Show new typographic TyPo grap ic map 0 of f the zion national park one of the finest maps ever put the survey is the comment out by made by unit united ed states geological officials conceal concerning the survey of zion national new topographic map park that has just been published d copies of the map have recently been received by the park service at zion and comments of officials there are even more enthusiastic P P thus thusia lastic superintendent states that it shows the extremely rugged canyons country of zion with unusual accuracy and is also unique in being one of the first maps in the united states to be made from aeroplane photographs by the process known as aa stereo in this process aeroplane photographs of a given area are taken from two different angles so that when the two photographs are arc viewed at one time through a suitable instrument the mountains and canyons stand out in true perspective just as in the old fashioned stereoscope hundreds of such pictures were taken in mapping zion national park and were converted into a single map by the aid of a delicate elaborate instrument known as an nearly half the area of the zion map was made in even with the aid of such modern modem methods the geological survey parties worked for four seasons in order to complete data for the map A valuable feature of the new map is the geological explanation by dr H E gregory which is printed on the reverse side this clear f j and concise explanation should be of great value to students and others who have long sought the answers to the wonderful geologic e exhibits seen in the cliffs and canyons of zion dr gregory has spent many years in the zion region and is regarded in scientific circles as an outstanding authority on the geology of the area it is believed that the map and explanation will be of great benefit to the thousands of persons who annually visit zion many persons have already benefited from advance information furnish furnished e d by the geological survey in service and used us e d b by y the park making the Z zion i on relief map no now w exhibit at the utah state capitol on e Si re relief lief maps are in use several of the colleges and universities by of result versi veri ties of utah as the permanent loan by the national park service the new topographic map from which these relief models were constructed ted is now obtainable from the united states geologic survey washington D C at seventy five cents per copy it measures approximately 30 by 47 inches and is printed in five colors it is expect also be available 11 ed d that copies will a b le for sale at zion national park rk I 1 b before e fore the sum summer mer travel season on begins |