Mohammad Salem
  • Kabul
  • Afghanistan
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Mohammad Salem's Discussions

Civil 3D 2017 do not show up the real surface as it's on the site!

Started this discussion. Last reply by Cory Barnhart Jan 27. 4 Replies

Hy guys!as you see below civil 3d 2017 does not show up the real surface or figure of ground, based on the data(points of that site) here the blue line represent a ditch (that have about 30CM depth…Read more →

Subject Tags: real, the, figure, of, ground!

Change Coordinates during survey

Started this discussion. Last reply by Juan morales Dec 3, 2017. 12 Replies

Hi, every body I am using Garmin handy GPS with low accuracy to establish BMs but there is needed high accuracy for this survey, but i am not able for now to have a high accuracy GPS due to time…Read more →

Subject Tags: coordinates, survey, Change

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Kim Noblitt favorited Mohammad Salem's discussion Civil 3D 2017 do not show up the real surface as it's on the site!
Feb 2
Cory Barnhart replied to Mohammad Salem's discussion Civil 3D 2017 do not show up the real surface as it's on the site!
"Enable yout tin (triangle) view and manipulate those so that none cross your breaklines, the tin has to run along all the breaklines"
Jan 27
Kevin D. Allen replied to Mohammad Salem's discussion Civil 3D 2017 do not show up the real surface as it's on the site!
"The previous commenets are as mine - got to "Surface Properties"  then "Edit Surfce Style"  then pick the Display tab and make triabgles visible.  You will see some triangles cross your channel sideways - go back…"
Jan 23
Mohammad Salem's discussion was featured

Civil 3D 2017 do not show up the real surface as it's on the site!

Hy guys!as you see below civil 3d 2017 does not show up the real surface or figure of ground, based on the data(points of that site) here the blue line represent a ditch (that have about 30CM depth and the tow sites are concreted level surface), so the contours not appear as it shouldwhat is your suggestion? I have used break line commands, added new points manually even 1Mx1M but the issue not corrected!Regards.  …See More
Jan 23
Constantin BALAN replied to Mohammad Salem's discussion Civil 3D 2017 do not show up the real surface as it's on the site!
"see triangles"
Jan 23
Constantin BALAN replied to Mohammad Salem's discussion Civil 3D 2017 do not show up the real surface as it's on the site!
"define surface as contour and triangles and you`ll see where you need to ad brake line if needed, define a boundary or if you need more points . the triangles will define the surface between 2 measured points , wider the measured points, less…"
Jan 23
Mohammad Salem posted a discussion

Civil 3D 2017 do not show up the real surface as it's on the site!

Hy guys!as you see below civil 3d 2017 does not show up the real surface or figure of ground, based on the data(points of that site) here the blue line represent a ditch (that have about 30CM depth and the tow sites are concreted level surface), so the contours not appear as it shouldwhat is your suggestion? I have used break line commands, added new points manually even 1Mx1M but the issue not corrected!Regards.  …See More
Jan 23
Juan morales replied to Mohammad Salem's discussion Change Coordinates during survey
"of course, you can do it, but  for example if you use a Helmert transformation the residuals will be out away of scale "
Dec 3, 2017
Mohammad Salem replied to Mohammad Salem's discussion Change Coordinates during survey
"Thanks friends for your suggestions but... my question is that is there a way if you survey a land site with incorrect (ex. x100,y200,z300) coordinates and then observe only BMs with high accuracy coordinate and change all surveyed data with new…"
Dec 3, 2017
Ahmed Mohamed replied to Mohammad Salem's discussion Change Coordinates during survey
"If your question is about coordinate transformation between the Garmin-observed coordinate set and the survey-grade set by applying some sort of shift and/or rotation, the answer is not possible. The noise level (inaccuracy) of the Garmin-observed…"
Nov 29, 2017
Mohammad Salem's discussion was featured

Change Coordinates during survey

Hi, every body I am using Garmin handy GPS with low accuracy to establish BMs but there is needed high accuracy for this survey, but i am not able for now to have a high accuracy GPS due to time shortage, and there is plane to buy a high accuracy GPS after some days later (that time we will do some of our survey on the site), so is there a way to change my topographic surveyed coordinates with new measured coordinates?Regards.See More
Nov 28, 2017
MUKACHANA TAFARA BOTHWELL replied to Mohammad Salem's discussion Change Coordinates during survey
"you will have to redo the survey since if you use the ones you took with the garmins the coordinates will still be inaccurate as per the required "
Nov 28, 2017
Nicolas replied to Mohammad Salem's discussion Change Coordinates during survey
"Like most replied here I wouldn't even attempt to collect any info with the low grade GPS. The issue being is your low accuracy device will not have relative info within itself. So the issue being is when you localize into your BM's with…"
Nov 27, 2017
Benjamin J Everett replied to Mohammad Salem's discussion Change Coordinates during survey
"Nav and Mapping grade GPS is out of the question. It’s an order of accuracy issue. You can’t maintain the required tolerance for the site with that equipment. Do what you may, but you’ll be doing the work over again with Survey…"
Nov 24, 2017
Juan morales replied to Mohammad Salem's discussion Change Coordinates during survey
"Almost 5 meters in position and 10 meters in height. Not good"
Nov 23, 2017
Mohammad Salem replied to Mohammad Salem's discussion Change Coordinates during survey
"If any one knows how to change it, it would be great if he/she fully describe the method(s), I know there is a way in liscad software but in closed triangulation and i am not sure for an open one."
Nov 23, 2017

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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