mapping above ground planimetric features using lidar dan senner gis analystrobert chavez cad...
TRANSCRIPT
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Mapping above ground planimetric features using LiDARDan Senner GIS Analyst Robert Chavez CAD
Coordinator
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Project Background
• Storm/Sanitary/Water piping conversion project completed
• Identified inaccuracies in District site plans/ campus map
• District GIS application PlantMan created
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Jones Island
• Located in Milwaukee, WI
• Built in the early 1900’s
• Current site plan believed to be established by heads up digitization
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GOAL: To create a survey grade site plan at Jones Island
Uses:
• Update PlantMan• Creation of Master CAD site drawings• All future District contracts will utilize Master
site plan• Eliminate inconsistencies between GIS & CAD
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Current Site Plan Inaccuracies
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Current Site Plan Inaccuracies
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Missing Site in GIS
CAD Site Plan
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Current Site Plan Inaccuracies
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Misplaced Sites in GIS
CAD Site Plan
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Current Site Plan Inaccuracies
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Duplicate facility 282 on top does not exist
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Site Plan Capture OptionsFirst Option:
• Traditional Survey done internally
• Work estimated at roughly 800 hours for Jones Island
Second Option:
• Develop RFP for work to be done by a consultant using LiDAR
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Deliverables
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Consultant
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• RA Smith selected 10-1-2014
• Work commenced 11-10-14
• Final deliverable received 12-3-14
• Significant time and cost savings to District
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Results“Improved Accuracy”
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Results“Improved Accuracy”
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Results“Improved Accuracy”
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Results “Level Of Detail”
Original Site Plan
Updated Site Plan
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Results “Level Of Detail”
Original Site Plan
Updated Site Plan
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Scanner Details
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Leica P20: 210 scan positions at JI Three minutes per scan
(not including set-up) Line-of-sight scanning Between 16 & 20 million
points per scan Survey Grade accuracy to
an eighth of an inch
Deliverables: Final IMP (native) size
• 135GB PTS file size
• 112GB, 12 files TruView data set
• 11.4GB
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TruView
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Point Cloud Tools
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GIS & CAD
• Improve GIS feature accuracy
• Surface creation to look at settlement issues
• Consistency between GIS & CAD
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Looking Ahead• South Shore Site Scan
• Import data to SDE
• Update PlantMan
• Test incorporating TruView into PlantMan
• Create Master CAD site drawing
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QUESTIONS?
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