I am combining RTK vectors with Total station in Survnet, I am wanting to reduce the total station work to Grid. In the set up options I do not see where it will reduce the total station file by a scale factor. But there is an option to select State Grid but I am not sure it is used to reduce the raw data total station work , but only the GPS vectors. In the standard Carlson Raw data editor it gives you the option to reduce it by a grid scale factor . So I am assuming that if you want to use Survnet combined with GPS and total station you must enter the scale factor at the data collector when you start your instrument work ?
I have only limited experience with SurvNet but I think that you would not enter any scale factor when combining GPS vectors and Terrestrial data. At least, that is certainly how you do it in StarNet.
If no scale factor for Raw total Station data, then the program must reduce the total station data to grid . Not a big concern on this project due to size but I need to know ....
> If no scale factor for Raw total Station data, then the program must reduce the total station data to grid .
That's true.
It absolutely reduces TS measurements to grid based on the algorithms and formulas found in James Stem's NGS Manual, "State Plane Coordinate System of 1983". For elevation factor it uses the unadjusted elevations of the field collected points. If the raw data is lacking HI's or other info needed to compute elevations you have the option to enter a project elevation.
Donnie Stallings
Well, what I said above is true if you are using the 2d/1d model. If you are combining total station and GPS vectors you are using the 3D model, which adjusts and models the data, GPS and total station in a common 3d system. The most recent edition of Ghillani's book gives an explanation and the formulas used in the 3d model.
Though I currently have no formal connection to Carlson or Carlson SurvNet, I am always glad to help fellow NC surveyors. Feel free to shoot me an email or call 919-469-8336 if you have any questions on SurvNet
I'm a little confused on your question. Are you using GPS vectors or are you just using RTK points, or vectors derived from RTK?. Either way the program should be handling reduction to grid correctly.
Donnie
Let me expand the question , I am using RTK vectors , and total station raw data . I would like to mix them together . With the above situation the program will only work if you select the NC projection and 3D model . I started to wonder if the raw data for the Total Station work was being reduced to Grid distance to match the GPS vectors . I wanted to make sure I was apples to apples .
And thanks for the reply .
The best way to work thru this is for you to send me your raw data. My email is [email protected], or call me at 919-469-8336, or better yet send me the raw data then give me a call. I am in the office today and will be glad to help you. What format is your data in? Is your TS raw data in .rw5 format? What format is your GPS vectors? I use an Ashtech receiver and always convert my GPS vectors into StarNet's ASCII format as that is a simple straight-forward format that is easy to work with. Are your GPS vectors part of the .RW5 file. That is an option that the current SurvCE supports. If I'm doing RTK work my tendency is to just bring in the RTK points, not vectors. I have not yet seen the advantage of using GPS vectors when using RTK. The bottomn line is I need more details on your data and project to give detailed help. The quickest and easiest way to work thru this is to send me the data.
Where are you in NC? I'm in the Raleigh/Cary area.
you got mail