Quick Answer
Contour intervals affect your understanding of terrain by providing a visual representation of elevation changes, allowing you to identify potential hazards such as steep slopes, water sources, and obstacles.
Understanding Contour Intervals
When reading a map, contour intervals are crucial in determining the steepness of a slope. A contour interval of 20 feet usually indicates a gentle slope, while an interval of 80 feet or more suggests a steep slope. Familiarizing yourself with these intervals will help you identify areas of potential danger, such as landslides or rockfall.
Identifying Terrain Features
Contour intervals can also be used to identify key terrain features, such as ridges, valleys, and plateaus. By analyzing the pattern of contours, you can determine the location of these features and their relationship to one another. For example, a series of contours that converge indicate a ridge, while a series that diverge suggest a valley.
Navigation and Route Planning
When using a map to navigate, contour intervals can help you plan a safe and efficient route. By identifying the steepest slopes and most hazardous areas, you can avoid these features and choose a more suitable path. Additionally, contour intervals can help you determine the best location for a campsite, considering factors such as elevation, drainage, and access to water.
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