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001-es BibID:	BIBFORM070788
035-os BibID:	(WoS)000416534800005 (Scopus)85020520291
Első szerző:	Szabó Zsuzsanna (környezetgazdálkodási és vidékfejlesztési agrármérnök)
Cím:	Airborne LiDAR point cloud in mapping of fluvial forms : a case study of a Hungarian floodplain / Szabó Zsuzsanna, Tóth Csaba Albert, Tomor Tamás, Szabó Szilárd
Dátum:	2017
ISSN:	1548-1603 1943-7226
Megjegyzések:	The aim of this paper was to analyse the ground and low vegetation points of a LiDAR point cloud from the aspect of the generated digital terrain model (DTM). We determined the height difference between the surveyed surface and the DTM and the level of interspersion of ground and low vegetation points in a floodplain. Finally, we performed a supervised classification with topographic (elevation, slope, aspect) variables and an NDVI layer to identify swales and point bars as floodplain forms. Cross sections of field surveys provided reference data to express the magnitude of the bias on the DTM caused by the vegetation, and we proved that the bias can reach the 60% of the relative height and depth of the floodplain forms (mean error was 0.15?0.12 m). A contagion type landscape metric, the Aggregation Index, provided an appropriate tool to analyse and quantify the interspersion of the ground and vegetation points: indicating a high level of interspersion of the classified points, i.e. proved that vegetation points where the last echoes reflected from the vegetation became ground points. Floodplain classification performed best with the common use of DTM, slope, aspect and NDVI coverages, with 71% overall accuracy.
Tárgyszavak:	Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban geomorphology fluvial landform point cloud; landscape indices landscape indices Aggregation Index
Megjelenés:	GIScience & Remote Sensing. - 54 : 6 (2017), p. 862-880. -
További szerzők:	Tóth Csaba Albert (1971-) (geográfus) Tomor Tamás (1976-) (geográfus) Szabó Szilárd (1974-) (geográfus)
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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