Not exactly the same, but a lot of debris builds up behind the tainter gates on the navigation locks that we monitor. I asked why they don't remove th...

Here is some aerial footage, jump ahead to about 6:00 minutes into the video...[MEDIA=youtube]K28mHWrV3AM[/MEDIA]

Conrad, post: 413560, member: 6642 wrote: Hi John, I'm not sure yours is the best policy, but perhaps it is depending on the capability of the service...

My recent experiences...I was locating some corners in the woods. Western PA winter, no leaves on but wooded area of deciduous trees. Trimble R10, VRS...

Reminds me of a level crew I saw in India when I was working there...7 men...2 rodmen, an umbrella man for the instrument, instrument man, recorder, p...

Blasting?

Once again I bring up the issue of WHAT you are monitoring. I don't think a porch slab is stable to begin with. I would only consider something like a...

Just describing the famous typical England weather!Yes, I agree that there are times I wish I had an old school level when the Dini decides it doesn't...

Here is a great explanation of the method by Shawn Billings that was published in the American Surveyor:

Yea, the ideal day for leveling is totally overcast, dreary, no wind.

Nor the low sun...if the scope is pointing towards the sun low in the sky, it needs to be shielded. Holding a field book over it or even a styrofoam c...

The S6 I have was something like $36K back in 2006, plus another $4K or so for the data collector, if I recall correctly. I do not just use it for ins...

what Richard describes is a dual prism rod, we use it all the time to measure to places where we cannot get a rod plumb over a point. Trimble Access h...

I wish I had a new S9! I am using a high precision S6 (1", 1 mm + 1 ppm) that I bought in 2006, the thing just plain works. I have told the shop that ...

I buy power cables and antenna cable from western states cable . We almost always power the units with an external battery when doing static work, whi...

Shelby H. Griggs PLS, post: 413346, member: 335 wrote: I am guessing it is no coincidence that Atlas and National are both in Indiana about 6 miles ap...

Yes, it specs at 0.3 mm/km, but reality in the field is sometimes a bit different. We use 3 m rods with struts, turning pins or plates, balance our sh...

I don't think there is a significant difference in results attainable under normal conditions with a good digital level (we use a Dini12) versus an N3...

Shelby H. Griggs PLS, post: 413346, member: 335 wrote: I am guessing it is no coincidence that Atlas and National are both in Indiana about 6 miles ap...