mapsource overzoom

Discussion in 'General GPS' started by Rick, Mar 3, 2004.

  1. Rick

    Rick Guest

    hello,
    on my GPSMAP 60C when I navigate I can use the map
    with 80 meters step. if I zoom more it says "overzoom"
    even if the resolution is 5 meters as reported by the GPS.

    how come does it happen ?

    is this normal?

    thanks

    Rick
     
    Rick, Mar 3, 2004
    #1
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  2. Rick

    Holger Issle Guest

    On Wed, 3 Mar 2004 08:18:14 +0000 (UTC), Rick wrote:

    > on my GPSMAP 60C when I navigate I can use the map
    > with 80 meters step. if I zoom more it says "overzoom"
    > even if the resolution is 5 meters as reported by the GPS.


    This depends on the map you loaded. Within the map, there is an
    accuracy indicator, tell the system to what scale the map can be
    considered good enough so the triangle on screen is really where you
    are related to map details. Once you zoom in more, the map itself gets
    wrong, even it seems to display more detailed. That is what overzoom
    means. This is not important as long as you try to look at self
    recorded data like waypoints or tracks.
    --

    Ciao,
    Holger (GUS-KOTAL, GUS#1100)

    90-92 Honda CB400 10 Mm | 93-95 Yamaha TDM 850 26 Mm
    95-97 KTM 620 LC4 13 Mm | seit 97 BMW R1100GS 50 Mm (Die Renndrecksau!)

    cu @ http://www.issle.de
     
    Holger Issle, Mar 3, 2004
    #2
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  3. Rick

    Rick Guest

    thank you,
    exactly I wanted to ask if you know how to tell the system
    the scale the map can be considered good ?
    Default is 80m, I'd liek to tell 10 meters, but I did not find
    a way to do it...

    thanks

    Rick

    In article <>, Holger Issle wrote:
    > On Wed, 3 Mar 2004 08:18:14 +0000 (UTC), Rick wrote:
    >
    >> on my GPSMAP 60C when I navigate I can use the map
    >> with 80 meters step. if I zoom more it says "overzoom"
    >> even if the resolution is 5 meters as reported by the GPS.

    >
    > This depends on the map you loaded. Within the map, there is an
    > accuracy indicator, tell the system to what scale the map can be
    > considered good enough so the triangle on screen is really where you
    > are related to map details. Once you zoom in more, the map itself gets
    > wrong, even it seems to display more detailed. That is what overzoom
    > means. This is not important as long as you try to look at self
    > recorded data like waypoints or tracks.
     
    Rick, Mar 3, 2004
    #3
  4. Rick

    Plug Guest

    The EPE (what I think you are referring to when you incorrectly say
    resolution) is unrelated to the map. However the overzoom is an
    indication of the map accuracy and the point at which it becomes
    meaningless to zoom in any more.

    If you repeatedly magnified a copy of a paper map on a photocopier you
    might realise when you were "overzooming" - you wouldn't gain any
    accuracy over the source map. But if you keep zooming in on
    intersecting vector lines it is not so obvious so the system gives you
    that indication.

    You can't change the map accuracy so why would you want to change the
    information? It doesn't really get in the way. Or do I misunderstand
    your question?

    Rick <> wrote in message news:<>...
    > thank you,
    > exactly I wanted to ask if you know how to tell the system
    > the scale the map can be considered good ?
    > Default is 80m, I'd liek to tell 10 meters, but I did not find
    > a way to do it...
    >
    > thanks
    >
    > Rick
    >
    > In article <>, Holger Issle wrote:
    > > On Wed, 3 Mar 2004 08:18:14 +0000 (UTC), Rick wrote:
    > >
    > >> on my GPSMAP 60C when I navigate I can use the map
    > >> with 80 meters step. if I zoom more it says "overzoom"
    > >> even if the resolution is 5 meters as reported by the GPS.

    > >
    > > This depends on the map you loaded. Within the map, there is an
    > > accuracy indicator, tell the system to what scale the map can be
    > > considered good enough so the triangle on screen is really where you
    > > are related to map details. Once you zoom in more, the map itself gets
    > > wrong, even it seems to display more detailed. That is what overzoom
    > > means. This is not important as long as you try to look at self
    > > recorded data like waypoints or tracks.
     
    Plug, Mar 4, 2004
    #4
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