Greetings all. I'm using LEICA DNA 03 for leveling. When processing data of a friend of mine, I noticed that couple of the recorded distance exceeded 0.7 mile, and as you know this will be affecting the "allowed misclousre" because its formula includes the root square of the summation of loop distance multiplies by a number, which means the allowed misclosure will be bigger, and this might tell me that my loop is pass when comparing the computed misclosure. Then I went over the manual of the insturment to see what is the longest distance it can read, and I found that the range of electronic measurement is around 360 ft which cofused me based on the result of my freind.
So could you please give me some clarification about this issue (like what should be the maximum sight distance, etc.., and if someone has the insturment it would be great if he can mention the good settings.
Thank you all for you time and help & wish you all the best
Are you saying that one shot was around 3,700 feet? Or are you saying that was an accumulated distance of a number of measurements? I can't imagine one shot that long.??
The answers you seek are in the manual, but can be difficult to extract as Leica documentation reads like a some bizarre foreign tongue that uses all the same words as English but in as stuffy and obtuse manners as possible.
It has been a while but the way I have used em in the past has been to keep sight distances under 150 feet, some reasonable limitation on amount of visible rod, 0.1 mil per turn, adjusting per turn, not by distance. Running the program "line leveling" only recording starting values and closing values/delta in the book and exporting the field book format and the resultant elev formats.
Use a turtle, a fair amount of the work I did was in the dark and the Nedo Illuminated rod was quite helpful for that and other light conditions as well. The level does not like speckled conditions, which can be frustrating if working under tree canopy in the summer.
I am sure that others here can respond with better info, but figured I would keep it moving.
Yeah Tom. I found couple of shots over 3168 feet, which got me worried.
Thank you so much for your post, and yes I read the manual but I'm a little be confused but as you said the others may have more to say. Thank you again.
Mr. Mattsur,
I believe that the data is lying to you. I never, ever, ever got anything over 350'. There is no way that thing recognized the bar code at that distance. Something is adrift with out a paddle or rudder!!! I don't know what the solution to your problem is but I can be sure that the DNA 03 did not read the rod at 3200'.
I'm in agreement with Mr. Tompkins. I don't know how far the level will read; but I just can't imagine it reading several thousand feet. I am wondering if there is a missing decimal point or something. That would make much more sense. I can't imagine a field crew even trying to get that far.
Set Precision to 11
Most dig levels go to 10, ours goes to 11. 😉
send me your '.gsi' data file. i am curious to see it
Mattsur,
It is physically impossible for the digital level to read anything beyond say 500 feet. The distance you are looking at of 0.7 mile is a total loop distance in a report or the total distance along a loop next to BS and FS readings. The maximum distance the instrument will measure to the code on a rod actually depends on the length o f the rod being used. Yes there are multiple types of rods and they are built to different lengths. So lets go with the tallest rod which is 3 meters - the level is specified to measure the rod up to a distance of 110 meters (360 feet)
Let me know the following and we can go from there...
1. When you exported the data from the DNA level did you export in GSI format, .LEV format, or was there a custom format file being used. The format file would probably generate a text file that was brought into say Excel.
2. Is the value for the 0.7 mile shot displayed in Leica GEO Office (LGO). If you exported the level data in GSI or .LEV you probably used LGO.
3. Are you using some other software to look at the level data other than LGO?
The issue has got to be something simple in the data transfer.