GIS In Maryland

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GIS In Maryland

• Ken Miller
• Director, Watershed Information Services

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Significant Activities

• Cooperative Road Centerline
• Detailed Digital Elevation Models using LIDAR
• Large-scale digital orthophoto production
• Partnership Building

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The Maryland Statewide Cooperative Road
Centerline

Highway Information Services Division
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Working Together to Integrate the State one
County at a time.
A Sustainable Partnership for Success
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Who

• SHA Highway Information Services Division
• Statutory Mandate for Public Road Data Collection
• Public Road Inventory Database
• Highway Mapping/Cartography
• GIS-based and attributed public highway system
  centerline, numerous map products and
  applications
• SHA has centerline currently good for planning,
  and 124K maps

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What is the SHA Shared Centerline Program?

• Use of same centerline where possible
• Use of linked/related centerline through unique
  IDs will support different geometries
• Help keep data up to date through digital spatial
  data updates on both sides
• Each party does what they do best

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What Are the Qualities of the Data Under
Development?

• SHA has current centerline of major roads
• SHA is working towards 12400 scale centerline
  data of every public roadway
• Adding ramps, spurs, aux roads, rabs
• SHA also looking for improved road names as well
  as addresses
• Willingness to share maintenance and data in
  future

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Benefits to State and Local Government

• MEMA
• Homeland Security
• EOC Emergency Management
• County Planning and Public Works
• County and Municipal 911 Call Centers
• Fulfills Phase II accuracy requirement
• Mutual Aid
• Mapping State Health Concerns (ex. SARS, WestNile
  Virus, Flu)
• Voter Registration Database (Board of Elections)

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Leveraging Existing Projects

• HISD Investment in Statewide Road Data
• Existing Annual Highway Inventory Processes
• Highly Accurate County Data

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Status

• 17 of 23 counties participating at some level
• Data from 11 counties received by SHA
• 2 counties completed Howard Montgomery

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Significant Activities

• Cooperative Road Centerline
• Detailed Digital Elevation Models using LIDAR
• Large-scale digital orthophoto production
• Partnership Building

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LIDAR 101

• Light Detection and Ranging
• Laser light detector mounted in aircraft
• GPS and inertial navigation
• Data storage systems

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Basics (cont.)

• Approximately 1.5 points per meter2
• Precise measurements - RMSE 18.5 cm ( 7.5)
• Supports 2 contour mapping
• Supports 12400 scale orthophoto production
• Leaf off
• 2 meter DEM grid
• 20 check-points per land cover category

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I-Team Plan for Digital Elevation Model Production

• Use FEMA specification

Maryland Geographic Data Implementation Team
Plan, July 2001
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Statewide DEM Grid

• 3600 meters square
• Row and column identifier

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Predicted Tide
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Last Return Elevation
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Bare-Earth Elevation
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Last Return Elevation
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Bare-Earth Elevation
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Last Return Elevation
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Bare-Earth Elevation
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Bare-Earth DEM
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Bare-Earth DEM
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Bare-Earth DEM 2-meter Cells
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Intensity Image
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Intensity Image
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LIDAR
2002/2003
2004
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Significant Activities

• Cooperative Road Centerline
• Detailed Digital Elevation Models using LIDAR
• Large-scale digital orthophoto production
• Partnership Building

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I-Team Plan for Digital Elevation Model Production

• Use MSGIC specification

Maryland Geographic Data Implementation Team
Plan, July 2001
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Basic Specifications

• 12400-scale resolution
• 0.25 meter pixel
• Based on statewide DEM 1200x1800 meter grid
• State Plane NAD 83 meters

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2004
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Significant Activities

• Cooperative Road Centerline
• Detailed Digital Elevation Models using LIDAR
• Large-scale digital orthophoto production
• Partnership Building

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MD DNR NOAA\CSC Wicomico Dorchester Talbot SU UME
S
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LIDAR 2004

• DNR St. Marys part of Charles
• Charles completed their county
• Anne Arundel paid for their county
• Howard paid for their county
• All through 1 contract vehicle
• Same spec, same process
• Significant price break

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C2K Accomplishments

• 4.1.3.3 Protect 20 of Watershed
• 4.1.5 Develop and maintain in each jurisdiction
  a strong GIS system

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4.1.3.3 - 20 Protection

• 19.89 of Maryland protected
• DNR, MDP share responsibility of mapping
  protected lands
• But . . . acres protected NOT all GIS acreages

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Landscape Analysis used in Targeting Acquisitions

• Potential properties screened against Green
  Infrastructure
• Maps created to support acquisition request (BPW)

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4.1.5 Strong GIS

• Marylands Implementation Team (I-Team) Plan
• MDP continues Smart Growth Data Partnership
• DNR provides free access to its GIS data via
  Internet (www.dnr.maryland.gov\gis)
• DNR and MDP are working with local governments to
  improve the Protected Lands database
• DNR works closely with counties sponsoring Rural
  Legacy applications
• MDP conducted its Development Capacity Study to
  inventory lands within Priority Funding Areas
• DNR conducted a Cooperative Geospatial Data
  Survey with local governments
• Maryland Metadata Resource Guide
  www.marylandGIS.net

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Thanks

• Ken Miller
• 410.260.8751
• kenmiller_at_dnr.state.md.us