That happened to me before when I had setup a profile in OPUS, it used the value in the profile. Not that it doesn't like 0.000, but it warns you in c...

If I was out there I would be glad to help out with my total station if needed (or GPS). Maybe someone on the board here will volunteer....

Data transfer (free download from trimble)

I take it you do not have a total station? Before the advent of CORS/HARN, the only control available for GPS were triangulation stations. Here in the...

I do a lot of federal work (probably 75% to 90%, it vries year to year). As long as it is not boundary (i.e photo control, geodetic control, monument ...

JOHN NOLTON, post: 455285, member: 225 wrote: Mark to Mark distance has been known to be the best way to keep records of distance for a long time.Mr. ...

Arc to chord corrections can be applied, but they are only significant over long distances. I don't remember the cutoff (currently out of the office),...

When leveling, we have two methods to accurately level to vertical marks. We have a 50 cm invar strip that is easy to hold on a knife blade placed in ...

You can reduce an observed distance (slant range, instrument to prism) to mark to mark using either zenith distances (vertical angles) or delta height...

Actually, the reduction to the ellipsoid ("sea level") on NAD 27 in California was problematic....this map prepared in the 70's shows the bias present...

and

The way I do it is I setup a GPS nearby on a regular tripod with tribrach. I know the height of the ARP above the tribrach plate (0.033 m using a stan...

Shelby: sounds like what is happening here, stop and restart. And Gavin, thanks for your insight as well. I had done some searching, and found various...

I always use an external battery at the base (with internal as a backup). R10 will email me when it switches from external to internal

With those distances you need VRS software, not just connect to nearest base,to get good results. $$$If you just want to provide single base connectiv...

I thought about the 2G thing, but SUPPOSEDLY AT&T turned off all 2G. But that is a possibility. I was hoping someone else has experienced this. I ...

I was working on a USGS project in Idaho many years ago. Wehad to get control at the corners of the quadrangles, so some areas were pretty remote. I w...

A related question...does anyone else "test" their batteries at intervals? We run sessions outside the office every couple of months with all of the n...

In the old days a matchpack would do the trick, but who carries matchpacks anymore? That is a good suggestion, if I put some black electrical tape aro...