Just made me wonder, how do you guys calculate using gons? Do they have to be converted to degrees first or are there separate trig tables for using gons?
What about radians?
But that doesn't answer my question. I understand the relationship between degrees and gons, but how do you calculate using gons.
Do angles have to be converted to degrees?
SIN 30 degrees (0.5) x 100 feet = 50 feet
Hi Vern,
All survey software I know will handle grads, and all decent scientific calculators wiil work with grads. When I look at my hp 35s ... The mode key let me choose from DEG - RAD - GRD. It's one of these settings you're not aware off when you don't need them, I'm sure you'll have similar options on yours,
Christof.
My software has a choice between grads, degrees or radians.
What Christ said.
If you use grads too much, it weeel result in er French accent, mon ami !!!
DOH! I should have known that.
How many times have I been confused by calculations only to find the calculator somehow switched to one of those settings ALL BY ITSELF!
I don't have a calculator
Now what do you do?
Ah ha HA! I talk like Maurice Chavalier!
I don't have a calculator
For an angle less than a quadrant, just multiply the grads (with all the decimal places) by 90 and you get decimal degrees.
I don't have a calculator
Only turn angles in 50 gon increments.
A lot of electronic survey instruments have settings so that you can have angles in degrees (either DMS or decimal degrees) or gons and some even have an option of MIL.
Like Christ said with calculators, it's something we don't think about because we don't use them.
But the one question I still don't see an answer to and I don't know, were there printed trig tables in gons?
[sarcasm]meters, they will use meters[/sarcasm]
So what is the break down? We have the wonderful 60 minute 60 second break.
What are the shortcuts and common uses?
Like:
20" = 0.01/100 (Put a guy 100' away and turn 20", then make him move 0.01')
[sarcasm]I cannot think of any more right now...[/sarcasm]
But I havee to admit that only the landsurveyors use the grads. The math classes for the high schools use the degrees and the radians.
So when an engineer does road design you'll likley find degrees on the plan, unless he has a survey background. Conversions are realy simple *400/360 or *360/400. Our totalstations are always configured for grads.
Chr.
Sure there were tables printed in grads. Instructions were all in French. Lots of old French maps were graduated in grads for Latitude and Longitude. That includes the projection tables for the Laborde Projection tables for Madagascar, an old French Colony. Also for Lebanon and Syria, part of the French Levant after WWI.
Something like Pepé Le Pew, lol
I set it at feet when I first loaded it and never looked back.
😉
I use grads in all my field work because it is so much easier to deal with programatically (no need to convert from DD.MMSS to DD.ddddd, etc). 100 is east, 200 is south, etc. I process my raw field data with programs that i have written, so it saves some steps.
> I use grads in all my field work because it is so much easier to deal with programatically (no need to convert from DD.MMSS to DD.ddddd, etc). 100 is east, 200 is south, etc. I process my raw field data with programs that i have written, so it saves some steps.
Never thought i'd hear a Merican say that. Guess you never have to put any angles down onto legal plans?
(Then again, there can't be many camels ridin' downtown Pittsburgh either)
