Vegetation identification with Lidar
Helt, Michael F.
MetadataShow full item record
LIDAR data taken over the Elkhorn Slough in Central California are analyzed for terrain. The specific terrain element of interest is vegetation, and in particular, tree type. Data taken on April 12th, 2005, were taken over a 10 km x 20 km region which is mixed use agriculture and wetlands. Time return and intensity were obtained at ~2.5 m postings. Multi-spectral imagery from QuickBird was used from a 2002 imaging pass to guide analysis. Ground truth was combined with the orthorectified satellite imagery to determine regions of interest for areas with Eucalyptus, Scrub Oak, Live Oak, and Monterey Cyprus trees. LIDAR temporal returns could be used to distinguish regions with trees from cultivated and bare soil areas. Some tree types could be distinguished on the basis of the relationship between first/last extracted feature returns. The otherwise similar Eucalyptus and Monterey Cyprus could be distinguished by means of the intensity information from the imaging LIDAR. The combined intensity and temporal data allowed accurate distinction between the tree types, and task not otherwise practical with the satellite spectral imagery.
Showing items related by title, author, creator and subject.
Sensitivity of tropical-cyclone models to the surface drag coefficient in different boundary-later schemes Smith, Roger K.; Montgomery, Michael T.; Thomsen, Gerald L. (Royal Meteorological Society, 2014-04);The recent study of the sensitivity of tropical-cyclone intensification to the surface drag coefficient in a three-dimensional model by Montgomery et al. is extended to include a wind-speed-dependent drag coefficient and ...
Study of transition phenomena in a straight channel with 40 to 1 aspect ration with and without imposed pulsations Part two: Reynolds number surveys Smith, Bradley Joseph (Monterey, California. Naval Postgraduate School, 1991-03);A channel with rectangular cross-section, 40 to 1 aspect ratio (height is0.0127 m) and 4.27 m test section length (336 channel lengths) is used to study the effects of imposed pulsations on laminar, transitional, and ...
Flores, Christopher R. (Monterey, California: Naval Postgraduate School, 2015-12);The purpose of this thesis is to provide a system level performance analysis for an imaging spacecraft. In an imaging spacecraft, an attitude control subsystem’s function is to orient the spacecraft’s body to acquire a ...