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Support GPS overseas

Discussion in 'Android Devices' started by MtnDew31693, Feb 6, 2013.

  1. MtnDew31693

    MtnDew31693 Member
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    Hey guys, got a quick question. I'm planning on going to Europe sometime this year to do some site seeing and was wondering if GPS would work over there. Obviously I won't be able to get a data connection (or any connection :D) but will I still be able to get a GPS lock over there. I've downloaded offline section of google maps for the areas I would like to visit. I don't think I can get directions without a data connection, but will GPS still place me on the offline map? Thanks for the help guys.
     

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  2. Harry2

    Harry2 Android Expert
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    Yes, GPS will place you on the offline map of Maps :)

    You might have a look at the app OsmAnd.
    The app let you download offline maps of worldwide areas and has a search function and a simple routing function, both without needing a data connection.
    And this OpenStreetsMaps have more details as Maps for big cities.

    Harry
     
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  3. MtnDew31693

    MtnDew31693 Member
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    Awesome, thanks man. I'll definitely check out those apps
     
  4. remanifest

    remanifest Android Expert
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    GPS worldwide is using the WGS84 ellipsoid datum, so yes, you will be able to interface over there. In Germany and some other countries you may have to switch datums but that's easily done.
     
  5. MtnDew31693

    MtnDew31693 Member
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    Could you please explain what a datum is and how you go about switching it? I am not well versed in such things :)
     
  6. remanifest

    remanifest Android Expert
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    A datum is a theoretical construct that first relies on creating a potato-shaped object called a "geoid", then from that, constructing an ellipsoid which will serve as the basis for the datums to operate on. It is a way of projecting the globe and preserving area and distance (shape as well, depending upon scale and format), so that we may use GPS and other technologies.

    There are hundreds of datums used worldwide, but WGS84 was the latest one to gain widespread use. It was conducted in 1984 by the U.S. Department of Defense and now used in almost every country in the world. It uses the Earth's center of mass (determined from satellite technology) as a benchmark.

    That was probably more than you asked for, but that's a brief overview of what a datum is.

    It looks like I misspoke earlier, as I don't see a way to switch datums on the fly with Google Maps, but it looks like Navfree (free on Google Play) supports a bunch of different countries using an Open Street Maps sort of format.

    Keep in mind that data from places like Open Street Maps does not face the same level of verification and scrutiny than that produced by cartographers, so always be cautious of your surroundings even when using a GPS.
     
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  7. MtnDew31693

    MtnDew31693 Member
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    Awesome, that explained it quite clearly :) Thanks man.
     
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