potentially effective alternative to field-based surveys, but requires the development of accurate methods to automate information extraction. This paper is based on Geographic Object Based Image Analysis (GEOBIA) to detect and delineate individual tree crowns and crown clusters using two GF-2 images, one in summer and another one in autumn.