Level Curves from GPS Data

Discussion in 'General GPS Discussion' started by Diego Mitre, Mar 6, 2018.

  1. Diego Mitre

    Diego Mitre

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    Hey guys,
    I'm working on designing an irrigation system for my farm and height differences are crucial for the calculations.
    I would love your suggestions on first what GPS to purchase it doesn't need to be milimetrical but should have a fair amount of precision without digging a hole in my pocket.
    Secondly I need a suggestion o what software I could purchase to make the curves (Contour Map) and export them to google earth and/or autocad. The more user friendly the better. I currently have autoCAD LT 2015 and I don't really know how to use it.

    I recently heard of trackmaker, does any of you have any experience with tis software? suggestions?
     
    Diego Mitre, Mar 6, 2018
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  2. Diego Mitre

    Nuvi-Nebie Moderator

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    I'm not sure what level of accuracy you are looking for, but I don't think GPS is going to be useful, you have to remember that any accuracy figures you may be given for a GPS don't apply to altitude, ( height above sea level), because all GPS devices are roughly twice as inaccurate on altitude as they are for Latitude / Longitude figures. It is possible to use GPS to generate contour lines, but you would really need a professional surveying GPS, which will cost a few thousand dollars

    In order to overcome the inaccuracies of hand held GPSs, some units also have an additional way to determin altitude e.g. an in-built barometric altimeter, your best bet is to purchase one if these GPSs, e.g. the Garmin GPSmap 62s and the GPSmap64s have this feature
     
    Nuvi-Nebie, Mar 6, 2018
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  3. Diego Mitre

    Diego Mitre

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    @
    Yes the idea is to get a GPS with an in-built barometric altimeter. I'm hoping the gps can detect 1 meter differences. Any ideas on what software I can use.
     
    Diego Mitre, Mar 7, 2018
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  4. Diego Mitre

    Nuvi-Nebie Moderator

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    The contour lines could be drawn as Tracks on the free to download Garmin Basecamp and then exported as a *.GPX file or a *.KML file for Google Earth
     
    Nuvi-Nebie, Mar 8, 2018
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