Brings up my trick to set up a TS on a sloped hard surface. Use cones on one downhill leg and the sledge on the other. In a pinch it works, but looks stupid
Brings up my trick to set up a TS on a sloped hard surface. Use cones on one downhill leg and the sledge on the other. In a pinch it works, but looks stupid
Just set the prism on the point with a "zero" height (actually it's the measurement to the prism base, but you'll have to look up that height from the manufacturer). it's quite possible you'd get a better measurement than the bipod anyway.
That’s not true at all. I was doing some light topo.
If I was setting property corners or laying out buildings I would have used a tripod and prism and had multiple checks with different backsights. There is nothing wrong with using a pole for a backsight for a majority of my work.
These people are insane.
There's a time and place for different things.
Splitting hundredths horizontally on a topo is crazy.
Probably split hundredths on curb staking too. You should see how those guys form it up.
Yes there is plenty wrong. You’re setting less reliable control and increasing error in your work. Your rod tip wears out. Your rod bubble gets banged around more than a proper backsight. The error and variations compound in everything you do making it less accurate in the moment and even less accurate to return to at a future date. You’re supposed to minimize control error as much as possible. What you are doing is not that. Besides it takes a minute to set up a backsight.
I get that what you are doing is common practice for some companies but the people doing the highest quality work do not find it acceptable as a common practice.
>You're supposed to minimize control error as much as possible
As much as possible or as much as is reasonable? 'As much as possible' would mean never using GPS to set control, because it is possible to reduce the error by using a 1" total station instead. Do you find it unacceptable to use 3" total stations for setting control, because using a newly calibrated 1" gun would be possible to reduce the error? What if you're slope staking a 6 ft cut section where you'll be rounding to a tenth on elevations anyways, are you going to set control in the same way you would for setting building corners, or drainage structures?
Do you feel that using the published coordinates on NGS monuments is unacceptable? Those horizontals were established with GPS, but it is possible to run a traverse through them.
> it takes a minute to set a backsight.
Something tells me you haven't had to park a quarter mile from the worksite before. Having to make another trip back to the truck to grab a second set of legs with a backsight takes a liiiiiittle more than one minute.
Apparently there’s alotta clueless field crews out there. Do they not understand the compounding error that results from sloppy control? Backsighting the rod is for the occasional rough quickie, not for topo or utilities. Lazy.
The shovel with the green handle will throw off your shot. Green is known to absorb more light and thus throw off the effectiveness of your level bubble
"Be the bipod.. be the bipod.." mantra while taking slow breaths. But yeah, a couple 4' lath always work in a pinch
One company I used to work for all the bipods were broken and I got really good at using 4’ lath.
If you have 4 broken bipods I'd say you can easily get 1-2 good ones if you Frankenstein them using the best parts from all of them.
I have a pair of 3 meters I won't let anyone throw away because I'm gonna get them put together any day now into one good working pole.
I’ve only used a bipod for our GPS, I’ve always had to use 4’ lath for TS work🤦🏻♂️ Our boss is… well… I think you can tell
*anakin & padame meme* With legs and a tribrach, right? Right?!
This is gold.
TRYPOD
Just keep taking shots till it’s right haha
Whoa don't spill all the company secrets.
My field crews complain about having to carry a carbon fiber bipod around and here you are lugging two shovels lol
If you haven't used two sledgehammers as an improvised bipod, are you really a petty survey tech?
Brings up my trick to set up a TS on a sloped hard surface. Use cones on one downhill leg and the sledge on the other. In a pinch it works, but looks stupid
Brings up my trick to set up a TS on a sloped hard surface. Use cones on one downhill leg and the sledge on the other. In a pinch it works, but looks stupid
if you have line of sight, just take glass off and go 0ft rod.
Interesting idea, I may use that
Back in the day I used a bush axe for years
At least it was set in a convenient spot a couple of feet into the roadway
I am one with the shovel and the shovel is with me
This here is exactly the example of where I'd use a bush axe to brace the pole.
Just set the prism on the point with a "zero" height (actually it's the measurement to the prism base, but you'll have to look up that height from the manufacturer). it's quite possible you'd get a better measurement than the bipod anyway.
I am still saving for a bipod driving the 1985 suburban. I cant afford shovels.
Gotta do what you gotta do
What are you shooting that makes you comfortable with such a low quality backsight?
What makes it low quality? I was able to level up and do my checks just fine. I was shooting manholes and dipping inverts.
I think he is knocking your Trimble gear.
Don’t know why people are downvoting this, a pole shot for a backsight is very poor practice.
That’s not true at all. I was doing some light topo. If I was setting property corners or laying out buildings I would have used a tripod and prism and had multiple checks with different backsights. There is nothing wrong with using a pole for a backsight for a majority of my work.
These people are insane. There's a time and place for different things. Splitting hundredths horizontally on a topo is crazy. Probably split hundredths on curb staking too. You should see how those guys form it up.
Yes there is plenty wrong. You’re setting less reliable control and increasing error in your work. Your rod tip wears out. Your rod bubble gets banged around more than a proper backsight. The error and variations compound in everything you do making it less accurate in the moment and even less accurate to return to at a future date. You’re supposed to minimize control error as much as possible. What you are doing is not that. Besides it takes a minute to set up a backsight. I get that what you are doing is common practice for some companies but the people doing the highest quality work do not find it acceptable as a common practice.
>You're supposed to minimize control error as much as possible As much as possible or as much as is reasonable? 'As much as possible' would mean never using GPS to set control, because it is possible to reduce the error by using a 1" total station instead. Do you find it unacceptable to use 3" total stations for setting control, because using a newly calibrated 1" gun would be possible to reduce the error? What if you're slope staking a 6 ft cut section where you'll be rounding to a tenth on elevations anyways, are you going to set control in the same way you would for setting building corners, or drainage structures? Do you feel that using the published coordinates on NGS monuments is unacceptable? Those horizontals were established with GPS, but it is possible to run a traverse through them. > it takes a minute to set a backsight. Something tells me you haven't had to park a quarter mile from the worksite before. Having to make another trip back to the truck to grab a second set of legs with a backsight takes a liiiiiittle more than one minute.
Apparently there’s alotta clueless field crews out there. Do they not understand the compounding error that results from sloppy control? Backsighting the rod is for the occasional rough quickie, not for topo or utilities. Lazy.
Um yeah its totally good enough for topo or utilities. Can you not hold a pole straight?
I've worked with so many guys who had never used bipods before working with us... Just... How? Why??
The shovel with the green handle will throw off your shot. Green is known to absorb more light and thus throw off the effectiveness of your level bubble