Proposed Standard:Proposed Standard:United States United States National GridNational Grid

(USNG)(USNG)

Randy Knippel – Dakota CountyRandy Knippel – Dakota County

GCGI Emergency Preparedness GCGI Emergency Preparedness CommitteeCommittee

United States National GridUnited States National Grid

• National standardNational standard– Adopted by FGDC in 2001Adopted by FGDC in 2001

• Implemented by federal agenciesImplemented by federal agencies– Department of Homeland SecurityDepartment of Homeland Security– National Geospatial-Intelligence AgencyNational Geospatial-Intelligence Agency– USGS – National MapUSGS – National Map

• Adopted by several statesAdopted by several states– Florida, Missouri, North Carolina, othersFlorida, Missouri, North Carolina, others

HistoryHistory

• Originated as the Military Grid Originated as the Military Grid Referencing System (MGRS)Referencing System (MGRS)– Global systemGlobal system– Developed in World War 2Developed in World War 2– Adapted from Universal Transverse Adapted from Universal Transverse

Mercator (UTM) systemMercator (UTM) system

• Interoperable with MGRS and UTMInteroperable with MGRS and UTM

Why?Why?

• Not a replacement for data storageNot a replacement for data storage

• Not a replacement for existing systemsNot a replacement for existing systems– Addresses, PLS, Lat / Long, county Addresses, PLS, Lat / Long, county

coordinates, other gridscoordinates, other grids

• Supplement for efficient, interoperable Supplement for efficient, interoperable location referencing and navigationlocation referencing and navigation

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

ScalableScalable

NationalNational

RegionalRegional

LocalLocal

Precision and TruncationPrecision and Truncation

• 18SUJ2337106519 18SUJ2337106519 – 18S – UJ – 23371 – 0651918S – UJ – 23371 – 06519

• 1 meter square, full USNG designation1 meter square, full USNG designation

– UJ2306UJ2306• Assume GZD (18S)Assume GZD (18S)• UJ – 100,000 m squareUJ – 100,000 m square• 23 06 – 1000 m (1 km) square23 06 – 1000 m (1 km) square

– 2337 06512337 0651• Assume GZD and 10 km squareAssume GZD and 10 km square

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

MapMap83538353

(15T VK 83 53)(15T VK 83 53)

MapMapVK85VK85

14TPS14TPS

PS79PS79

70967096

Status MappingStatus Mapping

Making It WorkMaking It Work

• Put grids on mapsPut grids on maps

• Define standard map productsDefine standard map products

• Create supporting documentsCreate supporting documents

• TrainingTraining