Getting into GPS

%%p will also give you +/-
%%d will give you the degree symbol

Nate The Surveyor, post: 392807, member: 291 wrote: Thanks Mr Mapman. I quoted your post above over on the Javad Forum. I felt it was nice and concise, and made it easy to wrap my mind around the basic concepts.
What is your practical metadata list, to go on surveys? Ie, the "Rest of it". I'm now including the Epoch date, on my work. Javad has a setting in their units, that allows you to SET the epoch date... which automates this... Your explanation brought this to mind, and makes me want to get ALL the necessary metadata in a row....

Thanks again. Hope you did not mind me copying and pasting it.

Nate

That is what this site is all about. I have learned much from the discussions here and glad I could make a contribution.

I don't need the "Mr." just Mapman (which I would really like to change - but don't know how) 🙂 .

As for the 'meta' data, at my real job, we are required to state: CCS83(NAD83), 1991.35 epoch, NAVD88, grid coords, point scale factor, & optionally HT (Ellipsoid) off the top of my head.

That example is an approximation, not the actual as I first stated. It also amazes me how much So. Cal is moving!

Best

OK, Our Friendly Mapman, Thanks... IF you send a quick email to our fine moderator, Mr. Wendell Harness, he will make you into whatever you want... within reason... of course!!

Here is what I put on the last plat:
Metadata:
The State Plane Coord for the POB is:
N xxx USA ft.
E xxx USA ft.
Theta = xxå¡xx'xx"
This plat is published on local ground coords, having applied the Combined Scale Factor of 88 PPM.
Epoch Date is 2010
NAD 83 Arkansas South Zone.

I am sure you could "tweek" this a bit. Most conneseors of SPC would know what was going on... but being concise, and correct is even better.
Thanks
Nate

Nate The Surveyor, post: 392809, member: 291 wrote: I have found these handy:

ALT + 248 Gives me the degree symbol å¡
Thanks
N[/QUOTE}

Thanks for that tid bit of info, just used it.

Nate The Surveyor, post: 392837, member: 291 wrote: This plat is published on local ground coords, having applied the Combined Scale Factor of 88 PPM.

This statement leaves too much to the imagination for my taste. I like to make an explicit statement about how to convert ground distances to grid or vice versa, e.g. "Distances shown are ground. To convert ground distance to grid distance multiply ground distance by 1.000088."

Thanks Jim.
It took me a bit to figure out ppm.... But after figuring it out, i liked it's brevity. So I know what you mean about figuring it out some folks may not have that done yet.

Nate The Surveyor, post: 393729, member: 291 wrote: Thanks Jim.
It took me a bit to figure out ppm.... But after figuring it out, i liked it's brevity. So I know what you mean about figuring it out some folks may not have that done yet.

The ‰ÛÏppm‰Û thing became a serious (daily) issue for me back in the mid-late 70s when I started working with AGA Geodimeter Models 76 & 78. The AGA-76 could measure 10,000 meters under good conditions, and the AGA-78 could reach out there 15,000 meters (or more).

These instruments had a ‰ÛÏrollover‰Û threshold of 2,000 meters. This meant that a distance of 3,150 meters was displayed as 1,150 meters (and so forth and so on). So you needed to KNOW how many 2,000 meter increments had to be added to the displayed distance, to generate the actual measured distance.

Okay fine...what some folks didn't realize (because they didn't READ the manual), is that when you set the ppm correction (temperature & barometric correction) into the instrument, it ONLY APPLIED this correction to the DISPLAYED distance (1,150 in the example above).

Because of this idiosyncrasy, I always set the ppm correction to zero, and made the correction ‰ÛÏby hand‰Û to the actual distance measured (1,150 + 2,000 meters). When you were out-there 10-15k meters, and the ‰ÛÏppm correction‰Û was say 60ppm, it made a real difference (~2 feet).

Loyal