hello everyone! I'm Daniel an undergraduate of surveying and geoinformatics, i have an urgent assignment questions to submit real soon, i dunno if fellow surveyors in the house can assist me with the answers. i will be so grateful...the questions goes thus:
1. Give examples of observations on one zero and two zeros and explain the importance of observing Face Left(FL) & Face Right(FR).
2. Discuss the principle of traverse under (i) open controlled traverse (ii) controlled loop traverse (iii) explain adjustment of measured angle under (a) correction to individual angle (b) correction to bearing.
3. Discuss the principle adopted for adjustment of coordinates during traverse computation.
4. Explain the steps procedures for a layout survey.
thanks.
Are you asking us to do the assignment for you? Have you been given no course material to get these answers from?
I doubt anyone here is going to write your essays for you, but they would probably be willing to answer more specific questions about details that are unclear. You're going to have to make good start on them, though.
The instructor must have given these questions after assigning some readings and/or giving lectures on the topics. Do you have a textbook that discusses these topics?
Totalsurv, post: 357820, member: 8202 wrote: Are you asking us to do the assignment for you? Have you been given no course material to get these answers from?
unfortunately i have no materials for these, if you can recommend a book or a material i read on this,so i can answer them myself, i will appreciate.
Bill93, post: 357821, member: 87 wrote: I doubt anyone here is going to write your essays for you, but they would probably be willing to answer more specific questions about details that are unclear. You're going to have to make good start on them, though.
The instructor must have given these questions after assigning some readings and/or giving lectures on the topics. Do you have a textbook that discusses these topics?
he gave lectures on them quite alright but he didn't assign a material to us for further reading...and we can't really apprehend from his lectures...a recommended book or material on this will help..thanks
Daniel,
Blatantly coming on here and posting your questions verbatim from the assignment is in poor taste. You will also note that the responding posts are concise and use correct spelling and punctuation. If you want to address professionals, act professional.
Now, welcome to surveyorconnect, you have stumbled upon a group with centuries worth of experience, and the questions you have asked are easily answerable by anyone here. We are happy to clear up what you are unclear on, but aren't about to do your assignments for you.
So let's start again. What are you not understanding from the assignment?
Your not going to have Surveyor Connect with you when you sit down for the FS.
http://lmgtfy.com/?q=surveying+traverse .
Now that wasn't so difficult eh?
"1. Give examples of observations on one zero and two zeros..."
This requires further explanation, dozens of surveying texts, 42 surveying credits, 15 years as a PLS and I never heard those terms used.
And where exactly is this disaster of survey education occurring?
Paul in PA
In question 1, we are discussing doubled angles. It's probably a pedantic professor, with little field experience, and a boatload of books. In the "theory and practice" equation, our dear prof, probably is a little short on practice.
Or, these questions were interpolated from a co-ed class lecture, with a gorgeous female in close proximity, after a wonderfull outing, The night before, with some exquisite beverage, that was overly abundant.
Maybe another classmate copied these from the chalkboard, in shorthand...
And just a few words were inadvertently left out.
More and more profs. Are resorting to cryptic wording, due to the extensive use of the internet, to find direct answers, with intelligent explanations, that allow the students to pass, without knowing the material.
All the above questions could be re-written, greatly simplifying the assignment.
Tell us a bit about what school this is from, and such...
We are surveyors, and we run often run into situations, where there are many answers, and some are more correct than others. Some that are being applied, are very poor answers.
So, when we see a student, trying for a good score, with reduced knowledge of the subject, well, some of our sentiments kick in...it does not work good in real life either.
Some of us spend an inordinate amount of time figuring out what kind of bogus semi-bogus plat just came across our desk.
So, just for the record, a tour through a few rabbit trails can be a normal part of modern surveying.
Try searching this forum (top right corner of page), there are hundreds of answers to each of your questions tucked away right here.
Paul in PA, post: 357872, member: 236 wrote:
And where exactly is this disaster of survey education occurring?
Paul in PA
LOL
Paul in PA, post: 357872, member: 236 wrote:
And where exactly is this disaster of survey education occurring?
Paul in PA
Googling "dinzel_flash" leads on to believe that it is occurring in Nigeria
I recall some Nigerians at NJIT. I sure hope it is not there.
Paul in PA
Paul in PA, post: 357886, member: 236 wrote: I recall some Nigerians at NJIT. I sure hope it is not there.
Paul in PA
Did you go to NJIT?
I'd be shocked if this came from there, although there are some new faculty since I attended.
Do Nigerians bomb? I think they are the ones that do dell tech support, while riding stationary bicycles, with alternators, to power their laptop...
Dinzel_flash, post: 357818, member: 11259 wrote: hello everyone! I'm Daniel an undergraduate of surveying and geoinformatics, i have an urgent assignment questions to submit real soon, i dunno if fellow surveyors in the house can assist me with the answers. i will be so grateful...the questions goes thus:
1. Give examples of observations on one zero and two zeros and explain the importance of observing Face Left(FL) & Face Right(FR).
2. Discuss the principle of traverse under (i) open controlled traverse (ii) controlled loop traverse (iii) explain adjustment of measured angle under (a) correction to individual angle (b) correction to bearing.
3. Discuss the principle adopted for adjustment of coordinates during traverse computation.
4. Explain the steps procedures for a layout survey.thanks.
The way I understand Question 1 is that it is "zeroing" the instrument on a "backsight". Zeroing it once and turning one angle and then "holding" the angle, either with a lower motion or other method, and flipping the barrel, will allow for a "second zero" to give two angles to "mean". In this method, which we still use, any mis-leveling in the instrument is immediately caught. However, if all instruments are level and in adjustment, it is not needed due to dual compensators. The idea behind FL and FR is similar and old. In the olden days, if you "turned right", you "read right" (one face) and if you "turned left", you "read left". This was needed due to the inaccuracy in the plate, typically with a transit. As late as the 2b, salesmen would still tell you, even though it only read angle right, to turn left past the target, then turn right to the target. These instruments only had single axis compensators. With dual axis compesators, it's, once again, irrelevant.
In Question Two, they are asking about different techniques for controlling traverses. One could take off of a pair of geodetic monuments, and run to another set of geodetic monuments, and balance the angles and distances based on the misclosure. One could also make a sun/star shot for an azimuth, run uncorrected for a distance and make another sun/star shot and adjust the azimuths. This is (i). In (ii) it is taking off of two points and closing back into the same two points. Then using a number of methods to balance the angles and distances, it can be achieved and is typically internal and specific to the traverse. Both methods are used equally at my shop depending on the project. The idea behind (iii) (a & b) is that in the first one, you may be running azimuths and closing into azimuth pairs while the internal traverse loop uses interior or exterior angles (N-2*180) or (N+2*180) respectively, and you know what the polygon angles should be, and what you came up with and balance the angles based on the difference.
In Question Three, there are as many answers as questions. In using Least Square Adjustments (LSA) one would determine a weighting for each observations and evaluate the error ellipses for each, typically using the specs provided in the instrument, i.e. at a 95%, if the instrument is a 5" gun with 5mm +5ppm, and you turned an angle to a point 800 feet away, an error ellipse would have a semi-major axis perpendicular to the line of sight and a semi-minor axis in line with the line of sight that would have an error ellipse perpendicular of 0.039' on each side and the other side of the ellipse at 0.04' on each side. These are using empirical values. Once balances the coordinates are then assigned to latitude and departures from the starting point and a Compass/Transit/Crandall's rule will adjust the traverse in different ways, determine latitude and departures and the assign coordinates based on those.
Question 4 I can't answer as the surveying jargon varies from locale to locale. My idea of a layout survey is construction staking but it may be you setting property corners. This is simple subtending of bearings from computed coordinates and distances derived from same to lay the angle and distance out and place an object for some reason or another.
Hope this helps. It probably doesn't though.
In the context of 1-3, number 4 is the inverse of 1-3. It is taking raw, coordinates, and performing stakeout. Generating, field angles and distances, from Coordinates.
N
Kris Morgan, post: 357893, member: 29 wrote: The way I understand Question 1 is that it is "zeroing" the instrument on a "backsight". Zeroing it once and turning one angle and then "holding" the angle, either with a lower motion or other method, and flipping the barrel, will allow for a "second zero" to give two angles to "mean". In this method, which we still use, any mis-leveling in the instrument is immediately caught. However, if all instruments are level and in adjustment, it is not needed due to dual compensators. The idea behind FL and FR is similar and old. In the olden days, if you "turned right", you "read right" (one face) and if you "turned left", you "read left". This was needed due to the inaccuracy in the plate, typically with a transit. As late as the 2b, salesmen would still tell you, even though it only read angle right, to turn left past the target, then turn right to the target. These instruments only had single axis compensators. With dual axis compesators, it's, once again, irrelevant.
In Question Two, they are asking about different techniques for controlling traverses. One could take off of a pair of geodetic monuments, and run to another set of geodetic monuments, and balance the angles and distances based on the misclosure. One could also make a sun/star shot for an azimuth, run uncorrected for a distance and make another sun/star shot and adjust the azimuths. This is (i). In (ii) it is taking off of two points and closing back into the same two points. Then using a number of methods to balance the angles and distances, it can be achieved and is typically internal and specific to the traverse. Both methods are used equally at my shop depending on the project. The idea behind (iii) (a & b) is that in the first one, you may be running azimuths and closing into azimuth pairs while the internal traverse loop uses interior or exterior angles (N-2*180) or (N+2*180) respectively, and you know what the polygon angles should be, and what you came up with and balance the angles based on the difference.
In Question Three, there are as many answers as questions. In using Least Square Adjustments (LSA) one would determine a weighting for each observations and evaluate the error ellipses for each, typically using the specs provided in the instrument, i.e. at a 95%, if the instrument is a 5" gun with 5mm +5ppm, and you turned an angle to a point 800 feet away, an error ellipse would have a semi-major axis perpendicular to the line of sight and a semi-minor axis in line with the line of sight that would have an error ellipse perpendicular of 0.039' on each side and the other side of the ellipse at 0.04' on each side. These are using empirical values. Once balances the coordinates are then assigned to latitude and departures from the starting point and a Compass/Transit/Crandall's rule will adjust the traverse in different ways, determine latitude and departures and the assign coordinates based on those.
Question 4 I can't answer as the surveying jargon varies from locale to locale. My idea of a layout survey is construction staking but it may be you setting property corners. This is simple subtending of bearings from computed coordinates and distances derived from same to lay the angle and distance out and place an object for some reason or another.
Hope this helps. It probably doesn't though.
thanks!!! i'm most grateful
I can't help but wonder of the OP is not from the United States. If he is, he needs to work on his English. If he is not, then he deserves a little slack.
