Research on Some Key Technologies of Features Extraction from LIDAR Data in Coastal Zone

Coastline, tidal flat is a significant and sensitive regional type for perfecting China's geographical information database, rapid and accurate survey toward it and postprocessing Lidar data effectively are the main survey work. This paper omnibearingly proposed separation methods of main planimetric feature in coastline and tidal flat area, from Lidar points. Vegetation, soil and water-body would be extracted through integrating spectral information, laser reflection rate, return intensity, especially, the characteristic of double return signals introduced for the extraction of water-body points. It can bring reference significance for research of coastline, tidal flat zone and promote the development of airborne Lidar in China.