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

2. “You Are Here” Signs
And Brochure Maps

4. Avenza Maps

5. Emergency Location Markers

6. Emergency Location Markers
USNGAPP.ORG

7. 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

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

10. Avenza Maps

13. GeoCam
Mobile Apps
GridNav
MyMGRS

19. 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° °
USNG (13/8)
15T VK

20. 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