North

Summarize Topic

Strictly Surveying

Last Post by holy-cow 13 years ago

5 Posts

5 Users

0 Reactions

458 Views

RSS

browja50

(@browja50)

Posts: 207

Free

Topic starter

Translate ▼

I really enjoyed explaining to my client the difference between true north geodetic north grid north magnetic north and record north. The most fun I Have had in a long time. I guess I really am a survey geek.

Posted : October 7, 2013 7:37 pm

R L (Larry) Lawrence Jr

(@r-l-larry-lawrence-jr-2-2)

Posts: 10

Free

Translate ▼

I understand grid north, geodetic north, magnetic north, and record north, but what is true north?

Posted : October 7, 2013 8:51 pm

Equivocator

(@equivocator)

Posts: 146

Free

Translate ▼

I was under the impression that True north is Geodetic north. Wiki however tells me different:
Geodetic true north also differs very slightly from Astronomical true north (typically by a few arc seconds) because the local gravity may not point at the exact rotational axis of the earth.

Posted : October 7, 2013 11:44 pm

MightyMoe

(@mightymoe)

Posts: 10688

Member P&R, Founder

Translate ▼

Grid north? How many of those are there?

Posted : October 8, 2013 4:57 am

holy-cow

(@holy-cow)

Posts: 26020

Member P&R, Founder

Translate ▼

West

Saw a plat the other day that had been drawn with the top of the page being West, whatever that is. I'm sure the clients loved it because it probably came closer to matching their view of things. The front of the site was at the bottom of the page.

Posted : October 8, 2013 5:27 am