LiDAR Cross Section

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LiDAR Cross Section
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The LAS format (v1.1)
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LiDAR Point Cloud Data
X Y Z i
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Digital Surface Model (DSM)
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Digital Elevation Model (DEM)
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DEM Interpolation
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Void Areas in Grey
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Sample Results
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Intensity Values
Intensity Source Data
Intensity Raster
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• Now that we are oriented to the data
• What about the APPLICATIONS!!!

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Applications for The National Map
Lidar
Hydrology
Elevation Structures
Contours Land Cover
Orthoimagery
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Vegetation in LiDAR
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Habitat and Ecological Applications

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FEMA Mapping How Bad Is It?
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• Bare earth LiDAR
• X-Section extracted from DEM
• Section formatted for HEC-RAS input
• Section spacing based on geomorphology

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• Water surface elevations mapped to DEM
• Flood extents validated against DEM

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Towers Hubs Identified

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Analysis of the Links
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Identification of Shadows
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Urban Example
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Karst Example
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Subsurface Saturated Flow Using LiDAR Terrain
Data
TIi ln( a / tan(b)KsD)
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Variable Saturation Potential Using LiDAR
Terrain Data
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Variable Saturation Potential Using LiDAR
Terrain Data
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Variable Saturation Potential Using LiDAR
Terrain Data
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TIi ln( a / tan(b)KsD)
LiDAR Data informs Best Management Practices to
improve water quality
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Export Coefficient Modeling
N LN S
(EiNTIiNBIi)Ai i1

• BIi ln(S TDAi/tanBDAi)
• NBI fBI/BIi

TIi ln (ai/tanbi) NTI TIi/fTI
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3-D Visualizations
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