Standardized Fire MapsStandardized Fire Maps

Randy KnippelRandy Knippel

Dan CastanedaDan Castaneda

Dakota County Office of GISDakota County Office of GIS

Map BookMap Book

U.S. National GridU.S. National Grid

Map PagesMap Pages

Street IndexStreet Index

Map Map LegendLegend

Map Map IndexIndex

Map Map 84548454

Street Street IndexIndex

Forest Ln.Forest Ln.

PDF Map BookPDF Map Book

Maps OnlineMaps Online(DCGIS)(DCGIS)

MapMapVK85VK85

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

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

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 right to leftIncreases right to left

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

Grid Zone DesignationGrid Zone Designation 6 x 8 Degrees 6 x 8 Degrees

100 Km Squares100 Km Squares

10 Km Squares10 Km Squares

USNG:15T VK 85USNG:15T VK 85

1 Km Squares1 Km Squares

USNG:15T VK 75USNG:15T VK 75

MapMap74567456

(15T VK 74 56)(15T VK 74 56)

U.S. National GridU.S. National Grid

Three ComponentsThree Components

• 18SUJ233710651918SUJ2337106519

• 18S UJ 23371 0651918S UJ 23371 06519

• 18SUJ2337065118SUJ23370651

MapMapVK75VK75

74567456

841546841546(15T VK 841 546)(15T VK 841 546)

MapMap84548454

(15T VK 84 54)(15T VK 84 54)

Grid Zone DesignationGrid Zone Designation(GZD)(GZD)

100,000 Meter Square100,000 Meter Square

TruncatingTruncating

Key ResourcesKey ResourcesCritical InfrastructureCritical Infrastructure

Vulnerable PopulationVulnerable Population

ExamplesExamples

• What map book page includes Eastview What map book page includes Eastview High School?High School?– 84548454

ExamplesExamples

• What is the map book page for 14105 What is the map book page for 14105 Forest Ln.?Forest Ln.?– 84548454

ExamplesExamples

• What is the USNG 100m square for What is the USNG 100m square for 14105 Forest Ln.?14105 Forest Ln.?– 15T VK 841 546 15T VK 841 546

ExamplesExamples

• What is at 15T VK 842 542?What is at 15T VK 842 542?– Trail entrance to Cedar Isle ParkTrail entrance to Cedar Isle Park

ExamplesExamples

• What is the USNG 100m square for What is the USNG 100m square for 13282 Findlay Way?13282 Findlay Way?– 15T VK 845 55815T VK 845 558

ExamplesExamples

• What is at 15T VK 858 545?What is at 15T VK 858 545?– Scott Highlands Middle SchoolScott Highlands Middle School

ExamplesExamples

• What is at 15T VK 853 551?What is at 15T VK 853 551?– Moeller ParkMoeller Park– Trail intersectionsTrail intersections

ExamplesExamples

• Find 6565 134Find 6565 134thth Ct. W. Ct. W.– 15T VK 842 55815T VK 842 558