Accession Number PB2013-105768
Title Assessing LiDAR Elevation Data for KDOT Applications.
Publication Date Feb 2013
Media Count 74p
Personal Author C. B. Young
Abstract LiDAR-based elevation surveys are a cost-effective means for mapping topography over large areas. LiDAR surveys use an airplane-mounted or ground-based laser radar unit to scan terrain. Post-processing techniques are applied to remove vegetation and reveal the bare-earth elevations. In recent years, LiDAR hardware and processing technologies have improved greatly. LiDAR surveys are now cost-competitive with traditional aerial topographic surveys and offer the capability to produce very high resolutions (potentially over 50 points per m2 with <10 cm vertical accuracy for airborne systems). LiDAR survey data may not replace traditional ground-based survey for applications that require centimeter or sub-centimeter accuracy, but the data available from these surveys may be perfect for many engineering applications. One such application is hydraulic modeling with HEC-RAS. Hydraulic models, used for flood-plain mapping and the evaluation of bridge backwater effects, require detailed elevation maps for the stream channel and floodplain. These data are difficult to obtain using traditional aerial survey techniques due to riparian vegetation that obstructs the view of the stream channel. Another potential application for LiDAR data is earthwork calculations (cut/fill analysis) for preliminary route planning purposes. Because LiDAR surveys are fairly new, the applications and limitations of these data have not been explored. This report summarizes an extensive literature review of LiDAR applications.
Keywords Aerial photographs
Cost effectiveness
Earth planet
Elevation
Highway engineering
Hydraulics
Kansas Department of Transportation(KDOT)
Light detection and ranging(LiDAR)
Maps
Optical radar
Surveys
Technologies
Terrain
Topography
Vegetation


 
Source Agency Department of Transportation Office of University Research
NTIS Subject Category 48C - Natural Resource Surveys
48I - Cartography
50A - Highway Engineering
43G - Transportation
Corporate Author Kansas Univ., Lawrence. Dept. of Civil, Environmental and Architectural Engineering.
Document Type Technical report
Title Note Final rept.
NTIS Issue Number 1313
Contract Number N/A

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