GIS In Maryland Ken Miller Director, Watershed Information Services

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

Thanks

Ken Miller

410.260.8751

kenmiller@dnr.state.md.us