MNDEM: Digital Data for a Digital Age.

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MN-DEM Digital Data for a Digital Age.
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Jay Bell
Soils
Precision Ag.
University of Minnesota
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Digital Terrain Analysis for Soil Mapping
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Soil Mapping

• For much of Minnesota, different soil types are
  usually associated with different topographic
  positions (Certain soils cling to certain
  slopes).
• Soil surveys are largely based on visual
  interpretation of topography
• DEM and terrain analysis provide quantitative
  tools to map soils at high spatial resolution

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High Resolution Soil Mapping
Slope
Model
Curvature
Soils
Catchment Area
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Uses and AdvantagesHigh Resolution Soil Mapping

• Precision Agriculture
• Urban Planning
• Ecological Studies
• Cost Effective
• Information Intensive

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Dick Chaney
Federal support
Waterways
Corps of Engineers
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US Army Corps
of Engineers
St. Paul District
The Army Corps of Engineers uses elevation data
and Digital Elevation Models (DEMs) to support a
variety of Public Service Missions.
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US Army Corps
of Engineers
St. Paul District
Emergency
Emergency
Operations
Operations
Granite Falls, MN
Minnesota River
April 1997
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Floodplain Delineation
US Army Corps
of Engineers
St. Paul District

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High resolution DEMS will enable more accurate
models, analysis, and derivative products
US Army Corps
of Engineers
St. Paul District

• Flood Modeling
• Wetland delineation
• Landuse/Landcover analysis
• Economic analysis
• Cost mitigation studies
• Planning Assistance to States
• Updated floodmaps to local sponsors
• Local flood zoning maps

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Chuck Fritz
Flooding
Floodplain issues.
Red River Basin Board
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• Digital Elevation Model

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Primary Message

• From a more specific and individual
• flood mitigation perspective, The Red
• River Basin Institute plans to package
• DEMs with existing and acquired data
• sets to provide critical tools for
• residents and decision-makers in the
• Red River Basin.

• Accurate topographic information is critical to
  make informed, defendable water management
  decisions in the flat valley landscape of the Red
  River Basin.

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Potential DEM Mitigation Tools

• Linked with geodetic data and flood forecasting
  models to develop and deliver a web-based
  sandbag calculator to individual residents.
• Link with public drainage and roadway databases
  and to develop a culvert sizing calculator that
  enhances the permit decision-making process by
  local units of government.
• DEMs with fly-by software enable local resource
  professional to educate landowners and managers
  and provide comprehensive landscape perspectives.

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Mike Leegard
Transportation
Photogrammetry
MN/DOT
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At MN/DOT, mapping isnt just for detail design
anymore. Our new generation project managers
use Digital Elevation Models to plan, design and
manage transportation projects of all modes, from
Aeronautic to Transit.
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• INTERREGIONAL CORRIDOR SOLUTIONS.

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• NEW DIGITAL MAPPING PRODUCTS ORTHO-PHOTOS.

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• HYDRAULIC DESIGN MANAGING OUR PROJECTS IN
  CONCERT WITH THE WATERS OF THE STATE.

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Tim Loesch
Wetlands restoration/mitigation
Trails
MN-DNR
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DNR

• At the DNR There are many applications for
  improved elevation data
• Floodplain mapping and the enforcement of the
  FEMA flood plain programs
• Hydrologic and Hydraulic Modeling
• Site Location Process for facilities
• Buildings
• Trails (foot, ATV, Skiing, etc)
• Wetland Restoration
• Watershed Analysis
• Visual Sensitivity Analysis
• Developing Bathymetry data for lakes and rivers
  that could be integrated into overall dataset.
• Orthophoto Generation.

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Matt Moore
Storm Water Management
Watersheds
South Washington County Watershed Dist.
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Dave Claypool
County Perspective
Accurate Mapping
Ramsey County
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Data Accuracy
Planner Vs. Engineer
Most
Least
Cost
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Data Collection Options
Traditional methods
Aerial Photography and Land Surveying
Planner Vs. Engineer
Most
Least
Cost
100 foot contours
2 foot contours
3 foot pixel
1 foot pixel
Minimum field time
Lots of field time
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Data Collection
Typically, due to time/cost constraints data is
collected just to the extent of the project
limits
THE CORRIDOR!
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Data Collection
Limited users of corridor datasets

• However, by
• expanding the
• CORRIDOR, you
• expand the users
• Survey
• Land Use
• Emergency Mgmt
• GIS
• Hydrologists

Working collectively, you can acquire
more/better/current datasets
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Collaboration County Perspective

• DEM
• Hydrology
• Consortium Bids
• Ortho Photos
• Physical Feature Updates
• Shared Costs 40 Savings With Affordability
• Expand Engineering Agreements With MnDOT

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Anticipated Accuracy

• Mapping
• 2 Contour Generation
• Overall general mapping
• All terrain
• 95 confidence level
• 1 Contour Generation
• Special-purpose areas
• Flat/floodplain terrain
• 66 confidence level

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MN-DEM Digital Data for a Digital Age.
Questions Comments.