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  1. #1
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    Default Map Priorities and Layering.

    Hi all, great site!
    Have been lurking for a while and scanning Indexes but could not find anything about Garmin Map priorities and Map overlay conventions.
    If anybody could point me to some references it would be appreciated.
    Tks.

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  3. #2
    Navigation software expert Kanopus's Avatar
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    Garmin can display multiple map at once. What you will see, which map will be on top, depends on 2 main factors:
    - type of the map
    - internal map priority and transparency settings

    There is a list indicating priority according to map typ, from the top to bottom:
    City Navigator
    City Select
    MetroGuide
    BlueChart
    Fishing Hotspots
    Water Waypoints and Lights
    Road & Recreation
    Topo
    WorldMap

    I'm not sure how precise is this list, but i can confirm, that type of the map is important.

    Second factor is draw priority. It is a number in range 0-31 hidden inside img. This value can be edited by some tools. Map with bigger priority are displayed over other maps.

    Map can have transparency attribute. It makes map polygons invisible. Transparent maps are displayed over non-transparent maps.

    Both factors are used by GPS when drawing maps, but i really don't know, how exactly draw order is calculated. Draw priority is a simple number, changing it gives expect effect, but it is difficult to tell, how map type is converted or compared to priority numbers.
    Thanks, Kanopus

  4. #3
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    Default

    Thanks Kanopus. I'll see what I can do with that info.

    Losted

  5. #4
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    Default Which map takes priority?

    On my SD card I have four maps of the same country merged with Gmaptool.

    If I have all maps 'turned on' in my 'settings, map, map info' will my garmin just select the most appropiate map for the road im on or does it prioritise the garmin maps first?

    The reason I ask is I am going to a remote part of India, CN only has main roads, MapMyIndia seems to have more, India Satguide maps had some different streets and a Himalaya map has a chunk of my journey. Am I better off leaving everything turned on and let the machine (Zumo 660) figure it out, or, do I keep checking maps as I go to see which is suitable?
    Last edited by DTPM; 25th August 2012 at 17:06.

  6. #5
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    Default

    Had a good read.

    Apart from CN taking priority, Im none the wiser

  7. #6
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    The one in the SD card would always take priority

  8. #7
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    Default

    Quote Originally Posted by grv2k5 View Post
    The one in the SD card would always take priority
    I would like to know where you got this info-
    [Only registered and activated users can see links. ]
    [Only registered and activated users can see links. ]

    [Only registered and activated users can see links. ]
    You have to navigate to get to the good.
    Nuvi1250/Nuvi 34xx/Nuvi 2200/Nuvi 66/Oregon 600/Galaxy S5 MM 6.0.1/TomTom GO/iGO Nextgen Avic,Basar,Isr.Gift/Navigon
    Please don't flood my pm box with questions you can post on forum!! You won't hear back from me.

  9. #8
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    Quote Originally Posted by grv2k5 View Post
    The one in the SD card would always take priority
    All of the maps are on a SD card.

    Apart from CN taking priority I dont think anyone can give me an answer as map priority depends on a hidden number in the maps.

  10. #9
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    It depends also on the device. In my 62 for example ,map drawing priority is completely different than in nuvis.
    Must manage maps showing ,using profiles coz some topos always hide other maps ,even CN.

    This thread merged with the previous one.
    [Only registered and activated users can see links. ]
    [Only registered and activated users can see links. ]

    [Only registered and activated users can see links. ]
    You have to navigate to get to the good.
    Nuvi1250/Nuvi 34xx/Nuvi 2200/Nuvi 66/Oregon 600/Galaxy S5 MM 6.0.1/TomTom GO/iGO Nextgen Avic,Basar,Isr.Gift/Navigon
    Please don't flood my pm box with questions you can post on forum!! You won't hear back from me.

  11. #10
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    My eTrex 30 can not show transparent map with setup map drawing priority to 31 as top layer of my other topo maps.
    Somehow deal?

 

 
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