basic surveying knowledge for high definition scanning
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Basic Surveying Knowledge for High Definition Scanning . Steven Rames, PE/LS September 12, 2013. Youtube Video. Background Knowledge to HDS. Equipment. Levels (Dumpy, Auto, Digital ) Transit Theodolite EDM – Electronic Distance Measurement Total Station - PowerPoint PPT PresentationTRANSCRIPT
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BASIC SURVEYING KNOWLEDGE FOR HIGH DEFINITION SCANNING
Steven Rames, PE/LSSeptember 12, 2013
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BACKGROUND KNOWLEDGE TO HDS
Youtube Video
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Equipment• Levels (Dumpy, Auto, Digital)• Transit• Theodolite• EDM – Electronic Distance Measurement• Total Station• GPS – Global Positioning System• LiDAR – Light Detection and Ranging• HDS - High Definition Scanning• Photogrammetry.
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Equipment - Levels
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Equipment – Transit/Total Station
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Equipment - Modern
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Examples
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Datum(s)
• Horizontal/Vertical–Assumed–Local–Building Based–Geodetic–ECEF–National
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Datums - Examples
• Horizontal– Latitude, Longitude– NAD 27– NAD 83– 0,0– 1000.00,10,000.00– State Plane Coordinates– UTM– NTRS
• Vertical– Sea Level– NAVD29– NGVD88– GRAVD– Geoid– Ellipsoid– Ground/Floor– 100.00
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Control
• System of horizontal and vertical positions with know accuracy
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HDS Uses
• Forensics• Architecture• Engineering• Historical Preservation• Science/Exploration• Construction• Surveying• Utilities Management
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• Static• Mobil• Airborn• Hydrographic• Ground Penetrating
Methods of HDS
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Surevey Exercises
• Horizontal Measurement– Chaining
• Plumbing• Sag• Thermal
– Cloth Tape– Pacing
• Leveling– Notes
• Angles
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Leveling
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Questions
• Sag – 30 Lbs Pull offset the sag in a 100.00’ chain
• Thermal ChangeC=0.00000645(T-68)100