GPS help

Discussion in 'AutoCAD' started by BillZ, Aug 5, 2003.

  1. BillZ

    BillZ Guest

    Can anyone help me? I am runnig an evaluation version of GPS2CAD software that is supposed to translate a text file from gps format to AutoCAD r14 point text file.
    (I cannot find the user manual that they say is in the docs section.)
    After I convert the file to cad this is what it looks like.
    001,707348.22800,5164441.42100,46T,N,0.0,0,26
    002,707351.44700,5164459.33000,46T,N,0.0,0,27
    003,707352.90200,5164461.60500,46T,N,0.0,0,28
    004,707344.36300,5164464.64900,46T,N,0.0,0,29
    005,707347.50300,5164462.53200,46T,N,0.0,0,30

    Supposed to be northing and easting.
    I have no civil engineer background.
    How can I layout these points in acad?

    Bill
     
    BillZ, Aug 5, 2003
    #1
  2. BillZ

    Murph Guest

    Bill, It looks like the format that I use somewhat.



    001 would be the point number (first record in the file)



    707348.22800 is the X coordinate



    5164441.42100 is the Y coordinate



    46T & N are most liley the coordinate system used by the GPS collector



    the last numbers(0.0,0,26 ) look like the attribute values for that point



    I can sent you a copy of my lsp that I use to insert a block to ya if it helps.



     



    Murph



     



     



    "BillZ" <> wrote in message news:...

    Can anyone help me? I am runnig an evaluation version of GPS2CAD software that is supposed to translate a text file from gps format to AutoCAD r14 point text file.
    (I cannot find the user manual that they say is in the docs section.)
    After I convert the file to cad this is what it looks like.
    001,707348.22800,5164441.42100,46T,N,0.0,0,26
    002,707351.44700,5164459.33000,46T,N,0.0,0,27
    003,707352.90200,5164461.60500,46T,N,0.0,0,28
    004,707344.36300,5164464.64900,46T,N,0.0,0,29
    005,707347.50300,5164462.53200,46T,N,0.0,0,30

    Supposed to be northing and easting.
    I have no civil engineer background.
    How can I layout these points in acad?

    Bill
     
    Murph, Aug 5, 2003
    #2
  3. BillZ

    Murph Guest

    Yup Been doing it for years captureing static points and bringing them in. Working on a way to do it realtime if I can get some files size down.



    There are some 3rd party stuff out there that will do it already. Lets you walk around with a GPS unit and it draws lines in CAD as you walk out a boundry or drive a road. Once wire-less gets lower price and stable it will be even cooler.. :)



     



    Murph



     



    "Devin" <> wrote in message news:...



    Didn't know you could go gps->cad.  Kinda cool.



     



    Devin
     
    Murph, Aug 5, 2003
    #3
  4. BillZ

    BillZ Guest

    Okay, but when I use these points as XY my points end up only a couple of inches apart. Are these scaled down somehow?

    Bill
     
    BillZ, Aug 5, 2003
    #4
  5. Units can be whatever you "declare". If your unit display is decimal, call
    the unit "a decimal foot". ;-)

    --
    R. Robert Bell, MCSE
    www.AcadX.com


    | Okay, but when I use these points as XY my points end up only a couple of
    inches apart. Are these scaled down somehow?
    | Bill
    |
     
    R. Robert Bell, Aug 5, 2003
    #5
  6. BillZ

    Murph Guest

    They are in Lat,Lon units One unit there is one degree of the latitude/longitude at that loction If you have the gps unit software see if you can save them in another coordniate system (ie StatePlane for your area) that will convert them into one unit = one foot.  You might be able to find a convertor on the web if you look long and hard enough. AutoCAD Map has it built in. If you want to I can convert them so you can see what I mean.



     



    Murph



     



    "BillZ" <> wrote in message news:...

    Okay, but when I use these points as XY my points end up only a couple of inches apart. Are these scaled down somehow?

    Bill
     
    Murph, Aug 5, 2003
    #6
  7. BillZ

    BillZ Guest

    That would be great.
    Then I could see for myself and show my boss what this is.

    I'll attach the txt file.

    Thanks

    Bill
     
    BillZ, Aug 5, 2003
    #7
  8. LOL!


    | A toe :)
    |
    | Murph
    |
    | "R. Robert Bell" <> wrote in message ...
    | >> the unit "a decimal foot". ;-)
    | >
    |
    |
    |
     
    R. Robert Bell, Aug 5, 2003
    #8
  9. BillZ

    Paul Turvill Guest

    Huh? Latitude is limited to 90 deg, and longitude is limited to 180 deg.; I
    think the original post was correct: those numbers look like
    northing/easting data (units_north_of_datum, units_east_of_datum) to me.
    ___

    latitude/longitude at that loction
     
    Paul Turvill, Aug 5, 2003
    #9
  10. You can go "anywhere" with a gps. <g>

    --
    Ken Alexander
    Acad2000
    Windows2000 Prof.

