Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. A map is a graphical representation of a portion Of the earth's surface. Information of the natural and artificial features is conveyed to the reader by means of lines, symbols, words, and abbreviations. It is drawn to scale - that is, there is a definite relation between the space on the map and the ground distance represented.