Minnesota Elevation Mapping Project Public Meeting Presentation Willmar, Marshall, Worthington,...

Minnesota Elevation Mapping Project

Public Meeting PresentationWillmar, Marshall, Worthington, Mankato

September 24th, 2009

04/10/23 Minnesota Elevation Mapping Project


Agenda for today’s meetingIntroductions and Overview (10 minutes)

An Introduction to LiDAR (15 minutes) The Southeast Minnesota Mapping Initiative

The Minnesota Elevation Project (15 minutes) Goals Timelines Partnering Opportunities

Q & A (20 minutes)



Steering CommitteeTim Loesch – MnDNR

Project oversight and technical guidance

Chris Cialek – MnGEO State agency coordination and contracting

Pete Jenkins – MnDOT Validation point coordination and technical guidance

Ron Wencl – USGS Coordination with Federal activities



What is LiDAR?What is LiDAR?

LiLight ght DDetection etection aand nd RRangingangingLaser RangefinderLaser RangefinderInertial Measurement UnitInertial Measurement UnitGPSGPSOn-Board ComputerOn-Board Computer

Produces accurate and detailed land Produces accurate and detailed land elevation dataelevation data

Hydrologic analysisHydrologic analysisConstruction Pre-designConstruction Pre-design1 – 2 Foot contours1 – 2 Foot contours

Slide courtesy of USGS

Source: Aero-Metric, Inc.


AdvantagesLarge areas can be gathered economicallyData has a wide variety of applicationsCan penetrate some level of ground-coverHigh level of accuracy and precision

<1 meter horizontal <15 cm vertical 3 cm vertical seperation



LimitationsLimited window of opportunity to collect

Vegetation and snow free periods in the spring and fall Flooding is bad too!

Cannot penetrate Water Heavy canopy cover Rain, Snow, Clouds

Lots of data volumeNew technology and data



The typical LiDAR Project involvesDefinition of Project Requirements

Accuracy, Extent, Projection, Delivery Formats

Mission planning & executionData ProcessingProduct GenerationData Delivery/distributionValidation and Acceptance




Saturday August 18th – 2007Tropical Storm Erin24-hour rain totals

15.10” Hokah 17” – Caledonia

• (unofficial)



Towns EvacuatedStockton, Houston, Elba, Minnesota City and portions of WinonaWhitewater State Park

4,200 Homes Damaged7 Deaths$67 Million Damage



7 Counties Declared Disaster Areas

Steele, Dodge, Olmsted, Wabasha, Winona, Fillmore, Houston

Special Session Legislation appropriated monies for flood relief and mitigation


Minnesota Elevation Mapping ProjectGreat Example of Cooperation and Partnering

$625K – State of MN (flood recovery funds) DNR – Project Management and oversight DOT – Validation and project support

$75K – USGS Cooperative Agreement$122K – Mower and Freeborn Counties

Shell Rock River Watershed District Turtle Creek Watershed District Cedar River Watershed District

County Governments Surveyors GIS Technicians



ObjectivesTo support flood mitigation and prevention effortsProduce a Highly Accurate Elevation Data setFEMA specificationsPublicly available data – no restrictions



DeliverablesClassified LAS Files

Vegetation, Buildings, Bare Earth, Bridges

Edge of Water Break lines2’ Contours – Break line Enforced1 meter DEM units in meters – Break line Enforced

ProjectionUTM Zone 15 projection, NAD83 DatumVertical Datum NVD88

Breaklines


GEOSPATIAL COORDINATION

TECHNICAL INFRASTRUCTURE

TECHNICAL SUPPORT

Coordination, Outreach, Communication

Data Coordination

TechnologyCoordination

Data Services

Web Services

Training

GuidanceConsulting &

Project Support

New Geographic Information Office

Dr. David Arbeit - Minnesota’s Geographic Information Officer

www.gis.state.mn.us/committee/MSDI


Minnesota Statewide ProjectsDigital Elevation Committee

Governor’s Council on Geographic Information

Working to achieve publicly available, high accuracy statewide elevation data

Federal, State and County representatives

Limited funding Ensure data compatibility across collects via standards Provided guidance and technical expertise



Minnesota Clean Water Legacy ActCitizens of the state have invested in water qualityHigh resolution elevation data can be used for all future water quality projects

Legislative leadership from:Representative Rick Hanson (39A Dakota Co.)

Senator Ellen Anderson (66 St. Paul)



Project Scope and Costs40,000 square miles to complete state$8.5 million

Supported Funding$2.8 Million FY10$2.8 Million FY11

Return to Legislature for additional $2.9 million if necessary



The ScheduleJuly Form steering committeeSeptember Public MeetingsOctober Design RFPNovember Post RFPDecember Award contract(s)Spring 2010 First acquisition flight Fall 2010 Data delivery



Three PhasesSOUTHWEST – including Minnesota River BasinCENTRAL LAKES - Mississippi River BasinARROWHEAD – Lake Superior Basin



Anticipated Project DeliverablesPoint data – LiDAR LAS filesEdge of water break lines2’ Contours – Break line Enforced1 meter DEM units in meters – break line enforced

Projection and DatumUTM Zone 15 projection, NAD83 datumVertical Datum NAVD88

NO concurrent ortho-imagery




Data will be publicly availableDNR and MnGEO

Actively exploring web delivery options• Web Services

– Print a map with an Air Photo backdrop with 2’ contours?• Clip and Ship products

USGS National Elevation Dataset (NED - http://ned.usgs.gov/)

• Raster DEMs Center for LiDAR Coordination and Knowledge (CLICK)

• LAS Point Cloud Data (http://lidar.cr.usgs.gov/)

SE Mn Users Group


LiDAR Viewer - http://iwi.houstoneng.com/iwi_lidar/iwi.html



Data will be publicly availableDNR and MnGEO

Actively exploring web delivery options• Web Services

– Print a map with an Air Photo backdrop with 2’ contours?• Clip and Ship products

USGS National Elevation Dataset (NED - http://ned.usgs.gov/)

• Raster DEMs Center for LiDAR Coordination and Knowledge (CLICK)

• LAS Point Cloud Data (http://lidar.cr.usgs.gov/)


Partnering OpportunitiesCounty and local government

County GIS Coordinator • Point of Contact for Data Delivery• Data conversion and distribution within the county

Survey/Engineering point of contact• Validation point collection

Sharing of existing high-resolution data

Federal Cost sharing opportunities to stretch $’s




Vertical Accuracy Validation Surveyed points with x,y,z

100 Points per County 20 points in each of 5 cover categories

Help from county surveyors and other staffWhy do we need this?

Data Validation – we got what we bought Data Integrity – we want people to trust the data



SE Minnesota 1,092 Surveyed Validation Points!

SE Minnesota LiDAR Update


Winona County Validation Report

RMSE across cover Types



Winona County Validation Report


Thank you for attendingQ&A


Minnesota Elevation Mapping Project Public Meeting Presentation Willmar, Marshall, Worthington,...

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