"Basic Elements of Maps" PPT

"Basic Elements of Maps" PPT

Part 1: Importing new lessons

Students guess riddles

There is not even an inch of soil in the mountains,

There is not even half an acre of land on the flat land;

There is no water in the five continents and seas,

All over the world is in front of you.

Answer: map

what is map

A map is an image that uses various symbols to reduce geographical things to a certain proportion and represent them on a flat surface.

PPT on basic map elements, part 2: new lesson learning

Judgment of directions on the map

1. General method

2. Pointing method

Pointing method: The direction of the pointing arrow is true north, and then determine other directions.

The following methods are commonly used to identify directions in the wild:

1. Use a compass to identify directions.

2. Use the sun: In winter, the sunrise position is east by south and the sunset position is west by south; in summer, the sunrise position is east by north and the sunset position is north by west.

3. As long as there is sun, you can use your watch to identify the direction.

4. Use the Stars: Aim for the North Star. First, look for the spoon-shaped Big Dipper. Extend the distance between the two stars on the spoon C and then find the North Star on this straight line. The direction of the North Star is due north.

5. Use ground objects to determine the direction: Independent large trees usually have lush branches and smooth bark in the south, while sparse branches and rough bark in the north. Its south side is usually covered with lush grass, while its north side is humid and covered with moss.

6. The main entrances of larger temples and pagodas in northern China and the doors and windows of independent houses in rural areas mostly open to the south.

7. The grass is denser at the northern edge of the clearing in the forest. The growth rings on the cross section of a tree stump are generally spaced wider in the south and smaller in the north.

8. Use a satellite navigation system to determine direction.

Basic map elements PPT, the third part: scale

Calculation of scale

Given the distance on the ground and the distance on the map, find the scale

Scale bar = distance on the map/distance on the ground

Given the scale and real distance, find the distance on the map:

Distance on the map = actual distance * scale bar

Given the distance and scale on the map, find the distance on the ground:

Distance on the ground = distance on the map/scale bar

Comparison of scale sizes

a. When comparing scale sizes, first unify the representation into numbers;

b. Unit conversion: 1 kilometer = 100,000 centimeters.

Summary: The larger the denominator, the smaller the scale; the smaller the denominator, the larger the scale.

PPT on basic map elements, part 4: legends and notes

What is a legend?

Different geographical things are represented by different symbols on the map, and these symbols are called legends.

What is annotation?

The text descriptions on the map, as well as the numbers indicating the height of the mountains, the depth of the sea, etc., are called annotations.

PPT on basic map elements, part 5: summary of this section

In this lesson, we learned the basic elements of a map: direction, scale, and legend. We learned the three methods of judging direction on a map, as well as how to judge the direction scale, legend, and annotations in the wild. We also learned about the concept, formula, and Three expression methods, size comparison, range of representation, details of content and some commonly used legends. I hope everyone will read more pictures and develop the habit of acquiring geographical knowledge from pictures.

PPT on basic map elements, Part 6: Classroom exercises

1. The largest of the following scales is ( )

A. 1: 50000

B. 1 centimeter on the picture represents 50 kilometers on the ground.

C. 0___500�

D. 1:5000

2. If the straight-line distance between two places measured on the map is 3 cm, and the scale on the map is 1:6000000, then the real distance between the two places is ( )

A. 18 kilometers B. 180 kilometers

C. 1800 kilometers D. 18000 kilometers

3. If the straight-line distance between two places measured on the map is 3 cm, and the scale on the map is 1:6000000, then the real distance between the two places is ( )

A.18 kilometers B.180 kilometers C.1800 kilometers D.18000 kilometers

4. If the four maps are of equal size, then the one that represents geographical things in the most detail is ( )

A. World political map b. Beijing city map

C． Jinan City topographic map D. Taishan Scenic Area Guide Map

PPT on basic map elements, part 7: homework assignments

Make a classroom floor plan

Method tips:

Determine the scale: Estimate the length and width of the drawing paper and determine the length and width of the classroom

Determine the direction: Determine the direction of north and make a legend

Keywords: Business Planet version seventh grade geography PPT courseware free download, basic map elements PPT download, .PPT format;

For more information about the "Basic Elements of Maps" PPT courseware, please click the "Basic Elements of Maps" ppt tab.

"Basic Elements of Maps" PPT courseware download:

"Basic Elements of Maps" PPT courseware download Part 1: Introduction of new lessons Riddle guessing There is not an inch of soil in the mountains, and there is not even half an acre of land in the flatlands. There is no water all over the world, and all the countries in the world are in front of us. ... ... ... Basic map elements PPT, the second part of the content:..

"Basic Elements of Maps" PPT courseware:

"Basic Elements of Maps" PPT courseware Part One: Learning Objectives: Remember the three elements of a map, know the calculation formula of the scale, and be able to measure the distance between two places on the map. Understand the three representations of scales and be able to convert them. Know the basics of identifying directions...