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Lidar
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
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