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LiDAR Introduction

LiDAR Introduction. LiDAR = Light Detection and Ranging. Airborne laser scanning – rapid high-density survey of Earth’s surface Accurate and reliable surveys, faster and with higher density than conventional surveys. How does LiDAR work?. Simultaneously

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LiDAR Introduction

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  1. LiDAR Introduction

  2. LiDAR = Light Detection and Ranging Airborne laser scanning – rapid high-density survey of Earth’s 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 m2 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

  13. www.ckas.co.za info@ckas.co.za +27 11 949 8904

  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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