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GIS In Maryland
Ken Miller
Director, Watershed Information Services
Significant Activities
• Cooperative Road Centerline• Detailed Digital Elevation Models using
LIDAR
• Large-scale digital orthophoto production
• Partnership Building
Highway Information Services
Division
The Maryland The Maryland Statewide Statewide
Cooperative Road Cooperative Road CenterlineCenterline
The Maryland The Maryland Statewide Statewide
Cooperative Road Cooperative Road CenterlineCenterline
Working Together to Integrate the State one Working Together to Integrate the State one County at a time.County at a time.
Working Together to Integrate the State one Working Together to Integrate the State one County at a time.County at a time.
A Sustainable Partnership for A Sustainable Partnership for SuccessSuccess
A Sustainable Partnership for A Sustainable Partnership for SuccessSuccess
Who 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 1:24K maps
• Use of same centerline where possible
• Use of linked/related centerline through unique ID’s 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
What is the SHA Shared Centerline Program?What is the SHA Shared Centerline Program?
• SHA has current centerline of major roads
• SHA is working towards 1:2400 scale centerline data of every public roadway
• Adding ramps, spurs, aux roads, rab’s
• SHA also looking for improved road names as well as addresses
• Willingness to share maintenance and data in future
What Are the Qualities of the Data Under Development?
What Are the Qualities of the Data Under Development?
Benefits to State and Local GovernmentBenefits 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)
Leveraging Existing ProjectsLeveraging Existing Projects
• HISD Investment in Statewide Road Data• Existing Annual Highway Inventory Processes• Highly Accurate County Data
StatusStatus
• 17 of 23 counties participating at some level• Data from 11 counties received by SHA• 2 counties completed: Howard & Montgomery
Significant Activities
• Cooperative Road Centerline
• Detailed Digital Elevation Models using LIDAR
• Large-scale digital orthophoto production
• Partnership Building
LIDAR 101• Light Detection and Ranging
• Laser & light detector mounted in aircraft
• GPS and inertial navigation
• Data storage systems
Basics (cont.)
• Approximately 1.5 points per meter2
• Precise measurements - RMSE 18.5 cm (~ 7.5”)• Supports 2’ contour mapping• Supports 1:2400 scale orthophoto production• Leaf off• 2 meter DEM grid• 20 check-points per land cover category
I-Team Plan for Digital Elevation Model Production
• Use FEMA Use FEMA specificationspecification
Aerial Imagery
Elevation
Geodetic Control
Boundaries
Surface Waters
Transportation
Land Ownership
Maryland Geographic Data Implementation Team Plan, July 2001Maryland Geographic Data Implementation Team Plan, July 2001
Statewide DEM Grid
• 3600 meters square• Row and column identifier
Predicted Tide
Last Return Elevation
Bare-Earth Elevation
Last Return Elevation
Bare-Earth Elevation
Last Return Elevation
Bare-Earth Elevation
Bare-Earth DEMBare-Earth DEM
Bare-Earth DEMBare-Earth DEM
Bare-Earth DEMBare-Earth DEM2-meter Cells2-meter Cells
Intensity ImageIntensity Image
Intensity ImageIntensity Image
LIDAR
2002/2003
2004
Significant Activities
• Cooperative Road Centerline
• Detailed Digital Elevation Models using LIDAR
• Large-scale digital orthophoto production
• Partnership Building
I-Team Plan for Digital Elevation Model Production
• Use MSGIC Use MSGIC specificationspecification
Aerial Imagery
Elevation
Geodetic Control
Boundaries
Surface Waters
Transportation
Land Ownership
Maryland Geographic Data Implementation Team Plan, July 2001Maryland Geographic Data Implementation Team Plan, July 2001
Basic Specifications
• 1:2400-scale resolution
• 0.25 meter pixel
• Based on statewide DEM 1200x1800 meter grid
• State Plane NAD 83 meters
20042004
20042004
20042004
2004200420042004
20042004
20032003
20022002
20032003
20022002
20022002
Significant Activities
• Cooperative Road Centerline
• Detailed Digital Elevation Models using LIDAR
• Large-scale digital orthophoto production
• Partnership Building
MD DNRNOAA\CSCWicomico DorchesterTalbotSUUMES
LIDAR 2004
• DNR – St. Mary’s & 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
C2K Accomplishments
• 4.1.3.3 Protect 20% of Watershed
• 4.1.5 Develop and maintain in each jurisdiction a strong GIS system
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
Landscape Analysis used in Targeting Acquisitions
• Potential properties screened against Green Infrastructure
• Maps created to support acquisition request (BPW)
4.1.5 – Strong GIS• Maryland’s 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
