Practical Applications Of The U.S. National Grid In Minnesota Randy Knippel Dakota County

Agenda National Grid MapsNational Grid Maps –Standardized fire maps –Overview of National Grid Web resourcesWeb resources –Places to start –Data and tools ArcGISArcGIS –Tools, tips, and tricks

Standardized Fire Maps Randy Knippel Dakota County

Map Book

U.S. National Grid

Map Pages

Street Index

Map Legend

Map Index

Map 7456

Street Index Dana Dr.

PDF Map Book

Maps Online (DCGIS)

Map VK75

United States National Grid (USNG) National standard since 2001National standard since 2001 Adopted by federal agenciesAdopted by federal agencies –FEMA, DHS, NGA, USGS Adopted by several statesAdopted by several states –Florida, Missouri, North Carolina, others –Minnesota (March 25, 2009) Military Grid Referencing SystemMilitary Grid Referencing System –Metric system

Why? Multiple gridsMultiple grids –Needed one for everyone Need efficient location referencingNeed efficient location referencing Need interoperabilityNeed interoperability –Across jurisdictions –Local, state, federal, military

What about Lat / Long? Not intuitiveNot intuitive –Degrees, minutes, seconds Several formatsSeveral formats –DMS, DMS.sss, DM.mmm, D.ddd –Longitude + / - + / - West / eastWest / east Increases left to rightIncreases left to right

What about Lat / Long? How big is a degree?How big is a degree? –It 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 Designation 6 x 8 Degrees

100 Km Squares

10 Km Squares USNG:15T VK 75

1 Km Squares

Map 7456 (15T VK 74 56)

U.S. National Grid

Three Components 18SUJ SUJ SUJ SUJ

Map VK

(15T VK ) Map 7456 (15T VK 74 56)

Grid Zone Designation (GZD)

100,000 Meter Square

Truncating

Truncating 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

Scalable National Regional Local

Precision and Truncation 18SUJ SUJ –18S UJ meter precision, full USNG designation1 meter precision, full USNG designation –UJ2306 Assume GZD (18S)Assume GZD (18S) UJ – 100,000 m precision (100 km square)UJ – 100,000 m precision (100 km square) – 1000 m precision (1 km square)23 06 – 1000 m precision (1 km square) – m precision10 m precision Assume GZD and 100 km squareAssume GZD and 100 km square

Key Resources Critical Infrastructure Vulnerable Population

14TPS PS

National Spatial Data Infrastructure (NSDI) Cooperative Agreement Program (CAP) Category 5: Building data stewardshipCategory 5: Building data stewardship –Schools –Hospitals / clinics –Police stations –Fire stations

Tying It All Together Put USNG on maps!Put USNG on maps! Define standard map productsDefine standard map products –Seamless across jurisdictions (?) Include critical assets / key resourcesInclude critical assets / key resources –Structures Create supporting documentsCreate supporting documents TrainingTraining

The Romer Scale

Examples – VK75 VK75 What is at 15T VK ?What is at 15T VK ? –Burnsville City Hall

Examples What is at 15T VK ?What is at 15T VK ? – small building

Examples What is at 15T VK ?What is at 15T VK ? –Building

Examples Find 15T VK ?Find 15T VK ? –Building

Examples What map book pages cover Burnsville Center (35W – 35E interchange)?What map book pages cover Burnsville Center (35W – 35E interchange)? –7654 –7754

Examples - Mapbook Mapbook What is the USNG 100m square for 3309 Dana Dr.?What is the USNG 100m square for 3309 Dana Dr.? –15T VK Find 3309 Dana Dr. on VK75Find 3309 Dana Dr. on VK75

Examples What is at 15T VK ?What is at 15T VK ? –Acorn Park

Examples What is the USNG 100m square for 3801 Azalea Pl.?What is the USNG 100m square for 3801 Azalea Pl.? –15T VK

Examples What is at 15T VK ?What is at 15T VK ? –Edward Neill Elementary

Examples What is at 15T VK ?What is at 15T VK ? –Rudy Kraemer Nature Preserve –Trail intersections

Examples Find Morgan Pl.Find Morgan Pl. –15T VK