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Thread: Ditching Mappoint.

  1. #11
    Maximum Bitrate skippy76's Avatar
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    GPS accuracy:

    Ok, regarding the accuracy of GPS. Up until 3.5 years ago, the accuracy of a non military system was based upon the current state of the US.

    Military systems prior to 3.5 years ago would be 'keyed'. This is a crypto graphic key that would be fed into a military used GPS system. These keys would only be available to countries within NATO. The keys would enable the GPS receiver to decypher the encrypted part of the GPS signal, which would contain the current timeING offset. The receiver can then use this offset when triangulating the result.

    So, around 3.5 years ago, the US government stopped applying an offset which meant that the GPS data is accurate to approximatly 2 metres, depending on FOM value (Figure of Merit). Just incase you are interested, I had a keyed system running next a non keyed system some years ago and some comparisons of the keyed result, compared to the non keyed result.... Generaly there were only around 3-5 metres different in the accuracy. When they started bombing another country, this value changed substantially and varied considerably and continiously. I can't give information regarding this variation as it is classified. I also presume that they have the ability to 'turn this back on'...

  2. #12
    Maximum Bitrate skippy76's Avatar
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    On the destinator note, the maps look sh1t.

    What other options do we have?

  3. #13
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    Quote Originally Posted by siberia37
    ...Some programs implement a "snap-to-road" feature to fake you out into thinking you are always driving on a road....
    CoPilot does this.

  4. #14
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    Quote Originally Posted by skippy76
    On the destinator note, the maps look sh1t.

    What other options do we have?

    hopefully he will also support mappoint. The problem with mappoint is it does not do turn by turn I had to hack a way in mappoint to get it to work and its not 100% working. It has some issues if two turns are very close to each other.
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  5. #15
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    Quote Originally Posted by hijinks21
    hopefully he will also support mappoint. The problem with mappoint is it does not do turn by turn I had to hack a way in mappoint to get it to work and its not 100% working. It has some issues if two turns are very close to each other.
    Was it giving you audible turn by turn or just visual?
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  6. #16
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    Quote Originally Posted by ryguy
    Was it giving you audible turn by turn or just visual?

    well the main problem is that mappoint doesn't do turn by turn in the problem.. yes it gives you routes and the distance to the next turn.. but it doesn't know if you made that turn or anything. So what you have to do is find out how close you are from the next segment in the list it gives from the route and if you are close enough then show the next direction and so on. So mappoint doesn't know if you made a turn or not.. i had to do it by direction and there isn't much smarts in it. I'm not a windows programmer. This was my first VB app ever.
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  7. #17
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    It would be nice if someone would develop an app to do that with audible alerts etc
    Mappoint has by far the best database (And most accurate) of them all
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  8. #18
    Maximum Bitrate skippy76's Avatar
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    I'm an experienced windows programmer and would not mind helping out where I can. The audiable part is pretty easy, however, we would just need to decide upon an acceptable mechanism to solve:

    - If we are off route
    - Doing rerouting

    Has anyone played with Delorme Street Atlas? This does turn by turn, not had a chance to look at SDKs though.

  9. #19
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    Quote Originally Posted by skippy76
    On the destinator note, the maps look sh1t.

    What other options do we have?
    From what I've seen the V3 maps are much better!

  10. #20
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    Well i'm from canada and I know street atlas does not have street level mapping for us

    Is there a way to tie into the database of mappoint?! That would probably be ideal!
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