ortho benefits

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Benefits of Base Mapping:Virginia Base Mapping Program

Dan Widner, GIS CoordinatorVITA

John Copple, CEOThe Sanborn Map Company, Inc.

NSGIC ConferenceOctober 2009

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Agenda• Virginia Base Map Overview• Base Map Program “Upgrades”• Imagery Delivery Methods • Applications of the base map imagery• Success stories• Questions

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Virginia Base Map Overview• 2002-complete statewide high resolution

(2 foot, 1 foot, or 6 inch) imagery coverage

• 2006/2007-first update completed at a higher base resolution (1 foot with 6 inch upgrades)– Contours and Structure Outline upgrades

were also offered

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Virginia Base Map Overview• 2009 – 2012 Update in progress

– 1 Foot Base Resolution Statewide• Includes Infrared Band• 6” and 3” Resolution Upgrades Available

– Multiple Additional Upgrade Options Available• Contours• Planimetrics• True Ortho• Off Year Flights• LiDAR

• 3D Buildings• Land Cover Mapping• Rapid Response

Services

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2009/2011 Flight Areas

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2009 Orthophoto - 1 Foot

BrunswickCounty

NaturalColor

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2009 Orthophoto - 1 Foot

BrunswickCounty

ColorInfrared

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2009 Orthophoto - 6 Inch

City ofPortsmouth

NaturalColor

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2009 Orthophoto - 6 Inch

City ofPortsmouth

ColorInfrared

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2009 Orthophoto - 3 Inch

City ofFredericksburg

NaturalColor

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2009 Orthophoto - 3 Inch

City ofFredericksburg

ColorInfrared

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2009 Orthophoto - 3 Inch

Saint Mary’s

Catholic School

Alexandria

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Base Map: Additional Upgrades• 4 Foot Contours

– Halifax County

• 2 Foot Contours– Blacksburg– Charlottesville– Fredericksburg– Hopewell

• Impervious Surface– James City County

• Planimetrics– VCU– Blacksburg

• 3D Buildings– VCU

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VGIN Internet Map Services

Map Services currently available include:– Imagery

• 2002• 2006/2007• NAIP (True Color and CIR)• 2009 Preliminary (True Color and CIR)

– Geocoding• Based on RCL, Navteq, and ESRI data

• Users are required to subscribe and pay appropriate fee (if necessary)

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Sanborn Online• New delivery mechanism being provided

by Sanborn• Allows users to choose and order most

recent VBMP imagery– State and Local Government (Cost of

Reproduction/Shipping)– Commercial (Full Cost Based on Current Rates)

• Functionality– Format, projection, delivery media, etc.

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Sanborn Online

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Applications of Base Map Imagery• Decreased emergency response time to

911 calls throughout the Commonwealth– Imagery loads into the PSAP system to assist

dispatchers in an emergency

• Established a level playing field for all local governments to experience GIS

• Supports economic development

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Applications of Base Map Imagery• Facilitates GIS data creation and editing

– VGIN road centerline editing project– VGIN merges VDOT data and local government

data sets to create a single, up-to-date road centerline data layer for entire Commonwealth

• Contour development• Parcel editing• Land classification mapping• Tax assessment

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Success Stories: BlacksburgProblem: Increase emergency

responsiveness Solution: Accurate high-resolution orthos

“Orthos provide HUGE benefits with man hunts, evidence mapping, & court room presentations.”

-Katherine Smith, GIS Coordinator

Data products utilized:-6 inch orthoimagery as base map

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Success Stories: BlacksburgProblem: Accuracy issues with existing

planimetric dataSolution: Purchase updated planimetrics

“Primary purpose of planimetric update is to improve our data integrity to support analysis.”-Katherine Smith, GIS Coordinator

Data products utilized:-Update planimetric features using 6-in GSD

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Success Stories: BlacksburgProblems: 1. Where do we stage the rescue squad in our

region? 2. Where do we expand the transportation system in

our region?Solution: Conduct site and transportation analysis

Data products utilized:-Updated planimetric features-6-inch orthoimagery-2-ft. contours-comprehensive coded feature database

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Success Stories: Blacksburg Country ClubProblem: How do we manage our golf

course grounds and monitor maintenance?

Solution: Use high resolution imagery inside a high-tech management

system known as CourseVision.

Data products utilized:-6 inch orthoimagery

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Success Stories: Prince WilliamGoal: Set up Storm Water UtilityProblem: How much water run-off occurs

within the county?Solution: Calculate impervious surfaces

within county boundaries

Utilized:-base map imagery-existing parcel database-premium impervious mapping services

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Success Stories: Prince William

Enhanced Land Cover

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Success Stories: Prince William

Premium Impervious

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Questions ?