NAME

       Geo::Coordinates::OSGB::Maps - Data for OSGB Maps

VERSION

       V2.20

SUBROUTINES AND METHODS

       This module exports no functions, but just two hashes of data.

   Hash %name_for_map_series
       The keys are the single letter codes used for each map series.  The values are the
       descriptive names of each series.  Currently we have:

         A : OS Landranger
         B : OS Explorer
         C : OS One-Inch 7th series
         H : Harvey British Mountain Maps
         J : Harvey Superwalker

   Hash %maps
       The keys are short identifiers for each sheet or inset.  Where a map has more than one
       side, or includes insets then, there will be a separate entry for each side and inset.

       The value for each key is another hash containing the following items

       bbox
           The bounding box of the sheet as a list of two pairs of coordinates (in metres from
           the grid origin)

       polygon
           A list of pairs of coordinates (in metres from grid origin) that define the corners of
           the sheet.  The list starts at the SW corner (approximately, some do not have an
           obvious place to start), and works round anticlockwise.  In all cases the last pair is
           the same as the first pair.

       area
           The calculated area of the sheet in square kilometres.

       series
           A single letter series identifier -- this will be one of the keys from the
           "name_for_map_series" hash.

       number
           The identifier for this map within the series, not including any suffix for a sheet or
           an inset.  The two sides of a single map have the same number.  The number is not
           always an integer - Outdoor Leisure maps are designated "OL14" etc.  Those maps known
           by two numbers have a "number" consisting of both numbers divided by a "/"; such as
           "418/OL60" in the Explorer series.

       parent
           The key of the parent map for an inset.  Main sheets of a map will have "parent" equal
           to their own key.

       title
           The title of the map.  Different sheets and insets from the same map will have the
           same title.