Before the Ordnance Survey began mapping the country in the early nineteenth century, maps were usually made for special purposes and special needs only. Maps were needed by the following:
Before the Ordnance Survey produced their first 6-inch -to-the-mile maps in 1835, early maps were not always wholly accurate. The methods of early map-makers (surveyors) were not always accurate and often names of areas (including alternative names and spellings) were inaccurately recorded. Nevertheless, early maps can contain much useful information and some are surprisingly accurate in certain regards.