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akatherine
on FreezingBlue Flashcards.
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Aerial LiDAR
- Poles goes down and bounces back with point data
- Aerial LiDAR permits us to cover major regions
- Prospect info
- Targeting area that have potential
- Conventional survey can then be done to fill in the gaps
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Total data vs. GPS
- Total data is via line of site
- GPS: Not a line of site, but must be able to see the sky
- Multipathing: bouncing off other items, like trees where it could cause error
- The time when doing GPS work makes a difference
- Geometry of the satellites: can be timed when there are more satellites in the area
- Atmospheric data can be influenced
- PDOC: position,
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RTK data
- GPS for recording elevation
- Topographic map
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GPS fundamentals
- At least 4 satellites are required to get an accurate location
- x, y, z and ∆t (change in time)
- Works by factors of: Distance = velocity x time
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RTK GPS
Real-Time Kinematic GPS
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LiDAR modes of use
- Satellite remote sensing
- Aerial photography and remote sensing
- Ground-based geophysics
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Landscape archaeology
studies the way people of the past shaped the land around them, consciously or unconsciously.
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Thermal and Mutlispectral imaging
- Multispectral band combinations that can pick differences up in land cover and change detection
- Differences in soil texture are revealed by fractional temperature variations. So it is possible to identify loose soil that had been prehistoric agricultural fields, or was covering buried remains
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