Structure of Boundary-Line

Boundary-Line data is output in a layered structure. This is a simplified file structure whereby the boundaries are supplied as individual files; for example, the county file contains only counties.

An example of the GB directory and layered files.

An example of the Polling Districts England directory and layered files.

An example of the Wales directory and layered files.

Ceremonial and Historical counties are provided in separate directories called Supplementary_Ceremonial and Supplementary_Historical, respectively. Historic European Regions are provided in a separate Supplementary_Historic_European_Region directory and Country outlines are provided in a separate Supplementary_Country directory.