What is the magnetic declination on the compass rose to the left of the bathymetry map of Willemsen Island in Figure 7? Hint: First check which direction magnetic north is located in relation to true north (either West or East of true north). Then check the degrees of difference between the true north zero degrees (marked with a star) and magnetic north zero degrees (marked with an arrow) at top of compass rose.

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A: What is the contour interval for this map? Assume the elevation is given in feet above sea level

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A: What elevation, approximately, does The Sandy River in Oregon start at in (meters and feet}

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