Answer the following questions:
1. What are the topographic maps?
2. Name three features that are shown by red and brown colours on a topographic map
3. What is a scale? Why is scale used on maps?
4. What is meant by R.F.? State its one advantage.
5. Why is graphical scale preferred to represent scale on a map?
6. How is distance along a straight line on a map measured?
7. How can the length of a river measured?
Answers
Answer:
Topographic maps are a detailed record of a land area, giving geographic positions and elevations for both natural and man-made features. They show the shape of the land the mountains, valleys, and plains by means of brown contour lines .
Explanation:
Answer:
1. A topographic map is the use of elevation contour lines to show the shape of the Earth's surface.
2. The colors of the lines usually indicate similar classes of information:
a. topographic contours (brown); lakes, streams, irrigation ditches
b. hydro graphic features (blue); land grids and important roads (red);
c. roads and trails, railroads, boundaries, and other cultural features (black).
3. Map scale refers to the relationship (or ratio) between distance on a map and the corresponding distance on the ground.
4. it is only a fraction and is indented of any particular unit of a measurement, it can be used in all the countries.
5. The graphic scale is the most useful scale if the map will be reproduced and changed in size, because both the map and the graphic scale will change in the same ratio while the other scales will no longer be valid.
6. Line up the edge with both the first (“point A”) and second (“point B”) points you want to measure the distance between, then make a tick mark on the paper where each point is ... Finding Distance Using the Bar Scale. ... Place a straight edge of a piece of paper onto your map.
7. The length of a stream is the distance measured along the stream channel from the source to a given point or to the outlet, a distance that may be measured on a map or from aerial photographs. On large-scale maps, it is measured along the geometrical axis, or the line of maximum depth.
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