Practical Applications Of The U.S. National Grid In Minnesota
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Practical Applications Of The Practical Applications Of The U.S. National Grid In U.S. National Grid In
MinnesotaMinnesota
Randy KnippelRandy Knippel
Dakota CountyDakota County
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AgendaAgenda
• National Grid MapsNational Grid Maps– Standardized fire mapsStandardized fire maps– Overview of National GridOverview of National Grid
• Web resourcesWeb resources– Places to startPlaces to start– Data and toolsData and tools
• ArcGISArcGIS– Tools, tips, and tricksTools, tips, and tricks
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Standardized Fire MapsStandardized Fire Maps
Randy KnippelRandy Knippel
Dakota CountyDakota County
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Map BookMap Book
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U.S. National GridU.S. National Grid
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Map PagesMap Pages
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Street IndexStreet Index
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Map Map LegendLegend
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Map Map IndexIndex
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Map Map 74567456
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Street Street IndexIndex
Dana Dr.Dana Dr.
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PDF Map BookPDF Map Book
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Maps OnlineMaps Online(DCGIS)(DCGIS)
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MapMapVK75VK75
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United States National GridUnited States National Grid(USNG)(USNG)
• National standard since 2001National standard since 2001• Adopted by federal agenciesAdopted by federal agencies
– FEMA, DHS, NGA, USGSFEMA, DHS, NGA, USGS
• Adopted by several statesAdopted by several states– Florida, Missouri, North Carolina, othersFlorida, Missouri, North Carolina, others– Minnesota (March 25, 2009)Minnesota (March 25, 2009)
• Military Grid Referencing SystemMilitary Grid Referencing System– Metric systemMetric system
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Why?Why?
• Multiple gridsMultiple grids– Needed one for everyoneNeeded one for everyone
• Need efficient location referencingNeed efficient location referencing
• Need interoperabilityNeed interoperability– Across jurisdictionsAcross jurisdictions– Local, state, federal, militaryLocal, state, federal, military
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What about Lat / Long?What about Lat / Long?
• Not intuitiveNot intuitive– Degrees, minutes, secondsDegrees, minutes, seconds
• Several formatsSeveral formats– DMS, DMS.sss, DM.mmm, D.dddDMS, DMS.sss, DM.mmm, D.ddd– LongitudeLongitude
• + / -+ / -• West / eastWest / east• Increases left to rightIncreases left to right
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What about Lat / Long?What about Lat / Long?
• How big is a degree?How big is a degree?– It variesIt varies
• 69 miles at the equator69 miles at the equator• Longitude gets smaller toward polesLongitude gets smaller toward poles• 50 miles in Dakota County50 miles in Dakota County
• Distance calculations are difficultDistance calculations are difficult
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Grid Zone DesignationGrid Zone Designation 6 x 8 Degrees 6 x 8 Degrees
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100 Km Squares100 Km Squares
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10 Km Squares10 Km Squares
USNG:15T VK 75USNG:15T VK 75
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1 Km Squares1 Km Squares
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MapMap74567456
(15T VK 74 56)(15T VK 74 56)
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U.S. National GridU.S. National Grid
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Three ComponentsThree Components
• 18SUJ233710651918SUJ2337106519
• 18S UJ 23371 0651918S UJ 23371 06519
• 18SUJ2337065118SUJ23370651
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MapMapVK75VK75
74567456
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741565741565(15T VK 741 565)(15T VK 741 565)
MapMap74567456
(15T VK 74 56)(15T VK 74 56)
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Grid Zone DesignationGrid Zone Designation(GZD)(GZD)
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100,000 Meter Square100,000 Meter Square
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TruncatingTruncating
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TruncatingTruncating
USNG:15T VK (100Km square)VK is unique for 800 miles
in any direction
USNG:15T VK (100Km square)VK is unique for 800 miles
in any direction
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ScalableScalable
NationalNational
RegionalRegional
LocalLocal
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Precision and TruncationPrecision and Truncation
• 18SUJ2337106519 18SUJ2337106519 – 18S UJ 23371 0651918S UJ 23371 06519
• 1 meter precision, full USNG designation1 meter precision, full USNG designation
– UJ2306UJ2306• Assume GZD (18S)Assume GZD (18S)• UJ – 100,000 m precision (100 km square)UJ – 100,000 m precision (100 km square)• 23 06 – 1000 m precision (1 km square)23 06 – 1000 m precision (1 km square)
– 2337 06512337 0651• 10 m precision10 m precision• Assume GZD and 100 km squareAssume GZD and 100 km square
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Key ResourcesKey ResourcesCritical InfrastructureCritical Infrastructure
Vulnerable PopulationVulnerable Population
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• www.gis.state.mn.uswww.gis.state.mn.us
14TPS14TPS
PS79PS79
70967096
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National Spatial Data National Spatial Data Infrastructure (NSDI)Infrastructure (NSDI)
Cooperative Agreement Cooperative Agreement Program (CAP)Program (CAP)
• Category 5: Building data stewardshipCategory 5: Building data stewardship– SchoolsSchools– Hospitals / clinicsHospitals / clinics– Police stationsPolice stations– Fire stationsFire stations
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Tying It All TogetherTying It All Together
• Put USNG on maps!Put USNG on maps!
• Define standard map productsDefine standard map products– Seamless across jurisdictions (?)Seamless across jurisdictions (?)
• Include critical assets / key resourcesInclude critical assets / key resources– StructuresStructures
• Create supporting documentsCreate supporting documents
• TrainingTraining
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The Romer ScaleThe Romer Scale
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Examples – Examples – VK75
• What is at 15T VK 782 571?What is at 15T VK 782 571?– Burnsville City HallBurnsville City Hall
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ExamplesExamples
• What is at 15T VK 7389 5116?What is at 15T VK 7389 5116?– small buildingsmall building
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ExamplesExamples
• What is at 15T VK 8056 5724?What is at 15T VK 8056 5724?– BuildingBuilding
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ExamplesExamples
• Find 15T VK 6890 5362?Find 15T VK 6890 5362?– BuildingBuilding
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ExamplesExamples
• What map book pages cover Burnsville What map book pages cover Burnsville Center (35W – 35E interchange)?Center (35W – 35E interchange)?– 76547654– 77547754
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Examples - Examples - Mapbook
• What is the USNG 100m square for What is the USNG 100m square for 3309 Dana Dr.?3309 Dana Dr.?– 15T VK 745 56415T VK 745 564
• Find 3309 Dana Dr. on VK75 Find 3309 Dana Dr. on VK75
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ExamplesExamples
• What is at 15T VK 758 553?What is at 15T VK 758 553?– Acorn ParkAcorn Park
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ExamplesExamples
• What is the USNG 100m square for What is the USNG 100m square for 3801 Azalea Pl.?3801 Azalea Pl.?– 15T VK 740 553 15T VK 740 553
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ExamplesExamples
• What is at 15T VK 752 563?What is at 15T VK 752 563?– Edward Neill ElementaryEdward Neill Elementary
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ExamplesExamples
• What is at 15T VK 743 576?What is at 15T VK 743 576?– Rudy Kraemer Nature PreserveRudy Kraemer Nature Preserve– Trail intersectionsTrail intersections
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ExamplesExamples
• Find 12972 Morgan Pl.Find 12972 Morgan Pl.– 15T VK 757 572 15T VK 757 572
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