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3 Responses

  1. mcityrk
    mcityrk June 26, 2014 at 9:13 am | | Reply

    This looks to me like an updating of the Clarke grid with the addition of color to signify A, B, C, D, E regions and a gradient of each color across each region going from most useful to least useful accuracy.

  2. Mary Dexter
    Mary Dexter June 26, 2014 at 10:53 am | | Reply

    Left side reads “Measured bg”

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