LIDARanIntroductionandOverview-PortlandState.PDFVIP

LIDAR LIDAR an Introduction and Overview an Introduction and Overview Rooster Rock State Park Crown Point. Oregon DOGAMI Lidar Project Presented by Keith Marcoe Presented by Keith Marcoe GEOG581, Fall 2007. Portland State University. GEOG581, Fall 2007. Portland State University. What is Lidar? What is Lidar? Light Detection And Ranging Light Detection And Ranging Active form of remote sensing: information is obtained from a signal which is sent Active form of remote sensing: information is obtained from a signal which is sent from a transmitter, reflected by a target, and detected by a receiver back at the from a transmitter, reflected by a target, and detected by a receiver back at the source. source. Airborne and Space Lidar Systems. Most are currently airborne. Airborne and Space Lidar Systems. Most are currently airborne. 3 types of information can be obtained: 3 types of information can be obtained: a) Range to target (Topographic Lidar, or Laser Altimetry) a) Range to target (Topographic Lidar, or Laser Altimetry) b) Chemical properties of target (Differential Absorption Lidar) b) Chemical properties of target (Differential Absorption Lidar) c) Velocity of target (Doppler Lidar) c) Velocity of target (Doppler Lidar) Focus on Laser Altimetry. Most active area today. Focus on Laser Altimetry. Most active area today.