Using LiDAR Data At Vermont Electric Power Co. Prepared By: Jarrod Harper Phone: (802) 770? 6223 Email: jharper@velco. com What is LiDAR? Light Detection and Ranging • The dictionary title: a measuring system that detects and locates objects on the same principle as radar but uses light from a laser • A method for quickly and accurately collecting ground information from an aerial platform using a laser and ground control. • In the technical definition of the word, LiDAR is a survey but it cannot be used for a legal boundary survey. How is LiDAR Data Collected?
What Data is Collected During a Flight? “Everything ” • Foliage • Bare Earth • Transmission Lines and Towers • Railway Beds • Roadways • Vehicles • Buildings • etc. Optional • Photography • Weather Conditions What Were the Deliverables to VELCO? • DTM – Digital Terrain Model • Orthorectified Imagery • AutoCAD Drawings •Contours •Streams •Roads •Buildings •Utility Lines and Poles •Edge of Trees • PLS? CADD Terrain Model PLS? CADD (Power Line Systems ? Computer Aided Design and Drafting): overhead power line design software What Has VELCO Created With the Data? New Transmission Line Designs • Permitting Drawings • EPSC (Erosion Prevention and Soil Containment) Plans • Aesthetic Mitigation Plans • Tree Planting • etc. Issues Encountered With the Data? • Mobilization • Ground Control • Foliage • Units Conversion LiDAR Data Collected in October 2006 Cost for LiDAR? • Aerial Laser Ground Profile – DTM: $743. 75 /mile • Digital Imagery and Orthophotography – $743. 75 /mile • AutoCAD Mapping – $637. 50 /mile • PLS? CADD Format Files – $185. 00 /mile • Cost Per Mile: $2,310. 00 • Miles Surveyed: 52. 5 • Total Project Cost: $121,275. 00
