Lightning Talk: Working with LiDAR Data

April – June 2013

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LiDAR data manipulation

Derive Ground to Tree Heights Approx. 9Gbytes LiDAR LAS data in original dataset Combine Point Cloud LAS files Clip Point Cloud & Roads to AOI (Area of Interest) Filter Point Cloud by elevation – thin bad returns Tile the point cloud into “cells” (i.e. 10x10m areas) Split by Classification (Ground & High Vegetation) Convert Point Cloud Cells -> multi-point Extract Min/Max XYZ and calculate maxZ-minZ = diffZ Output to:

Coloured polygons (MapInfo)

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Source: LAS LiDARGeoBase - National Road Network

Result: MapInfo TAB

LiDAR Data Manipulation

Example

Spurious returns

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LiDAR data manipulation

Thank You!

Questions?