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Determination of wetland vegetation height with LIDAR

Light Detection and Ranging (LIDAR) is a new technology that offers a potential alternative to field surveying and photogrammetric techniques for the collection of elevation data. It has the advantages of being rapid accurate and able to map areas that are difficult to access. | Turk J Agric For 28 (2004) 63-71 © TÜB‹TAK Determination of Wetland Vegetation Height with LIDAR Levent GENÇ*,**,***, Bon DEWITT*, Scot SMITH* * Geomatics/Surveying and Mapping Program, University of Florida, 345 Weil Hall P.O. Box 116580, Gainesville, FL, USA. 32611-6580 leventgc@ufl.edu, bdewi@ce.ufl.edu, ses@ce.ufl.edu ** Agricultural Structures and Irrigation Department, College of Agriculture, Kahramanmarafl Sütçü ‹mam University, 46060 Kahramanmarafl - TURKEY leventgc@ksu.edu.tr Received: 02.04.2003 Abstract: Light Detection and Ranging (LIDAR) is a new technology that offers a potential alternative to field surveying and photogrammetric techniques for the collection of elevation data. It has the advantages of being rapid accurate and able to map areas that are difficult to access. LIDAR has demonstrated the capability to accurately estimate important vegetation structural characteristics such as forest canopy height. For these reasons, airborne LIDAR data were used to compare vegetation height determinations with field observations on one selected transect in the vicinity of Lake Hatchineha in Florida, USA. The approach was based on the LIDAR and field measurements. The results showed that the lowest height (0 cm) appeared to be open water and barren fields. Vegetation heights of 0-30 cm corresponded to short grassy areas and 90-180 cm corresponded to medium height plants. Tall plants were determined to be vegetation heights ranging from 180 to 365 cm and very tall plants were determined to range from 365 to 600 cm. In addition, vegetation heights ranging from 600 to 1200 cm and from 1200 to 1700 cm corresponded to low and medium-height trees, respectively. Sources of potential error in determining forest tree canopy height were found to evolve from the fact that medium-height tree branches were sometimes reflected and recorded as a first hit and so were incorrectly classified as either low tree or tall plant classes. The results showed that, in most .