LIDAR%20

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

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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

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LIDAR LIght Detection And Ranging
1st
2nd
6.5 ft
3rd
4th
1st, 2nd, 3rd, and 4th Returns Have Different X,Y
(Z)
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LIDAR Light Detection And Ranging
Colored by Flight Line (single line)
Colored by Elevation
Colored by Return Number
Colored by Classification
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LIDAR Light Detection And Ranging
Colored by Flight Line (single line)
Colored by Elevation
Colored by Return Number
Colored by Classification
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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 )
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LIDAR Light Detection And Ranging
Border color infrared photography
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LIDAR Light Detection And Ranging

• LIDAR point spacing is 5-10 ft
• Spacing is closer in flight line overlap areas
  and in areas with multiple returns

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LIDAR Light Detection And Ranging

• Vegetation Structure

• Height vs. Width
• Shape

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(No Transcript)
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LIDAR Light Detection And Ranging

• Vegetation Height

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

• Vegetation Density ( Canopy, Not 1st Return)

Dense
Moderate
Sparse
1st Return Points
2nd, 3rd, 4th Return Points
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LIDAR Light Detection And Ranging
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LIDAR Rasterized Point Summary Products

ADS40 Image
Maximum Height
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LIDAR Rasterized Point Summary Products

ADS40 Image
Canopy
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LIDAR Rasterized Point Summary Products

ADS40 Image
Not 1st Return
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LIDAR Rasterized Point Summary Products

ADS40 Image
Red Maximum Height
Green Canopy
Blue Not 1st Return
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LIDAR Intensity Image
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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

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False-color imagery
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LIDAR Light Detection And Ranging

• Specialized Software (edit, surface, terrain
  analysis, visualization)

• MARS (Merrick Company)
• QT Modeler (Applied Imagery)
• TerraScan (Terrasolid)
• LIDAR Analyst (Visual Learning Systems)
• - Feature and change extraction (raster) - No
  editing or surface interpolation