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Mapping%20is%20the%20foundation%20of%20the%20geological%20sciences.

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Introduction. Mapping is the foundation of the geological sciences. Three basic elements in geologic map. Location ... GPS: global positioning to a centimeter. ... – PowerPoint PPT presentation

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Title: Mapping%20is%20the%20foundation%20of%20the%20geological%20sciences.


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Introduction
  • Mapping is the foundation of the geological
    sciences.
  • Three basic elements in geologic map
  • Location
  • Lithologic information
  • Spatial or geometrical relationships
  • Providing the digital data sets representing the
    real earth so that a virtual earth can be
    simulated on the computer and then virtual model
    displayed and analyzed in virtual reality
    system.

3
CYBERMAPPING Integration of GPS, Reflectorless
Laser Rangefinders and GIS
4
Technology
  • GPS global positioning to a centimeter.
  • Lasers relative positioning of decimeter to
    centimeter.
  • GIS mapping functionalities.
  • Digital Cameras
  • ??

5
GPS Techniques
Comparing accuracy, baseline, and time required
for positions. SPS, PPS autonomous position.
OTFon-the-fly kinematic post-processing.
RTKreal time OTF kinematic..
6
Summary of the approximate accuracy of GPS
positioning versus methods. (Modified from
Featherstone, 1995)
7
RTK Base Station
Radio Transmitter
GPS Base Antenna
8
RTK Rover Station
9
Diffuse reflection
10
904 nm diffuse fractional reflections of common
material
11
Common Type of Reflector Laser Rangefinder
A. Laser Atlanta Advantage CI B. Riegl Scout. C.
Leica Binocs. D. Laser Atlanta Advantage CI with
PRO XL DGPS. E. LaserTech Criterion. F.
LaserTech Impulse.
12
Characteristics of common types of laser
rangefinders
Manufacturer Con. Max. Range(m) Comp. Encoder Hor., Ver Range(m)
Laser Atlanta yes 500 yes yes 0.1-0.50.20.15
MDL yes 100-500 yes yes 0.1-0.50.20.15
ALS(MDLLA) yes 500 no Theod 0.010.010.15
ALS(MDLRiegl) yes 1000 no Theod 0.010.010.15
Laser Tech. no 2200 yes no 0.50.20.15
Leica no 100 yes no 0.50.10.15
Riegl Can 700 no no ?0.20.15
Total Station May 100-200 no Theod 0.010.010.01
ALS MDL theodolite with a Laser Atlanta (LA)
or Riegl laser rangefinder.
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