Geo::Coordinates::OSGB::Maps(3)

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

VERSION
V2.16

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, on some sheets it's not entirely obvious where 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.