Show THE FRISCO quadrangle ane topographic map of a portion of beaver county utah the engraving of the new government topographic map of the frisco special utah quadrangle has just been completed by the united states geological survey at NV washington ashington and the map is available for distribution this map represents by far the most complete survey ever made of this section of the state it shows so clearly every physical feature of the country covered that the character of any part of the quadrangle as well as the shapes and areas of the hills aill valleys can be seen at a glance the elevation of any particular point in the entire area can be easily determined this relief of the country is graphically shown by means of brown contour lines ebah one of which represents a certain elevation above the sea that is the traveler following the course shown by one of these contour lines will go neither up hill nor down hill but on a level the elevation indicated by every fifth line is shown by figures on the map and it is interesting to determine the heights of different points by simply counting the coun tours up or down from one of the marked lines it is easy to understand how such a map is of prime value to the engineer who may be laying out a railroad or trolley route a highway a drainage or irrigation system in fact any piece of engineering work the water features of the quadrangle str streams earns lakes etc are shown in blue with the same exactness exact riess of outline as the land features in addition to the topography the map shows in black all the works of man roads principal bridges towns houses etc the topographic mapping done by the geological survey represents the highest type of geographic work and the maps show substantially everything as it is on the ground at the time of survey in making the survey of this particular area the topographers ers tramped over practically every portion of the quadrangle hundreds huni reds of miles being thus covered permanent iron benchmarks bench marks showing exact elevations were also set at varl various ous points in the quadrangle the location of these marks is indicated accurately on the map and they can be used for all time as the basis for any further elevation surveys desired this sort of map making is a very different undertaking der taking from that of constructing an average geographical map which is generally a matter of mere approximation aal compilation everything on the geological survey topographic sheet is exact and true to nature this sheet forms but one small section of the gret topographic atlas or map of the united states which the geological survey is making and which will be the largest and yet most detailed map in the world already nearly nineteen hundred of these sheets have been completed covering overa over a third of the country in some parts of the country much of the work is carriel carrie 1 through rough and almost impassable areas with dense forests insurmountable precipices or deep morasses hundreds of temporary camps are made during each field season at altitudes ranging from above snow line to below sea level all this work is followed by an enormous amount of office drafting and we task is finally completed in examples of copperplate copper plate engraving ani lithographic printing second to no others in the world the cost to the government of these quadrangle surveys for both field and office work ranges from to each but the maps are sold at only the nominal cost of paper and printing 5 cents a copy or 3 a hundred the geological survey will furnish without charge index sheets showing all the topographic maps which it has published |