FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W311948955> ?p ?o ?g. }

• W311948955 abstract "There is an increasing demand for urban vegetation mapping, and airborne laser scanning (ALS) has the unique ability to provide geo-referenced three-dimensional data useful for mapping of surface features. This thesis examines the ability of full-waveform and discrete return ALS point data to distinguish urban surface features, and represent the three-dimensional attributes of vegetation at different scales in a vector-based GIS environment. Two full-waveform datasets, at a wavelength of 1550 nm, and a discrete return dataset, at 1064 nm, are used. Points extracted from the first full-waveform dataset are classified with k-means clustering and decision tree into vegetation, buildings and roads, based on the attributes of individual points and the relationships between neighbouring points. A decision tree is shown to perform significantly better (74.62%) than k-means clustering (51.59%) based on the overall accuracies. Grass and paved areas could be distinguished better using intensity from discrete return data than amplitude from full-waveform data, both values proportional to the strength of the return signal. The differences in the signatures of surfaces could be related to the wavelengths of the lasers, and need to be explored further. Calibration of intensity is currently possible only with full-waveform data. When the decision tree is applied on the second full-waveform dataset, the backscatter coefficient proves to be a more useful attribute than amplitude, pointing to the need for calibration if a classification method using intensity is to be applied on datasets with different scanning geometries. A vector-based approach for delineating tree crowns is developed and implemented at three scales. The first scale provides a good estimation of the tree crown area and structure, suitable for estimating biomass and canopy gaps. The third scale identifies the number of trees and their locations and can be used for modelling individual trees." @default.
• W311948955 created "2016-06-24" @default.
• W311948955 creator A5000017220 @default.
• W311948955 date "2010-01-15" @default.
• W311948955 modified "2023-09-28" @default.
• W311948955 title "Classification of Full-waveform Airborne Laser Scanning Data and Extraction of Attributes of Vegetation for Topographic Mapping" @default.
• W311948955 cites W113910572 @default.
• W311948955 cites W143514521 @default.
• W311948955 cites W1482289351 @default.
• W311948955 cites W1498729378 @default.
• W311948955 cites W1501322963 @default.
• W311948955 cites W150263746 @default.
• W311948955 cites W1529193148 @default.
• W311948955 cites W1532691246 @default.
• W311948955 cites W1571356903 @default.
• W311948955 cites W1594031697 @default.
• W311948955 cites W159618849 @default.
• W311948955 cites W1655573866 @default.
• W311948955 cites W1673075472 @default.
• W311948955 cites W1873332500 @default.
• W311948955 cites W1906757087 @default.
• W311948955 cites W190725495 @default.
• W311948955 cites W1950321243 @default.
• W311948955 cites W1967020891 @default.
• W311948955 cites W1977234235 @default.
• W311948955 cites W1977428739 @default.
• W311948955 cites W1980316124 @default.
• W311948955 cites W1982994396 @default.
• W311948955 cites W1986437042 @default.
• W311948955 cites W1990077509 @default.
• W311948955 cites W1993307196 @default.
• W311948955 cites W1993417238 @default.
• W311948955 cites W1994881920 @default.
• W311948955 cites W1995870343 @default.
• W311948955 cites W1998222021 @default.
• W311948955 cites W2000794655 @default.
• W311948955 cites W2005073772 @default.
• W311948955 cites W2006305514 @default.
• W311948955 cites W2008477163 @default.
• W311948955 cites W2009289118 @default.
• W311948955 cites W2009451364 @default.
• W311948955 cites W2010221273 @default.
• W311948955 cites W2016077123 @default.
• W311948955 cites W2016364225 @default.
• W311948955 cites W2016428929 @default.
• W311948955 cites W2023967474 @default.
• W311948955 cites W2026596024 @default.
• W311948955 cites W202731923 @default.
• W311948955 cites W2030337367 @default.
• W311948955 cites W2030359906 @default.
• W311948955 cites W2031753400 @default.
• W311948955 cites W2033773650 @default.
• W311948955 cites W2034385314 @default.
• W311948955 cites W2035510690 @default.
• W311948955 cites W2038224994 @default.
• W311948955 cites W2042891401 @default.
• W311948955 cites W2043871384 @default.
• W311948955 cites W2046736943 @default.
• W311948955 cites W2050401936 @default.
• W311948955 cites W2065407071 @default.
• W311948955 cites W2065438578 @default.
• W311948955 cites W2066017924 @default.
• W311948955 cites W206794200 @default.
• W311948955 cites W2078073057 @default.
• W311948955 cites W2081889060 @default.
• W311948955 cites W2084273978 @default.
• W311948955 cites W2086103748 @default.
• W311948955 cites W2086461898 @default.
• W311948955 cites W2094605604 @default.
• W311948955 cites W2095460942 @default.
• W311948955 cites W2098593096 @default.
• W311948955 cites W2098919237 @default.
• W311948955 cites W2106488983 @default.
• W311948955 cites W2107745142 @default.
• W311948955 cites W2111841011 @default.
• W311948955 cites W2119301275 @default.
• W311948955 cites W2125899407 @default.
• W311948955 cites W2127792030 @default.
• W311948955 cites W2130899072 @default.
• W311948955 cites W2133029430 @default.
• W311948955 cites W2136280819 @default.
• W311948955 cites W2138060511 @default.
• W311948955 cites W2140190241 @default.
• W311948955 cites W2147910516 @default.
• W311948955 cites W2148645123 @default.
• W311948955 cites W2150279355 @default.
• W311948955 cites W2151773573 @default.
• W311948955 cites W2153384129 @default.
• W311948955 cites W2153504150 @default.
• W311948955 cites W2155698916 @default.
• W311948955 cites W2164777277 @default.
• W311948955 cites W2166479727 @default.
• W311948955 cites W2169059815 @default.
• W311948955 cites W2169951244 @default.
• W311948955 cites W2273297058 @default.
• W311948955 cites W2274394933 @default.
• W311948955 cites W2288481335 @default.
• W311948955 cites W2303394219 @default.
• W311948955 cites W2312997001 @default.
• W311948955 cites W2319794630 @default.

• next