Given the trend and location of the 40_foot long elevation contour. If you were

Question

Given the trend and location of the 40_foot long elevation contour. If you were walking along the water's edge, how would you characteruze the topography and relief of the coastline?steep?gentle relief?
which portion (NW,NE,SE,SW) of the map has the greatest relief?

347 120 440 109 122 e200 175 139 440 240 112 200 240 120 135 462 313 103 306 157 373 317 253 363 154 BM 401 BM 112 80 40-58 104 64 -360 270 PACIFIC OCEAN 160 440 120 374 310 80 BM 148 140 104 80 139 Derived from: STEWARTS POINT QUADRANGLE CALIFORNIA-SONOMA CO 7.5 MINUTE SERIES. TOPOGRAPHIC) 0 40 280 160 .97 3120 1000 2000 5000 FEET

Explanation / Answer

As we know the closer the contour lines, the steeper the slope; the farther apart the contour lines, the gentler the slope. By looking at the map we find the contour lines are almost apart along the coastline so this map is having a gentle slop in the SE part of the map.
In order to determine the relief, we can calculate by calculating the difference between the two points. ie., so the various values as follows
NE = 800-64 = 736
NW= 492-40 = 452
SE=480-40 = 440
SW= No data available, As this portion of the map is occupied by Pacific ocean.
So from the above, it’s clear the NE part of the map is having the greatest relief.

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