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18.78 West Foothill Road Corridor Overlay District, the regulations of this chapter <br /> shall control. <br /> 18.70.050 Definitions. <br /> The terms used in this chapter shall have the following meaning: <br /> A. Contour Interval. <br /> Contour interval means the difference in elevation between adjacent <br /> contour lines on a contour map or topographical map. <br /> B. Contour Line. <br /> Contour lines are the horizontal lines, curved or straight, that join points of <br /> the same elevation (height) above a given level, such as mean sea level. Contour <br /> lines can graphically show land features such as valleys, hills, creeks, and <br /> ridgelines. The spacing between contour lines - wide or narrow -- can graphically <br /> show the relative steepness (grade) of the slope. <br /> Figure 1, below, shows contour intervals reflected as contour lines, and how <br /> the spacing between contour lines can indicate the relative grade of the slope. <br /> -1- <br /> Contour Intervals • <br /> (Vertical) \ 'N <br /> 040111111 <br /> *00 <br /> il►t <1 <br /> l <br /> Steep to Very' 1 <br /> Steep Slopes <br /> Moderate to <br /> Steep Slopes <br /> Figure 1: Contour Intervals, Contour Lines, and Slope Grades. <br /> 5 <br />