🌐 Show Forums for All Locations
Show the latest social shares
USA Surveying Forums
United States Surveyors
- Arizona
- Alabama
- Alaska
- Arkansas
- California
- Connecticut
- Delaware
- Florida
- Georgia
- Hawaii
- Illinois
- Indiana
- Iowa
- Kansas
- Kentucky
- Maine
- Maryland
- Massachusetts
- Michigan
- Minnesota
- Missouri
- Montana
- Nebraska
- Nevada
- New Hampshire
- New York
- North Carolina
- North Dakota
- New Mexico
- Oklahoma
- Ohio
- Oregon
- Pennsylvania
- Rhode Island
- South Carolina
- South Dakota
- Texas
- Utah
- Vermont
- Virginia
- Washington
- Wyoming
- Wisconsin
- West Virginia
- USA Surveying Events
Asia Surveying Forums
Africa Surveying Forums
Middle East Surveying Forums
European Surveying Forums
South American Surveying Forums
Oceania Surveying Forums
Oceania Land Surveyors
Surveying Equipment Support Forums
Choose Your Equipment Type
Search Survey Photos
Search Surveying Photos by Tag
Add Posts, Surveying Photos, Videos and Articles to the Surveyor Community
Add Stuff to Community
Replies
If you know the radius of the pipes already you could get the centre coords of the pipes by measuring the angle from one side of the pipe to the other side of the pipe, I.e if the instrument is set up and coordinated jot down the bearing of one side of the pipe and then turn to the other side of the pipe and jot down the bearing of the other side of the pipe. One bearing subtract the other bearing will give you the angle. Divide the angle by two and add the answer to the first bearing and this will give you the centre point on the pipe to turn off to. You could now either set your prism constant at the pipe radius to get the centre point of the pipes instantly or you could work them out later if you coordinate the centre point on the surface face of the pipe. Just use Brg and dist and add the pipe radius to your distance to get centre point of pipe. (Unscrew the mini prism from the mount to hold against the pipe, or use reflector-less or retro targets to do the job.)
Just to add to my last post you do need to know the thickness of steel of the pipe for centre point accuracy if it's not included in the radius.
Greetings,
At the risk of sounding self serving, I do many surveys that involve round tanks and pipes for Sewer Treatment plants. I have written software for Windows PC's that visually computes all survey functions. One of the routines is to calculate the radius point of 3 different points which are supposed to be on the same circumference. You might try it. www.dc-survey-software.com I have had discussions with several surveyors from Australia and while my software works great, they are accustomed to azimuth bearings and a reversal of Northing/Easting to Easting/Northing in printouts etc. But it works with meters, feet, chains as long as the project does not need to switch back and forth.
Hope this helps.
Marcus