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GPS Turn by Turn Instructions

This is a discussion on GPS Turn by Turn Instructions within the MapPoint Desktop Discussion forums, part of the Map Forums category; I am witting a car navigation application using MapPoints GPS. I am able to use MapPoints built in GPS functionality ...

  1. #1
    jonp54 is offline Junior Member White Belt
    Join Date
    Jul 2007
    Posts
    8

    GPS Turn by Turn Instructions

    I am witting a car navigation application using MapPoints GPS. I am able to use MapPoints built in GPS functionality but not their turn-by-turn instructions. Using Paul Larson's API as an example i use windows messages to enable the GPS and driving guidance but the guidance always says "Proceed to Route". Has anyone been able to receive the built in turn by turn instructions from mapPoint? Also, i have noticed that when i open MapPoint via code, the "GPS Pane" button in the RoutePlanner pane disappears. But it is there when i open MapPoint normally and the turn by turn works. Could this be connected?

    Also does any one know how accurate the GetLocation(..) is when the altitude 1 (at its lowest)? I am assuming it has to be greater than .5 miles.

    Any advice would help

    Thanks,
    Jon

  2. #2
    Wilfried is offline Senior Member Black Belt
    Join Date
    Nov 2004
    Location
    Belgium
    Posts
    2,433

    Re: GPS Turn by Turn Instructions

    Hi,

    See my answer on another post today (calculating automatically)

  3. #3
    jonp54 is offline Junior Member White Belt
    Join Date
    Jul 2007
    Posts
    8

    Re: GPS Turn by Turn Instructions

    I was not able to figure out why the turn by turn directions dont work but, i was able to find a solution.
    If anyone else was having this problem dont initialize MapPoint via CreateInstance() /CreateObject().
    If you instead use createProcess() to start MapPoint and then use GetActiveObject(clsid) to get the application pointer you then don't have to use the GPS_ON template any more and the Driving Guidance works.

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