Transcription of FEATURES SHOWN ON TOPOGRAPHIC MAPS - USGS
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GEOLOGICAL survey CIRCULAR 368 FEATURES SHOWN ON TOPOGRAPHIC MAPS UNITED STATES DEPARTMENT OF THE INTERIOR Douglas McKay, Secretary GEOLOGICAL survey W. E. Wrather, Director GEOLOGICAL survey CIRCULAR 368 FEATURES SHOWN ON TOPOGRAPHIC MAPS By John B. Rowland Washington, D. C., 1955 Free on application to the Geological survey , Washington 25, D. C. GEOLOGICAL survey TOPOGRAPHIC INSTRUCTIONS Chapter 1 B 3 FEATURES SHOWN ON TOPOGRAPHIC MAPS Contents Abstract .. Principles of map representation 1. Definition of a n1ap a. TOPOGRAPHIC map .. b. Planimetric map .. 2. Elements of map construction . a. Colors and classes of FEATURES .
Surveys made on the ground and from photographs are organized in a coherent form and reproduced graphically according to a plan. To be useful the map must present information legibly. The graphic accuracy must be consistent with the ... tures--hydrographic information- …
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