Coordinates: Definitions and Overview

Terrain Navigator Pro can display coordinates in many ways. You may choose whichever coordinate system best suits your purposes. Changing this preferences setting converts all of Terrain Navigator Pro's displays and dialogs to that coordinate system. The coordinate setting can be changed at any time during your Terrain Navigator Pro session - all conversions will take place automatically.

To change your coordinate preferences, open the File menu and choose Preferences, Coordinate Display. You can specify a Primary coordinate display and an (optional) Alternate Coordinate Display.



Degrees Minutes Seconds (Dº M' S"):
This is the default coordinate system in Terrain Navigator Pro and is the most commonly used. This Latitude / Longitude Coordinate system displays the location in Degrees, Minutes, and Seconds. For example, in Deg. Min. Sec. the location of MyTopo's main office would look like this:
45º 46' 50.42" N 108º 30' 14.69" W

Degrees Minutes (Dº M.M'):
Like Deg. Min. Sec., this shows the location in terms of Latitude / Longitude,
except that the seconds are replaced by fractional digits (to the right of the decimal point).

MyTopo's Main Office Location:
45º 46.8404' N 108º 30.2449' W

Degrees (D.Dº):
Also known as Decimal Degrees, this coordinate system represents the
location as one, long decimal number. The digits to the left of the decimal point
indicate the degree, the digits to the right indicate the minutes and seconds.

MyTopo's Main Office Location:
45.7806741º N 108.5040825º W

Universal Transverse Mercator (UTM):
Often used in the military and in conjunction with GPS units, the UTM coordinate system is completely different from Latitude / Longitude. UTM uses an imaginary grid of equidistant, perpendicular lines, to divide the globe into 60 zones. Position is indicated in meters within a zone. This makes UTM the preferred system for ground navigation.

MyTopo's Main Office Location:
12 06 94 025 E 50 72 709 N

Military Grid Reference System (MGRS):
A system which uses a standard-scaled grid square, based on a point of origin on a map projection of the Earth's surface in an accurate and consistent manner to permit either position referencing or the computation of direction and distance between grid positions.

Terrain Navigator Pro allows you to specify 1 meter, 10 meter, 100 meter, and 1 kilometer MGRS grid intervals. Grid positions are calculated based on the MGRS-3 specification.

MyTopo's Main Office Location:
12TXR9402572709 (1 Meter Grid)

United States National Grid (USNG):
The USNG system is basically identical to MGRS. The exception being that MGRS and USNG use a different notation when the NAD27 datum is specified. Terrain Navigator Pro allows you to specify 1 meter, 10 meter, 100 meter, and 1 kilometer USNG grid intervals.

MyTopo's Main Office Location:
12TXR9402572709 (1 Meter Grid)

State Plane Coordinate System:
Coordinate systems established by the U.S. Coast and Geodetic Survey (now the National Ocean Survey), usually one for each State, for use in defining positions of points in terms of plane (x,y) rectangular coordinates. These coordinates may be given in feet or meters.

MyTopo's Main Office Location:
559718 ft. N., 2222501 ft. E. (measurement in feet)
170602 m. N., 677419 m. E. (measurement in meters)

Township/Range System (TRS):
Uses a rectangular grid system based on a principal meridian and a base line and divided into townships, sections and parcels. This is also known as PLSS (Public Land Survey System.)
MyTopo's Main Office Location:
NW NE Sec 03 T001S R026E (Parcel)

General Questions (FAQs) and How-To Answers

  1. Getting Started with Terrain Navigator Pro
  2. Coordinates: Definitions and Overview
  3. What are Layers? What's the difference between markers, routes, tracks, etc.?
  4. Organizing Layers with Projects
  5. Managing Projects, Splitting the Default Project, Project Synchronization to TNP Mobile/Web, and Other Tips
  6. How do I obtain an area measurement?
  7. Street Layer. Can I turn it off? What about updates/inaccuracies? (And other common questions)
  8. What is a MapPack and how do I use it to show photos when TNP has no Internet Connection?
  9. Transferring Project Layers to a new PC
  10. How to Disable Registration and Subscription Renewal Notices
  11. Red Triangles on the maps. Can I toggle them off? (And other common questions)
  12. Apple Mac OS and Terrain Navigator Pro
  13. Adding Land Use, Boundaries, and other GIS Information to TNP
  14. AutoCAD - Exporting maps from Terrain Navigator Pro
  15. Using Existing Markers to Create a Route in TNP
  16. Creating Routes via Bearing/Distance (metes and bounds) - by Azimuth or Quadrant bearings.
  17. Adding Waypoints within a Route; Appending Routes Together
  18. My Markers, Routes, etc., are way too big (or too small.) What's going on?
  19. Attaching Maps to an Email
  20. Recording 3-D Video Clips
  21. Keyboard Shortcuts
  22. Error Loading Polygon or Error Loading GeoPin when TNP starts.
  23. TNP System Requirements
  24. Video and Printer Driver Updates: How to apply them to improve Terrain Navigator
  25. Repairing a Corrupt Map Engine (black maps, not responding, etc.)
  26. Google Earth doesn't interface properly with TNP

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