DC MapJames: thanks for the DC neighborhoods map. My daughter is moving back to the US in July and will be moving to Columbia Heights area. She came h...

11 to 13 sounds like GPS/Glonass. 7 or so sounds like GPS only.

Thanks for that detailed response, Evan. I think it is interesting. Unfortunately I don't know anyone in the Game Commission, although I believe they ...

I agree with what Norman said. You must make sure the control is stable, otherwise you will not have valid data. Sometimes it needs to be set hierarch...

Turning it aroundOK, so what if I was the private adjoiner? And I said yes, you can swim in the stream. I think I have as much right to say that as th...

This may sound strange, but we use tribrachs WITHOUT an optical plummet. They are standard "Trimble" tribrachs (made in Hungary), and have a large hol...

In PA, there are two types of navigable streams: navigable by fact and navigable by law. Very few are actually navigable by fact (generally the Delawa...

It was a very tough site...thick underbrush, briars (what we call jaggerz in western PA), and many many piles of slag (large and small) dumped all ove...

Stephen: to correct a common misconception...cooling towers are also used at other types of steam generating plants, , i.e. coal fired. If there is a ...

Here is what I use for deformation work when the points are flush with the surface (usually a punch mark in a brass bolt):Seco monopodIt has several a...

Yswami: For example...I setup on 200, BS 100, and FS 300. Then shoot a bunch of topo. I decide to check the BS, I call it 100. Or if I take another sh...

After reading all of this, I seem to be an anomaly. I always call a point by its only name (or number), whether shooting it as a BS, FS, a check point...

I have seen brook trout in that stream. That makes sense. I couldn't think of any reason why they would care, but that does make sense. The access to ...

Yea, here in PA you can't do ANYTHING (hardly) on SGL, except hunt. And, the game commission agents have gestapo like powers to stop and search your v...

That is a similar price to what i paid 8 years ago for a high accuracy S6, full robotic. Maybe a few $1000 more. Or maybe my memory is faulty. So mayb...

The MS50 looks like a great instrument. What is the price range for one of those in the US?

A good trick is to use plastic rebar caps. They usually fit snugly over the rod, and have a small hole to put the rod in. And they can be removed for ...

Of course I was kidding about the steal part...just a saying. I was on Oahu and Maui working in 2003, and Oahu again in 2005. I really liked everythin...

I don't see anything really wrong with saying "WGS84", except you need a position to go with it, at least a longitude (but they never come alone, so t...