From 1810 to 1812 he travelled in France, Switzerland and Italy, and on his return to Paris published an Essai critique sur la topographic de Syracuse (1812), designed to elucidate Thucydides.
The Great Basin is not, as its name implies, a topographic cup. Its surface is of varied character, with many independent closed basins draining into lakes or "playas," none of which, however, has outlet to the sea.
The above remarks apply more particularly to topographic maps.
The results have been published on a scale of 1:25,000 (776 sheets, since 1866), 1:50,000 (Topographic and Military Map, 62 sheets, 1850-1864, and a Waterstaatskaart, 1864-1892), and 1:200,000 (Topographical Atlas, 21 sheets, 1868-1871).
A topographic map (i: 126,000) embracing the whole of western Russia, with Poland and the country of the Don Cossacks, is designed to be extended over the whole empire.
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