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Mapbox tiles

  • 1.  Mapbox tiles

    Posted 01-30-2019 04:27
    Hello,
    I am trying to create an Mapbox MBtiles File from a set of 2480 Aerial images. I have succeeded somehow but the georeferencing is not correct. There is a shift.
    It seems  to me the issue resides in the fact that my raster images are not georeferenced in WGS84 but in Luref (EPSG2169)
    What would you suggest to transform a tabfile like this one so that the raster image is represented in WGS84 making the export into MBTile correct?

    table
    !version 300
    !charset WindowsLatin1

    Definition Table
    File "2016-0059-0073-25.tif"
    Type "RASTER"
    (59000,73000) (0,0) Label "Pt 1",
    (60000,73000) (4000,0) Label "Pt 2",
    (60000,72000) (4000,4000) Label "Pt 3",
    (59000,72000) (0,4000) Label "Pt 4"
    CoordSys Earth Projection 8, 9999, 4, -192.986, 13.673, -39.309, 0.4099, 2.9332, -2.6881, 0.43, 0, "m", 6.166666667, 49.83333333, 1, 80000, 100000
    Units "m"
    begin_metadata
    "\IsReadOnly" = "FALSE"
    "\MapInfo" = ""
    "\MapInfo\TableID" = "177ce58d-0433-4644-a7c3-55116ba1de73"
    end_metadata

    Thanks

    Georges


    ------------------------------
    Georges Majerus
    Project Manager Telecom
    LuxConnect
    Bettembourg
    ------------------------------


  • 2.  RE: Mapbox tiles

    Posted 02-18-2019 03:18
    Hi Georges

    If you want to transform your Luref coordinates from the tab file above into WGS84, you will have to convert the individual coordinate.

    This could be done by
    1. inserting the value pairs into a table in MapInfo Pro
    2. Creating points using these value pairs, specifying the coordsys as Luref
    3. Using CoordinateExtractor to add two additonal columns for WGS84 coordinates and extract the coordinates as WGS84 coordinates.

    But I'm not quite sure if that will fix the issue of the shift completely.

    ------------------------------
    Peter Horsbøll Møller
    Pitney Bowes
    ------------------------------



  • 3.  RE: Mapbox tiles

    Posted 02-18-2019 07:35

    Hello Peter,

     

    Thank you very much for your valuable insight. I will give these ideas a try when I have a spare minute.

     

    Thanks

     

    Georges Majerus | Senior Project Coordinator, Fiber Network

    LuxConnect
    4, rue A. Graham Bell | L-3235 Bettembourg

    Grand-Duchy of Luxembourg
    T (+352) 27 61 68 34 
    | M (+352) 661 616 834
    georges.majerus@luxconnect.lu | www.luxconnect.lu

    Twitter : @LuxConnect
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