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Explain GPS to me. — Parallax Forums

Explain GPS to me.

jdoleckijdolecki Posts: 726
edited 2011-09-15 14:04 in General Discussion
Could someone explain or tell me were to find info.

I dont understand how to navigate between 2 GPS points.

If my bot is at one point and I want to go to another point how do I do that?

thanks

Comments

  • Ray0665Ray0665 Posts: 231
    edited 2011-09-15 08:50
    Her is some interesting reading from DPRG.
    While it talks about a specific challenge the article includes all the theory and math you might need.

    http://www.geology.smu.edu/~dpa-www/robo/challenge/index.html

    Have fun
  • ercoerco Posts: 20,261
    edited 2011-09-15 08:52
    jdolecki wrote: »
    If my bot is at one point and I want to go to another point how do I do that? thanks

    Good one... google robomagellan and start searching
  • tonyp12tonyp12 Posts: 1,951
    edited 2011-09-15 08:54
    Unless your bot has a digital compass, I guess it need to start driving straight forward and check if it's going at an angle to destination and start steering.
  • RDL2004RDL2004 Posts: 2,554
    edited 2011-09-15 09:15
    Bear in mind that the average GPS receiver has positional accuracy measured in meters. So without a specialized or military GPS, a bot will be able to navigate from one end of a street to the other, but will be totally lost in the backyard.
  • Duane DegnDuane Degn Posts: 10,588
    edited 2011-09-15 11:42
    I'm working on a GPS project myself. I started with GPS Float Demo. I modified it to use Lonesock's F32 which saves a cog. I also use a four port serial object that save a second cog.

    The price of fewer cogs came at messier code. I had to move many of the child objects into the parent object so I could use a single serial driver.

    GPS Float has methods for computing course and distance. As other's have said, you'll need additional navigational aids besides GPS to keep your robot on course.

    I plan on starting a thread today about my project (GPS Pedometer).

    Duane
  • WBA ConsultingWBA Consulting Posts: 2,936
    edited 2011-09-15 14:04
    Not sure if it will help at all, but I posted some Handheld GPS code that does some "great circle" math for distance and direction finding.
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