Land Surveyor Forum

Replies

• 

  Michael Alan Sanchez April 19, 2010 at 5:48pm

  when you resect there is an option to save point check it.
  then set up backsight like any other survey sideshot/traverse
• 

  Mark Ware February 9, 2010 at 11:49am

  I would add that although re-section is a very powerful tool, it can also be very dangerous. One thing to keep in mind is to think about the geometry of the control you are shooting. Famous watchwords for surveyor's are: "beware the SINE of small angles" . If you have flat angles (near 180°) any error in your control and subsequent adjustments to the measurements to it will be magnified. The best thing to do is try to have near 60°-90° angles between your control points. Also, if you can shoot a 3rd or even a 4th control point for your re-section (don't forget to shoot the back sight and all other shots both direct and reverse), you will add a great deal of redundancy to your resection and errors will show up quickly when you review the residuals. ALWAYS check and re-zero your back sight and check other known points before continuing your survey. Freshen up the leveling on the instrument and re-check your back sight often and especially at the end of your set-up before picking up.
  
  I hope this helps,
  
  Mark
  • 

    Jeremiah > Mark Ware March 15, 2010 at 2:11pm

    Thanks for all the help guys. I really appreciate it. I have another job coming up that I'll need to make multiple set ups on. I bet some more questions pop up from it. Jeremiah
• 

  Kathleen (Kate) Burnham-Evans November 18, 2009 at 12:18pm

  Hey Hows it going, Number one, your circular should always be 00-00-00. After you have shot a point that you are going to occupy go to backsite set up and solve it. I remember it prompts for something but we just lied to it and said yes. One thing I have learned from many an old surveyor is "its all about the checks" check into something that you have shot from another point or shoot a point shot earlier and inverse or stakeout and make sure it checks. I have had many a gunner put and angle in the circular set up and spent hours re-entering data. The cool thing about the recon is you can view the raw data and see where you screwed up and you can not delete the job. I love the Recon, never could get the solar observation program to work. Let me know if you have any other questions, the book sucked. Another trick is you can start your job at pt 100, with a northing of 5000.00 and easting 5000.00 store it. Then go to point in direction screen and creat point 101 using a bearing or azimuth and a distance of 1000.00, store it pick a random point to zero on, house pitch, street sign, ect. Then shoot what ever you need to. once you have shot at least 2 known points you can than Translate and then Rotate your job, just remember to move All your points. Gosh I loved that Recon. Hope I did not confuse you, sorry if I did. Kate
  • 

    Robert S. McClintock Sr. RPLS > Kathleen (Kate) Burnham-Evans December 18, 2009 at 1:03pm

    Hey There! What Kate is saying there is pretty much correct. Remember, when you are doing a resection, you are only solving your "unknown" instrument station's (occupy point) local coordinates (N, E, Z) based upon the KNOWN coordinates of your resection points.
    Best results are achieved by repetition, so I recommend you set the routine up for at least 2 sets to average from. (The more the better, usually) Then, before you accept the results of the resection, make sure that the solutions precision ratio is within the standards of accuracy for your particular project. Concurring with Kate again, then set up/solve your backsight (00-00-00), check the backsight distance (ALWAYS) and then go to the stakeout screen, pick a few established points and "stake them out". If they don't check, something is not cool and you better find out what before continuing. BTW: The RECON is awesome but the NOMAD is way better!!!!
    • 

      Chris Root > Robert S. McClintock Sr. RPLS December 20, 2009 at 5:27pm

      Just a note ... it's not the data collector, it's the software :) Survey Pro has been around since the early to mid 90's and is an industry standard. It's used in many data collectors today, which I'd like to add the Ranger is much better than the Recon due to having an external keypad to type instead of having to bring up the little digital keypad on the Recon. But that's my preference due to having used an external keyboard for probably 15 years :) Trimble Survey Controller software is also very nice, though it lacks some of the calculation ability that Survey Pro has, but it is a much better construction based software for roads and such.
      
      I would also like to double and triple agree with the checking method, always check into something else before doing anything.