Read the contour line of a place in the sophomore geography

1. Rivers flow from high to low, and from the direction indicated in the diagram and the upper left, they should flow from north to south.

2, A: Plains B: Valleys. The contour line of the place where the first place is located is sparse, so the terrain should be relatively flat, and the terrain is low from the contour value. Ground B is a contour abrupt and high value is a valley.

3,300 as I understand it.

1. From the map, it is from top to bottom, and the direction is roughly from north to south.

From the topography and the flow of the river, it can be seen that the river develops from the valley and naturally flows out of the valley.

2. Village A: ridge (next to it), Village B: valley.

Depending on the topography, the contour line protrudes from the lower part of the ridge and the higher part of the valley, but the location of the village is not typical, and it can only be said to be next to the ridge (or a larger map is needed to determine further).

Rice. As can be seen from the contour map, Village A is located on the 400-meter contour line, while Village B is located above the 700-meter contour line, so the relative height of the two places should be more than 300 meters, roughly 300 meters.

1) Northeast to Southwest.

2) A plain B valley.

Because the area below 100m can be a plain (and there is no lower under the 100m contour line, which means that the plain area is quite large.) ）

Otomura Because it is obvious that there is a river next to it, imagine that it is a valley.

3）300m

Because you look for the point of 2, the closest contour line can be regarded as its height, and this line is the 700m contour line.

The 700m contour line and the 500m contour line have only one contour line in the middle, so the middle one must be a 600m contour line. It can be seen that the height difference between the two adjacent contour lines on the map is 100m. From this, it can be seen that the first place is on the 400m contour.

700-400=300m to get the height difference.

In fact, I think there is no need to memorize the rules to do contour questions, such as what terrain is to highlight to **... Will be easily dizzy. It's best to use your abstract thinking, and after seeing the contour line, imagine what the mountain looks like, so that it can easily come out...

Uh, there's a trick to learning, think more on your own.

There is a contour line between 50 and 40 on the left, and the height difference between any two adjacent contour lines on a map is equal, so the middle line is 45, and the contour distance of this map is 5, because the river flows from high to low, it can be seen that the northwest is high, the southeast is low, and the lower right corner is the lowest, we go down along the 40 contour line, the city is 35, and then the lower one is 30, and the right one is 25, so the height of the area in the lower right corner must be less than 25, greater than 20, and the interval is (25, 20), Count from 25 to the top along the contour line on the right, and add 5, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80 to the top, then the highest place is higher than 80 and less than 85, the interval is (80, 85), and the maximum height difference is infinitely close to the difference between the maximum value of these two intervals (25, 20) (80, 85) and the minimum value: 85-20 = 65, but it will not be equal to 65, and less than 65Find the answer closest to 65 and less than 65 in the answer.

If you don't understand, you can ask.

The denser the contour line, the steeper the terrain. The overlap is a mountain cliff.

The line formed by the points of the same height is the contour line, so if you have any questions, just ask.

This question is not conditional, and the size of the contour line is missing.

If a>b>c, 2 are ridges, and 1 slope is located on the leeward slope and the sunny slope of the summer monsoon, the growth of Masson pine should be worse; The three slopes are located on the windward slope of the summer monsoon and the sun rises, and the Masson pine grows better.

If the answer to a is that the slope is on the windward slope of the summer monsoon and the masson pine grows better, it should be the latter.

The southeast region of our country is generally hilly, the mountain is relatively small, and close to the sea, it is easy to make the ocean warm and humid air flow enter, regardless of its mountain size and small mountain, it is within the range of the air flow, and the air flow should go over the mountain, in this process, cooling, gathering, the volume is getting larger and larger, to a certain extent, can not stand the pull force falls, there is an arrow in the lower right corner of the figure, that is due north direction, so that 1 is located in the east, is windward. There is a lot of precipitation on the windward slope, and this direction is sunny, the sun is abundant, and the photosynthesis is strong....

The conditions of this question are insufficient, this map is the southeast region, the summer monsoon is the southeast wind, and there is no direction sign for this question, only the direction of the north down the south, the left west, the right east, if 1 is the windward slope, it seems that it does not meet the geographical conditions, there are two situations: if a is greater than b is greater than c, then this figure is a ridge map, that 1 should be a leeward slope, and the growth of Masson pine is poor.

If A is less than B and less than C, then this figure is a valley map, and then 1 should be a windward slope, Chaoyang, and the growth of Masson pine is good.

I also feel that the conditions are insufficient, and the north and south are not marked, so it's hard to say.

Between two contour lines, if there is a closed circle, the mantra is used: greater than the big one, less than the small one. For example, if p is 300 to the left and 400 to the right, if p is 300 to 400 above sea level, then there is no need to draw any contour lines, because all the elevations between these two contour lines are 300 to 400.

So p can only be less than 300, or greater than 400, so that you can draw another contour line.

Hello lz.

If the contour line is marked, it means that the line must have a value. If it is between 300 and 400, there should be no contour markers around the point p!

Therefore, the circle around p is either marked with 400, which means that the position of point P is higher than 400, or it is marked with 300, which means that the position of point P is lower than 300

This indicates that point P is most likely high on the top of the mountain.

First of all, let's get rid of the simple one.

The first question is "Why are the contour lines of 400 300 outside the closed curve symmetrically distributed?" The contour line of 400 300 is equivalent, why not have it to be combined", the contour line refers to the closed curve formed by the points of equal elevation on the topographic map, so the general contour line is a closed curve, (here generally refers to the complete contour map of the whole terrain) However, due to the limited space of the test paper exercises, only a part of the contour map can be intercepted, so the contour line in the map is not closed, in simple terms, it is a part of a complete contour line. The closed contour line is a complete contour line because the area is small and is just in the intercepted map, and it is not truncated.

