PAPERS ON GEOLOGY AND GEOGRAPHY 211 



12. Popular Uses. 



Motor users, both for business and pleasure, find the 

 maps of great value because of the accurate record of 

 roads, grades and distance between distant points. 



13. Statistical Uses. 



Such maps are of wide use and recognized value as base 

 maps for graphic representation of facts relating to pop- 

 ulation, industry, products, etc. 



IJf. National Defense. 



Such defense can be efficiently planned only where ac- 

 curate topographic maps are available. The transfer, dis- 

 position and maintenance of a military organization re- 

 quire a detailed knowledge of topography. For offensive 

 and defensive preparation such maps are absolutely in- 

 dispensable. As a measure of preparedness, such maps 

 justify all possible haste for their completion. 



About one-third of Illinois has been topographically 

 mapped, but some revision of the older maps has been 

 found necessary, so that 30 ^c of the State now has good 

 maps available. As fast as the quadrangles of a county 

 are completed, the State issues a topographic map of that 

 County. Maps of eight counties are now available (Clin- 

 ton, Gallatin, Hardin, Lawrence, McDonough, Monroe, 

 Randolph and St. Clair). As soon as three quadrangles 

 and parts of five more are completed, the State can issue 

 topographic maps of Alexander, Jackson, Johnson, Mas- 

 sac, Pope, Pulaski, Saline, Union and Williamson Counties. 



As numerous drainage projects and many miles of high- 

 ways will be planned and constructed in the next decade, 

 the wisdom of hastening the completion of our State Topo- 

 graphic map is obvious. Lack of it means not only de- 

 lay in carrying forward certain improvements, but addi- 

 tional cost for development and construction work pre- 

 ceding their completion, and the people of the State pay 

 for this extra cost in higher utility and service charges. 

 Thus our State Legislature, by making an appropriation 

 of $70,000 for the next biennium for this work, will assist 

 greatly in the State's development and will save our peo- 

 ple many dollars in unnecessary construction costs and 

 capitalized charges. 



