Post pics of difficult shots

[Adam]

View attachment 7113

Where are you at? That could easily be the North Carolina mountains. I love it!

 

[Sdrake14]

Oops..sorry Adam, California Lost Coast. Just west of Dinsmore along Hwy36 and Van Dusen river. I went to college in Cleveland, Tn. And yes it is almost as rugged and beautiful there but the trees are small there. Our smallest are the Doug firs seen in the photos......the crews here are still trying to figure out how we do it. We half about a third of Five mile stretch slopestake and the grade checkers have tried in vain three times to set up their RTK system with a fail. (Pssst...Topcon)

 

[Sdrake14]

I do brag on the Triumph system whenever I can but these boys up here are so used to NOT it still unbelievable to them. Kinda like Jesus. Who incidentally was around the same time as some of the trees up here...Merry Christmas!

 

[Nate The Surveyor]

This thread "Pics of difficult shots" has more replies than any other, on this forum.
I think that's an indicator, of one of the strengths of the Javad system.
Nate

 

[Patrick Garner]

An understatement, Nate.

 

[Sdrake14]

Thank you for your inquiry.
How the Javad LS "catches" if its got the wrong initilization, is if the coord "walks" too far, during a observation.
So, short observations can yield bad shots, under canopy. It needs time, to sort out the truth.
There are some "work arounds", for topo. Distance to last, if turned on, always shows the dist, and elev diff, to the last shot.
This allows you to pace, and estimate elev diff.

However, there is an axiom.
"The harder the shot, the more prone to error".
And, some times of the day, it will be done, fully verified, in 3 min. At othet times of thr day, that particular shot may need 20 min. Or 30 min.
The sat geometry, and the environment you are working, are variables. At all times.
The Javad system has the most horsepower available today, at any price.
So, overall, it will be the most effecient, of anything today.
However, everybody is improving, and you may find happiness with a different system. I dont know everything.
But if the Javad is not the best in the woods, I'd be curious to know what is!
Think it through, and choose wisely.

Sign me, a happy Javad customer,

Nate

Nate you are soooo correct that the LS has the most HP and IS the best in the woods. Daily I obtain positions with this marvel that are repeatable and I know there is no other machine that could get them. Yes at times it takes minor patience but compared to traversing through the mountains hoping for a closure the wait still has me ahead of it. I am ruined. I do not think I could even work for a company now that would force me to stoop to using Trimble, Leica or Topcon.

 

[Sdrake14]

The slope stakes up the hill in the woods set by Triumph LS....and repeatable.
These took patience....but are good.

 

[Sdrake14]

 

[Sdrake14]

King of the hill.

 

[Sdrake14]

 

[Sdrake14]

15 foot offset? No sweat! (except the scramble up the 1:1 part)

 

[Duane Frymire]

I little different take. In a cave of thorn apples but the adjacent southern exposure field was enough to get a good position.

 

[Jon Gramm]

Taken on a hike to find a stone corner, and posting a property line.

 

[Bill Eggers]

Not a difficult shot, just a photo of a sturdy support we found to use for the radio.

 

[Matthew D. Sibole]

It took about 52 minutes to get this shot. No other receiver I know of would have gotten an RTK shot on this. I have not DPOS’ed it yet to see how well it agrees but I had nine repeated epochs over 52 minutes.

 

[Steve Douty]

It took about 52 minutes to get this shot. No other receiver I know of would have gotten an RTK shot on this. I have not DPOS’ed it yet to see how well it agrees but I had nine repeated epochs over 52 minutes.

Please report your DPOS results. Inquiring minds want to know!

 

[Matthew D. Sibole]

DPOS did return a fixed solution on this point but it did not agree with the 52 min fixed RTK solution. Typically I would have stayed and reshot this corner. In this case I was following a recorded subdivision plat and the distances checked within 0.02' from the platted distances so I knew I had good information.

 

[Steve Douty]

Thanks Matt. I have no issues with your thought process. I would like to see the screens of the two different results just for fun and games. I am starting to feel that GPS/RTK/PPK is as much an art as it is a science. The more we can see, the closer our art comes to defendable science. I think the ability to review and study shots like this one strengthens my campaign for an office emulator.

 

[Matt Johnson]

I would like to see the raw data files. I’m sure Alexey probably wants to look at them as well.

 

[Nate The Surveyor]

It's sort of a tangent, but I recently did a shot underneath an old R/R trestle. I had a corner to set. The trestle was made around 1901. It was hot creosote treated. It was around 20' wide at the base. And around 30' tall. I am so used to the Javad giving right answers, that I assumed this would be the same.
Nope.
So far, this finally flummoxed it. Of 4 shots, (20 to 30 min ea) only one is correct, and it was rtk. All the ppk is wrong. The other rtk shots never had 3 epochs that agreed, over 180" of time.
I did not take a pic. Should have.
I consider rtk stronger than ppk, in the real bad stuff.
I wound up doing offset shots, and setting the corner. The final cor agreed with the one good rtk shot.
So far, this has been the MOST challenging environment that I have found.
Nate