2011 MN GISLIS PANEL DISCUSSION

THURSDAY, OCT 6, 2011

LiDAR ACTIVITIES IN MINNESOTA

SPEAKERS:TIM LOESCH, MNDNR, tim.loesch@state.mn.us

PETER JENKINS, MNDOT, peter.jenkins@state.mn.us

RON WENCL, USGS, rwencl@usgs.gov

LES EVERETT, UNIVERSITY OF MINNESOTA evere003@umn.edu

NANCY RADER, MN GEO, nancy.rader@state.mn.us

STATEWIDE LiDAR COLLECTINTRODUCTIONSTATUS TIM LOESCH, MNDNR

DATA VALIDATION & ACCURACYPETER JENKINS, MNDOT

MINNESOTA ELEVATION COMMITTEE

• The Committee’s position was to spend as much of the money on acquisition as possible

• Independent accuracy validation was essential

• How to accomplish this ?– The first project (SE Mn) was full of surveyors &

engineers who were willing to help

– In the SW Project it was mostly county engineers

– So far in the Metro & Arrowhead it has been both

– This has been a sample of the in-kind effort that we have seen from all levels of government

SOUTHEAST MINNESOTA LIDAR PROJECT

S.E. MINNESOTA LIDAR PROJECT HIGHEST & LOWEST ACCURACY

CountyRMSE CVA Agency Method

Wabasha 10.6 County RTKOlmsted 11.7 County VRSSteele 12.5 County RTKDodge 12.9 County VRSHouston 13.4 County RTKFreeborn 14.4 County VRSFillmore 15.5 MnDOT VRSMower 16.1 County VRSWinona 16.1 County RTK

S.W. MINNESOTA PROJECT HIGHEST & LOWEST ACCURACY

CountyRMSE CVA Agency Method

Rock 7.6 MnDOT VRSNicollet 9.2 County RTKPope 9.2 MnDOT VRS

Swift 14.4 MnDOT VRSChippewa 14.9 County RTKLac Qui Parle 14.9 County RTK

CONCLUSIONS

• There is a consistent spread in the RMSE values between the SE and SW projects

• The methodology and personnel seem to have little influence in the accuracy results

• Terrain has only a small influence in the accuracy results

• The error budget in GPS is +/- 2.5 cm, which could explain most of what we see

• Regardless the consultants have consistently meet contract deliverable specifications

Questions ???Thank You

Peter Jenkins, PLS, CFedS

FEDERAL PERSPECTIVEINVENTORY RESULTSNATIONAL STANDARDS

RON WENCL, USGS

CONSERVATION APPLICATIONS OF LiDAR TRAINING LCCMR PROJECTLES EVERETT, UNIVERSITY OF MINNESOTA

Audience and Method

For Conservation Professionals who use GIS

Hands-on workshops in computer labs

Repeated at multiple locations in MN

In ArcGIS or Civil 3D (1 Module)

Training Modules

1. Basics of Using LiDAR Data

2. Terrain Analysis

3. Hydrologic Applications

4. Engineering

5. Wetland Mapping

6. Forest and Ecological Applications

Contacts

Project Manager: Les Everett, UM Water Resources Center evere003@umn.edu

Program Coordinator: Ann Lewandowski, UM Water Resources Centeralewand@umn.edu

Project Web Site: http://tsp.umn.edu/lidar

STATE LiDAR RESEARCH AND EDUCATION COMMITTEESPRING SURVEYWEB PORTALTRAININGSHELLY SENTYZ, MNDNR

STATE LiDAR RESEARCH AND EDUCATION COMMITTEE

STATE LiDAR RESEARCH AND EDUCATION COMMITTEE

Tim Loesch, MNDNR, tim.loesch@state.mn.us

Ron Wencl, USGS, rwencl@usgs.gov

Peter Jenkins, MnDOT, peter.jenkins@state.mn.us

Shelly Sentyrz, MNDNR, shelly.sentyrz@state.mn.us

Sean Vaughn, MNDNR, sean.vaughn@state.mn.us

Les Everett, University of Minnesota, evere003@umn.edu

http://www.mngeo.state.mn.us/chouse/elevation/index.html

FOR MORE INFORMATION: