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Mohammad Salem
  • Kabul
  • Afghanistan
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Mohammad Salem's Discussions

Different in coordinates reading, Leica TS11

Started this discussion. Last reply by J. Anthony Cavell Jun 13. 7 Replies

Hey Gus!I have faced with a problem at site surveying by Leica TS11, no traverse are created but reading change points with 1-4 mm horizontal accuracy the area are about 20Hrs,the problem is when i…Read more →

Subject Tags: the, coordinates, reading, mach, TS11

Does prism type effect Leica TS11 measurement accuracy?

Started this discussion. Last reply by Cory Barnhart Jun 11. 10 Replies

Hey guys I have done a survey 4 months ago, but for accuracy proposes when I repeat it again with tow kinds of prism (in total station menu was selected just mini prism).1 Lieca round prism2 lieca…Read more →

Subject Tags: TS11, measurement, accuracy, lieca, on

How to measure leica ts11 instrument hight?

Started this discussion. Last reply by Carlo Alberto Birocco May 28. 7 Replies

Hi Do any one know which side of the Leica total station ts11 is for measuring the instrument hight, During station setup? Cuz there are different amount when measure from BM under instrument to…Read more →

Subject Tags: TS11, instrument., lieca, of, hight

To fix deference among total station survey and 3D scan survey

Started this discussion. Last reply by José Pimenta Jun 10. 6 Replies

Hi,any way to fix a topographic surveyed map upon a 3D scan survey?I have surveyed a site and the site surveyed by 3D scan as well, so there are deference in the location of objects in the site…Read more →

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J. Anthony Cavell replied to Mohammad Salem's discussion Different in coordinates reading, Leica TS11
"I'm sorry I cannot offer an solution. I cannot find a cause for your problem. I probably would have to witness the situation personally to find the cause. JAC"
Jun 13
Mohammad Salem replied to Mohammad Salem's discussion Different in coordinates reading, Leica TS11
"Dear  J. Anthony Cavell We have installed few points trough the site, shooting other points around from mentioned installed points. "
Jun 12
J. Anthony Cavell replied to Mohammad Salem's discussion Different in coordinates reading, Leica TS11
"Dear Mr. Salem, Are you surveying radially from a single point, shooting other points from one setup? Are you surveying radially from a few points, shooting other points from only a few setups? Or are you running a traverse through the points,…"
Jun 12
Mohammad Salem replied to Mohammad Salem's discussion Different in coordinates reading, Leica TS11
"Dear J. Anthony Cavell  I said we have measured survey control points ones again in the site and in the second round as well we faced this problem, relocation of objects than the first round, during measurement the accuracy in each…"
Jun 11
Cory Barnhart replied to Mohammad Salem's discussion Does prism type effect Leica TS11 measurement accuracy?
"The mini and the regular circle prism should have the same accuracy but the 360 degree prisms are typically 6" or 8" rated so aren't advisable for long traverses"
Jun 11
J. Anthony Cavell replied to Mohammad Salem's discussion Different in coordinates reading, Leica TS11
"Mr. Salem, I'm sorry; I don't understand your meaning. Please explain to me again. JAC"
Jun 11
Mohammad Salem replied to Mohammad Salem's discussion Different in coordinates reading, Leica TS11
"Thanks  J. Anthony Cavell  as you said  measurements, so we have measured twice the control points but in both we faced mass mach location of objects were in the first location that were surveyed first. "
Jun 10
J. Anthony Cavell replied to Mohammad Salem's discussion Different in coordinates reading, Leica TS11
"-The first possibility is that a point was disturbed. -Secondly, check your data to be sure scale factors, projections, and datums are EXACTLY the same. - Check the specs on your prisms and which ones were placed where. - Of course, consider…"
Jun 10
José Pimenta replied to Mohammad Salem's discussion To fix deference among total station survey and 3D scan survey
"You can do some control scans using your control grid. But then you'll have to redo the scan registration including the control scans. Since the scanning task didn't include the control network they are most likely displaced.  I…"
Jun 10
Mohammad Salem posted a discussion

Different in coordinates reading, Leica TS11

Hey Gus!I have faced with a problem at site surveying by Leica TS11, no traverse are created but reading change points with 1-4 mm horizontal accuracy the area are about 20Hrs,the problem is when i come back surveying the site to the start location the objects and change points reading again show about 20-70 cm relocation!!!  I do not know how it happened and the surcease as well how to solve it now???any solution way will be appreciated and welcomed. regards …See More
Jun 10
Mohammad Salem's 2 discussions were featured
Jun 1
Carlo Alberto Birocco replied to Mohammad Salem's discussion How to measure leica ts11 instrument hight?
"Mohammad, the two dots are at the same height when the instrument is good levelled. Otherwise, the rotation axis of the telescope can't be horizontal and both horizontal and vertical angle will be wrong. The slightly (I hope ...) differences…"
May 28
Carlo Alberto Birocco replied to Mohammad Salem's discussion Does prism type effect Leica TS11 measurement accuracy?
"Hi Mohammad! On the prism's mount You can read the modelname. If You are using Leica prism, it may be: Obviously, You must input the proper prism's constant at the beginning of the survey. Otherwise, the distance will be affect by wrong…"
May 28
Mohammad Salem replied to Mohammad Salem's discussion How to measure leica ts11 instrument hight?
"Yeah, but every of them give the deference height, I think one of them should be the correct one.  "
May 28
NAYUM KHAN replied to Mohammad Salem's discussion How to measure leica ts11 instrument hight?
"U have to measure center of the eyepiece frm any suitable side......"
May 28

Seeking Employment
JOHN DANIEL YORK replied to Mohammad Salem's discussion Does prism type effect Leica TS11 measurement accuracy?
"I agree with Grabwell Fundira above. A large prism offset is normally -30mm. It is generally to your advantage to use the same type of equipment when retracing an as built survey. MINI PRISMS ALL HAVE DIFFERENT OFFSETS THAN A LARGER PRISM. YOU MUST…"
May 27

Profile Information

I am here because I am a.
Surveyor
Surveyor Bio:
I have Bsc in Land survey engineering and, I like to improve my knowledge related to Land survey .
Company
AKTC
Location for Member Map
Kabul
Licenses Certifications or Awards
GIS, AutoCAD, AutoCAD Civil3D...
I have experience with the following
GPS, cadastral, topographic, boundary surveys, topographic surveys, GIS
How many years have you been surveying?
3
Most comfortable with the following types of instrumentation
Total Stations, GPS, Surveying Software, Automatic Levels, theodolite, compass

Comment Wall (1 comment)

At 11:36am on November 22, 2017, Allan Pringle said…

Hi Mohammad. Afraid there is no way to bring the two data sets together.

The Garmin Handy is a pretty useful piece of kit, when used as intended, but even with WAAS enabled and differential corrections being applied, can only give +/-10ft accuracy at best.

Afraid will need to revisit the BMs already established with survey grade GPS.

 
 
 

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