Above sea level, the elevation of the Plaza de Bolivar, its topographical centre, being 3025 ft.
Glockedon, the author of an interesting road-map of central Europe (1soi), Sebastian Munster (1489-1552), Elias Camerarius, whose map of the mark of Brandenburg won the praise of Mercator; Wolfgang Latz von Lazius, to whom we are indebted for maps of Austria and Hungary (1561), and Philip Apianus, who made a survey of Bavaria (1553-1563), which was published 1568 on the reduced scale of 1:144,000, and is fairly described as the topographical masterpiece of the 16th century.
The great development of photography has been a notable aid to explorers, not only by placing at their disposal a faithful and ready means of recording the features of a country and the types of inhabitants, but by supplying a method of quick and accurate topographical surveying.
From the descriptive or topographical point of view, geometrical form alone should be con- Land sidered; but the origin and geological structure of forms. land forms must in many cases be taken into account when dealing with the function they exercise in the control of mobile distributions.
Their speed must obviously depend greatly on topographical conditions.