- Analyze a landscape (show your calculations)Basic map facts:Interval between index contours:Contour interval:The fractional scale is:Start with the fractional scale and convert the units on the ground to miles: The verbal scale is:The approximate height and width of the map estimated by counting the UTM
grids going N-S and E-W is …
(6) Calculating percentages can be tricky, so pay attention to how reasonable your
numbers are and what you think they mean. To start this problem, you know the
original scale is 1:
2
4,000 and the scale of the map as published is 1:31,700 (from (4) above). This means that more of the U.S.G.S. map was squeezed onto a page than was originally possible. Thus, the map in Fig. 6.15 was shrunk by some amount.
By what factor (percent) was the map reduced?
- Three tallest mountains:
- Stream flow arrows: Add them on map. (1) (2) (3) (4)
2 CHAPTER 6. TOPOGRAPHIC MAPS AND DIGITAL ELEVATION
MODELS
2. Analyze a landscape (show your calculations)
a. Basic map facts:
(1)
Interval between index contours:
(2)
Contour interval:
(3)
The fractional scale is:
(4)
Start with the fractional scale and convert the units on the ground to miles:
The verbal scale is:
(5)
The approximate height and width of the map estimated by counting the UTM
grids going N-S and E-W is …
(6)
Calculating percentages can be tricky, so pay attention to how reasonable your
numbers are and what you think they mean. To start this problem, you know the
1
original scale is 1:24,000 and the scale of the map as published is 1:31,700 (from (4)
above). This means that more of the U.S.G.S. map was squeezed onto a page than
was originally possible. Thus, the map in Fig. 6.15 was shrunk by some amount.
By what factor (percent) was the map reduced?
b. Three tallest mountains:
c. Stream flow arrows: Add them on map.
(1)
(2)
(3)
(4)
2
*** NOT ON SCALE: USE ONLY FOR ANSWER c. ***
3
CHAPTER 6. TOPOGRAPHIC MAPS AND DIGITAL ELEVATION
MODELS
2. Analyze a landscape (show your calculations)
a. Basic map facts:
(1)
Interval between index contours:
(2)
Contour interval:
(3)
The fractional scale is:
(4)
Start with the fractional scale and convert the units on the ground to miles:
The verbal scale is:
(5)
The approximate height and width of the map estimated by counting the UTM
grids going N-S and E-W is …
(6)
Calculating percentages can be tricky, so pay attention to how reasonable your
numbers are and what you think they mean. To start this problem, you know the
1
original scale is 1:24,000 and the scale of the map as published is 1:31,700 (from (4)
above). This means that more of the U.S.G.S. map was squeezed onto a page than
was originally possible. Thus, the map in Fig. 6.15 was shrunk by some amount.
By what factor (percent) was the map reduced?
b. Three tallest mountains:
c. Stream flow arrows: Add them on map.
(1)
(2)
(3)
(4)
2
*** NOT ON SCALE: USE ONLY FOR ANSWER c. ***
3