Symmetry, on the other hand, is determined by the topography.

The second question is "Can this kind of graph follow (greater than the big one, less than the small one)?" "Greater than the big, smaller than the small"is a problem-solving technique used to determine the "internal elevation of a closed contour line that appears between two adjacent contour lines" as follows:

If there is a closed contour between two adjacent contour lines A and B (assuming A>B), the value of the closed contour line can only be A or B.

When the closed contour line takes a value (i.e., "large"), its internal elevation can only be greater than a and less than a+d (d is the contour distance). This is called "greater than great".

When the closed contour line takes the value of b (i.e., "small"), the elevation inside it can only be less than b and greater than b-d (d is the contour distance). This is called "less than small".

Obviously, this diagram does not work this trick. Because the contour lines on both sides of the closed contour line are equal, not unequal.

The third question is "First of all, the line of 300 in the first picture is wrong, and the line of 400 in the second picture is wrong, so why are the other 2 contour lines correct?" "I take the first diagram as an example, from the contour lines on the upper and lower sides, you can see that the middle of this terrain is high and the sides are low, which can be seen as part of a long and narrow plateau, so the middle part of the two 400 contour lines is greater than 400 and less than 500 (except for the closed contour line), and there are only two possibilities for the middle closed contour line, either a depression or a hill, because the part between the two 400 contour lines is greater than 400 and less than 500, so it can only be 400 and 500 contour lines. The closed contour line of 300 does not meet the requirement of equal contour distance, and a closed contour line of 400 must be drawn on the outside of the closed contour line of 300 to be considered correct.

The second diagram is the same as above, but the terrain is reversed.

The above is my understanding, I have briefly drawn a profile of these two terrains, I hope to help you.

First of all, the line of 300 in the first picture is wrong, and the line of 400 in the second picture is wrong, I really can't explain this sentence, but the contour line you said is not unclosed, the shape of the two pictures is like you take a book and squeeze it, or protrude upwards or concave downwards, a strip of mountain beams or cols.

First of all, the line of 300 in the first picture is wrong, and the line of 400 in the second picture is wrong, which is in line with the distribution law of contour lines, which is larger than the large and smaller than the small, and it is impossible for the contour line value to become larger or smaller and suddenly appear an alternative, think about it carefully!

Knowing is knowing, but it's not difficult to explain face-to-face, so you should find a teacher.

It's not: the line of 300 in the first picture is wrong, and the line of 400 in the second picture is wrong.

It's just that: in Figure 1, the closed contour lines 300 and 500 cannot coexist, and one should be deleted.

In Figure 2, the closed contour lines 200 and 400 cannot coexist, and one should be deleted.

Cause: The difference between adjacent contour lines is a fixed value or 0

For example, in Diagram 1 and Diagram 2, the contour distance is 100, then the difference between the two adjacent contour lines in the diagram can only be 100 or 0. Obviously, 300 and 500 in Figure 1 cannot be next to each other, and the difference should be 200, and the same is true for 200 and 400 in Figure 2.

The contours of 400 300 outside the closed curve are symmetrically distributed, just a coincidence of the terrain, and if the diagram is large enough, the contours of 400 300 will also be closed.

This kind of diagram also follows the principle of big and small.

Let's analyze the whole picture directly.

First of all, note that the contour value difference is 100, which means that the height difference between each adjacent line is 100. As for the problem that part of the line is not closed, because the picture is incomplete in the screenshot, if it is complete, it should be closed. You can make up for it by yourself, and you can complete and close it.

The following is an overall chart analysis.

The contour values in Figure 1 decrease from the middle to the north and south, and it is judged that Figure 1 is a high ground (mountain) as a whole. High in the middle and low at the north and south ends. A, B, and C are located on the middle elevated ground.

In the middle of two non-closed 400 lines, if there is a contour line, the line value can only be 300 or 500.

The 400 closed line at a is adjacent to the 2 400 lines, and it can be seen that the marker value at this place is wrong, and the terrain cannot be judged because the marker value is wrong.

The 300 closed line at b is lower than the value of the 2 non-closed 400 lines, which indicates that it is a low-lying place (that is, a pit) on the high ground

The 500 closed line at c is higher than the value of the 2 non-closed 400 lines, which can be known as a mountain peak.

However, a, b, and c can only be 300 or 500 together, and since the three are adjacent, their line value difference can only be 100 or 0.

The contour curve at a and b is a valley from the low value to the high value.

Figure 2 is the opposite of Figure 1.

The contour values are transferred from the middle to the north and south, and the whole of Figure 1 is judged to be a valley. Low in the middle and high at the north and south ends. d, e, f are located on the middle lowland. In the middle of two non-closed 300 lines, if there is a contour line, the line value can only be 200 or 400.

The value of 400 closed lines at d is higher than that of the two unclosed 300 lines, which can be known as mountain peaks.

The 300 closed line at E is adjacent to the 2 300 lines, and it can be seen that the label value at this place is wrong, and the terrain cannot be judged because the mark value is wrong.

The 200 closed line at f is lower than the value of the 2 non-closed 300 lines, which indicates that it is a pit on the low ground.

But d, e, and f can only be 300 or 500 together, and since the three are adjacent, their line value difference can only be 100 or 0.

The contour bend at A and B is protruding from the high value to the low value, which is judged to be a ridge.

The two errors are that a circle of 400 should not be drawn, and a circle of 300 for 2 pictures should not be drawn, because the height does not change