The four main points on a compass are: north, east, south and west. A compass is used to work out direction. A four-point compass can give a rough direction whereas a sixteen-point compass is much ...
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How to read contour lines

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The technique of contour mapping is recommended as an indispensable instrument in evaluating an ecosystem. Since the subject is unfamiliar to many, this article explains the basic steps involved in ...
Jim Stracka is the president and CEO of StrackaLine, which makes green contour maps for golf courses, superintendents and players. More than 700 courses have had their greens mapped by StrackaLine, ...