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Benefits of Base Mapping:Virginia Base Mapping Program
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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 ?