    "We can't solve problems by using the same kind
    of thinking we used when we created them."
    --Albert Einstein
     
    Ken Alexander, Aug 5, 2003
    #10
  11. BillZ

    Bob Basques Guest

    What does a before (conversion) string look like?

    bobb
     
    Bob Basques, Aug 5, 2003
    #11
  12. BillZ

    Paul Turvill Guest

    Now those *do* look like latitude & longitude. I'd put it in the vicinity of
    Perham or Vergas, MN.
    ___
     
    Paul Turvill, Aug 5, 2003
    #12
  13. BillZ

    BillZ Guest

    Paul,

    You got that right. Kinda scary! 8-||

    Big brother could be watching.



    Bill
     
    BillZ, Aug 6, 2003
    #13
  14. BillZ

    BillZ Guest

    Got it. &gt;&gt; My quess is those points are in the UTM coordinate system. (Universal Transverse Mercator) &lt;&lt;&lt; Yes, That's the only one they support so far.
    Thanks in bundles.
    &nbsp;&nbsp;

    Bill
     
    BillZ, Aug 6, 2003
    #14
  15. BillZ

    BillZ Guest

    Funny thing.
    If I insert the points in the unconverted file and rotate them 90d and mirror them from verticle. The point pattern is the same as the Allout_LL.DXF.
    The Allot_TnPlane.dxf points are a way far away from each other. Seems to measure in thousands of miles.

    Bill
     
    BillZ, Aug 6, 2003
    #15
  16. BillZ

    BillZ Guest

    Murph,
    Another q.
    What is the resolution on these points?
    Does a GPS from the satellite only get "so close"?
    They seem to be "in the general area" but at the same time are almost ransom to the way the guy that made them says they should be. I'm thinking it's as close as it gets.

    Bill
     
    BillZ, Aug 6, 2003
    #16
  17. BillZ

    Murph Guest

    It all depends on a number of things. The time of the day, placement of the satelittes, what satellites and number of them. Most GPS recievers will come with-in 3 meters to start with. The professional units are with-in cm. There is also what we call corrected points, that's where the gps points are compared to points taken from a known location. Depending on what area of the counrty you might be in there is a thing called "becon" that sents a signal to the gps unit and does real-time correction with the points as they are gathered.



    &nbsp;



    Murph



    &nbsp;



    &nbsp;



    "BillZ" &lt;&gt; wrote in message news:...

    Murph,
    Another q.
    What is the resolution on these points?
    Does a GPS from the satellite only get "so close"?
    They seem to be "in the general area" but at the same time are almost ransom to the way the guy that made them says they should be. I'm thinking it's as close as it gets.

    Bill
     
    Murph, Aug 6, 2003
    #17
  18. BillZ

    Murph Guest

    Yes, that's the different in using the coordinate systems and datums. Really get confusing when mappers share dwgs with others in different parts of the world and on different platforms. I only know enough to get by in my job theres all kinds of learning to do in this area.



    The TnPlane is for Tennessee State plane system, the orig (0,0) is the south western corner of the state and each unit is one foot.



    It should give you a good idea on&nbsp;requiring the data/points be in some type of coordinates before you work with them.



    &nbsp;



    Murph



    &nbsp;



    &nbsp;



    "BillZ" &lt;&gt; wrote in message news:...

    Funny thing.
    If I insert the points in the unconverted file and rotate them 90d and mirror them from verticle. The point pattern is the same as the Allout_LL.DXF.
    The Allot_TnPlane.dxf points are a way far away from each other. Seems to measure in thousands of miles.

    Bill
     
    Murph, Aug 6, 2003
    #18
  19. BillZ

    Jason Wilder Guest

    Ah, so many variables, there's also the option if you have 2 or more units that you can set one unit as the beacon and do relative distancing from the stationary unit.&nbsp; At least I was aware this was possible with the Trimble equipment.&nbsp; This setup would even allow multiple fielders to situate of that stationary unit and was good for something like a 5 mile radius in clear zone (if i remember correctly).



    "Murph" &lt;&gt; wrote in message news:...



    It all depends on a number of things. The time of the day, placement of the satelittes, what satellites and number of them. Most GPS recievers will come with-in 3 meters to start with. The professional units are with-in cm. There is also what we call corrected points, that's where the gps points are compared to points taken from a known location. Depending on what area of the counrty you might be in there is a thing called "becon" that sents a signal to the gps unit and does real-time correction with the points as they are gathered.



    &nbsp;



    Murph



    &nbsp;



    &nbsp;



    "BillZ" &lt;&gt; wrote in message news:...

    Murph,
    Another q.
    What is the resolution on these points?
    Does a GPS from the satellite only get "so close"?
    They seem to be "in the general area" but at the same time are almost ransom to the way the guy that made them says they should be. I'm thinking it's as close as it gets.

    Bill
     
    Jason Wilder, Aug 6, 2003
    #19
  20. BillZ

    Murph Guest

    Anytime.



    &nbsp;



    Murph



    &nbsp;



    "BillZ" &lt;&gt; wrote in message news:...

    &lt;&lt;&lt; Most GPS recievers will come with-in 3 meters to start with. &gt;&gt;&gt;

    Great when you're dropping bombs I guess.

    Thanks for all the info.



    :^)

    Bill
     
    Murph, Aug 6, 2003
    #20
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