Exercise 29 1. What is the contour interval of the map? 2. What is the differenc

Question

Exercise 29

1. What is the contour interval of the map?

2. What is the difference in elevation between index contours?

3. What is the elevation of the highest contour line at the top of the eastern Twin Butte?

4. What do the dashed blue lines represent?

5. What do the gray lines around and between the Twin Buttes represent? (thick lines)

T-18 b93 595 :96 97 598 57'30 SCALE 1:24 000 0.5 GN 183 MILS 1000 500 METERS 1000 2000 1 0 37 11 MILS MILES 100 1000 200 8000 UTM GRID AND 2014 MAGNETIC NORTH DECLINATION AT CENTER OF SHEET FEET U.S. National Grid 00,000-m Square ID CONTOUR INTERVAL 20 FEET NORTH AMERICAN VERTICAL DATUM OF 1988 WE KE This map was produced to conform with the National Geospatial Program US Topo Product Standard, 2011 A metadata fle assoclated with this product is draft version Q.6.16 Grid Zone Designation 125

Explanation / Answer

1.contour interval in 20 feets (difference in elevation of each line )

To find it easy way is to find index contour which are darkly marked and values are given like here 6000 -6100 -6200 etc now look every fifth contour line is index i.e. the interval so eg:6100-6000=100/5=20.

2.like mentioned above difference in elevationbetween index contour is 100.

3.twin butte highest elevation is 6300 feet.

4.dashed blue line are water stream flowing downward towards lower elevation

5.gray line shows densely built up area

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