Sanborn's LiDAR Team Presentation

1. LiDAR- Why Do We need it? Benefits of Having High Resolution LiDAR Data September 16 th , 2009 GIS in The Rockies Presented by: Jamie Young General Manager – LiDAR services

2. LiDAR Li ght D etection A nd R anging Aerial sensor Collects/scans data, either photons (reflected light) or laser pulses Aerial GPS (Global Positioning System) Based on GPS satellite triangulation, measures the location of the aircraft up to 0.1 second. IMU (Inertial Measurement Unit) Measures attitude (pitch/yaw/roll) of aircraft every .002 second. Ground GPS Measures the location of the aircraft up to 0.1 second relative to a known ground position

7. Sanborn Developed Water Body Classification Lake on 7.5 quad map Lake before classification and elevation averaging Lake after classification and elevation averaging ARC surface model

8. Roads 1.4 meter Density Profile at 1.4 meter

9. Road 0.7 Meter Profile at 0.7 meter

10. Road 0.3 Meter Profile at 0.3 meter

12. Accuracy Issues Calibration – Process to help verify the Project Data Relative Accuracy of the data is critical – should be able to achieve under 10cm RMSEz and most cases under 5 cm RMSEz Verification of LiDAR Data is critical Manufacture need to listen to LiDAR vendors concerns: Hardware Error Intensity issues

13. Checking Calibration DZ ortho - GeoCue

23. LiDAR BLOG Submit your LiDAR questions... http://lidarblog.wordpress.com

24. Thank You! and Questions Graphics provided by Leica