LIDAR Light Detection And Ranging San Diego State

LIDAR – Light Detection And Ranging San Diego State University

• 1 st, 2 nd, 3 rd, and 4 th returns have different X, Y (&Z) • Results in additional LIDAR points

LIDAR – Light Detection And Ranging • Multiple returns - Provide additional LIDAR points (X, Y, Z) - Indicate vegetation canopy (or edge of tall feature) - Reveal structural detail within the canopy San Diego State University

LIDAR – LIght Detection And Ranging 1 st 2 nd 6. 5 ft 3 rd 4 th 1 st, 2 nd, 3 rd, and 4 th Returns Have Different X, Y (&Z) San Diego State University

LIDAR – Light Detection And Ranging Colored by Flight Line (single line) Colored by Return Number Colored by Elevation Colored by Classification

LIDAR – Light Detection And Ranging Colored by Flight Line (single line) Colored by Return Number Colored by Elevation Colored by Classification

LIDAR – Light Detection And Ranging Initial LIDAR Elevation Filtered LIDAR Elevation (Bare Ground) Classified LIDAR Surface (Bare Ground and Canopy) Classified LIDAR Surface (Bare Ground )

LIDAR – Light Detection And Ranging San Diego State University Border color infrared photography

LIDAR – Light Detection And Ranging • LIDAR is ~5 -10 ft San point Diego spacing State • Spacing is closer in flight line overlap areas University and in areas with multiple returns

LIDAR – Light Detection And Ranging • Vegetation Structure • Height vs. Width • Shape San Diego State University

LIDAR – Light Detection And Ranging • Vegetation Height 20 ft San Diego State University

LIDAR – Light Detection And Ranging Classified LIDAR Surface (Bare Ground and Canopy) 2000 Color Infrared Image Classified LIDAR Surface (Bare Ground ) 2000 Color Infrared Image (With LIDAR “Canopy” Height) Yellow – Green = 1 -40 ft Height

LIDAR – Light Detection And Ranging • Vegetation Density (% Canopy, % Not 1 st Return) Dense Moderate 1 st Return Points 2 nd, 3 rd, 4 th Return Points Sparse

LIDAR – Light Detection And Ranging San Diego State University

LIDAR Rasterized Point Summary Products ADS 40 Image Maximum Height

LIDAR Rasterized Point Summary Products ADS 40 Image % Canopy

LIDAR Rasterized Point Summary Products ADS 40 Image % Not 1 st Return

LIDAR Rasterized Point Summary Products ADS 40 Image Red: Maximum Height Green: % Canopy Blue: % Not 1 st Return

LIDAR Intensity - Applications • GIS systems – Backdrop imagery – Verify planimetric accuracy of existing images and GIS data – Updating GIS layers • Natural resource management – Presence/absence of vegetation – Vegetation condition – Recent soil disturbance