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LiDAR Introduction. LiDAR = Light Detection and Ranging Airborne laser scanning – rapid high-density survey of Earths surface Accurate and reliable surveys,

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Presentation on theme: "LiDAR Introduction. LiDAR = Light Detection and Ranging Airborne laser scanning – rapid high-density survey of Earths surface Accurate and reliable surveys,"— Presentation transcript:

1 LiDAR Introduction

2 LiDAR = Light Detection and Ranging Airborne laser scanning – rapid high-density survey of Earths surface Accurate and reliable surveys, faster and with higher density than conventional surveys

3 How does LiDAR work? Simultaneously Measure trajectory of aircraft in three dimensions Measure orientation of laser scanner about three rotations axes Transmit and receive laser pulses, measure the time-of-flight (i.e. range to reflecting surface) Consequently Know the coordinates of 150,000 points surveyed per second Map the surface of the Earth in high density

4 CK Aerial Surveys – Infrastructure AS350 Squirrel Leica LiDAR & Camera

5 CK Aerial Surveys – Specifications Point density – 15 to 60 points per m 2 Vertical accuracy – 7 to 10 cm Horizontal accuracy – 5 to 7 cm in both the along- and across-track components Imagery scale – 1:10,000 Pixel ground separation distance – 5 to 7 cm Result formats – CAD designs, GIS shape files, GeoTIFF images

6 CK Aerial Surveys – Products Laser point cloud

7 CK Aerial Surveys – Products Contours

8 CK Aerial Surveys – Products High-resolution aerial photography

9 CK Aerial Surveys – Products Power line mapping

10 CK Aerial Surveys – Products Flood plain mapping

11 CK Aerial Surveys – Products Volumetric calculations for mining applications Repeat surface survey – compare surfaces – accurately calculate volume of removed ore

12 Survey Comparison TechniqueTraditionalCK Aerial SurveysFixed Wing Horizontal accuracy2 cm5 – 7 cm10+ cm Vertical accuracy3 cm7 – 10 cm10+ cm Point density1 every 10 – 20 m 2 15 – 60 per m 2 1 – 5 per m 2 ConditionsWeather permitting Clear Imagery scaleN/A1:10,000 Pixel sizeN/A5 – 7 cm GSD Site accessRequiredNot required Rapid deploymentYes No

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14 Executive Summary Aerial laser scanning is rapidly becoming the preferred surveying technique. Its high-resolution and rapid results, which are accurate enough for the most construction and mining applications, make aerial laser scanning (or LiDAR) the surveying technology of choice for a changing environment. Combined with geo-referenced high-resolution imagery, the spatial dataset becomes even more intuitive to decision makers and engineers alike.


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