Grid north

Steve Billig's Avatar

Steve Billig

17 Jan, 2017 07:29 PM

Is there a way to display or otherwise indicate grid north on a printed map. That would allow a more accurate declination adjustment when using UTM grids.

  1. Support Staff 1 Posted by matt on 18 Jan, 2017 11:38 PM

    matt's Avatar

    Not presently, but it's on the list.

  2. matt closed this discussion on 18 Jan, 2017 11:38 PM.

  3. Steve Billig re-opened this discussion on 18 Jan, 2017 11:59 PM

  4. 2 Posted by Steve Billig on 18 Jan, 2017 11:59 PM

    Steve Billig's Avatar

    Matt,

    Thanks. Are you aware of any online calculators that provide Grid North deviation based on coordinates or zip code?

    Love your site.

    Steve

  5. Support Staff 3 Posted by matt on 20 Jan, 2017 06:54 AM

    matt's Avatar

    Not that I know of, although I'm sure one is out there for coordinates.

    UTM zones are 6 degrees wide, starting at -180, to the US boundaries are -120,-114, etc. Grid north matches true north at the center of the zone (-123,-117,etc), and in the northern hemisphere points W when you're W of the center and E when you're E of the center, maxing out at approximately 1.8 degrees. So at -120.1, it's at 1.8 degrees E, and at -119.9 it's at 1.8 degrees W. You can rule-of-thumb it from there.

  6. matt closed this discussion on 20 Jan, 2017 06:54 AM.

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