Randy Knippel GIS Manager Dakota County

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Presentation transcript:

Randy Knippel GIS Manager Dakota County Maps, Apps, and GPS Randy Knippel GIS Manager Dakota County

“You Are Here” Signs And Brochure Maps

Avenza Maps

Emergency Location Markers

Emergency Location Markers USNGAPP.ORG

U. S. National Grid National standard since 2001 National Search and Rescue Committee Adopted by several states Minnesota (March 25, 2009) Military Grid Referencing System (MGRS) Based on UTM coordinates

UTM: 488,540 4,958,980 Then up to 589 Read right to 885

Avenza Maps

www.usngcenter.org

GeoCam Mobile Apps GridNav MyMGRS

What About Lat/Long? Not intuitive Several formats Degrees, minutes, seconds Several formats DMS, DM.mmm, D.ddd Longitude + / - West / east Increases right to left Eagan Fire Station 2 DMS (24) 44°49’58.1”N 93°08’15.0”W DM.MMM (22) 44°49.968’N 93°08.251’W D.DDD (15) 44.832°-93.137° USNG (13/8) 15T VK 8913 6438

What About Lat/Long? How big is a degree? It varies 69 miles at the equator Longitude gets smaller toward poles 50 miles in Dakota County Distance calculations are difficult USNG is in meters all the time