Mapping above ground planimetric features using LiDAR Dan Senner GIS AnalystRobert Chavez CAD...

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

2

Jones Island

• Located in Milwaukee, WI

• Built in the early 1900’s

• Current site plan believed to be established by heads up digitization

3

4

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

5

Current Site Plan Inaccuracies

6

Missing Site in GIS

CAD Site Plan

Current Site Plan Inaccuracies

7

Misplaced Sites in GIS

CAD Site Plan

Current Site Plan Inaccuracies

8

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

9

Deliverables

10

Consultant

11

• RA Smith selected 10-1-2014

• Work commenced 11-10-14

• Final deliverable received 12-3-14

• Significant time and cost savings to District

12

Results“Improved Accuracy”

13

Results“Improved Accuracy”

Results“Improved Accuracy”

14

15

Results “Level Of Detail”

Original Site Plan

Updated Site Plan

16

Results “Level Of Detail”

Original Site Plan

Updated Site Plan

Scanner Details

17

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

18

Point Cloud Tools

19

GIS & CAD

• Improve GIS feature accuracy

• Surface creation to look at settlement issues

• Consistency between GIS & CAD

20

Looking Ahead• South Shore Site Scan

• Import data to SDE

• Update PlantMan

• Test incorporating TruView into PlantMan

• Create Master CAD site drawing

21

QUESTIONS?

22