Mapping above ground planimetric features using LiDARDan Senner GIS Analyst Robert Chavez CAD

Coordinator

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

Current Site Plan Inaccuracies

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Current Site Plan Inaccuracies

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Missing Site in GIS

CAD Site Plan

Current Site Plan Inaccuracies

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Misplaced Sites in GIS

CAD Site Plan

Current Site Plan Inaccuracies

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Duplicate facility 282 on top does not exist

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”

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

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

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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