800 words to identify the geographical direction.

for reference only

How to use the stars in the sky to tell the direction? Taking advantage of the characteristics of the sun "rising in the east and setting in the west", the sun in all parts of the earth generally rises in the west and sets in the west. So no matter where you are, as long as the weather permits, you can use the sun to tell the direction. For the mid-high latitudes in the northern hemisphere, the sun is in the south most of the day, and the shadow of objects always faces north (northwest in the morning, due north at noon and northeast in the afternoon), so we can use the shadow of ground objects to identify the direction. Use observation method:

Method 1: First, put the watch flat and the hour hand points to the sun. Secondly, before noon at 12, clockwise, and the bisector of the angle between the hour hand and the 12 scale line is south. Third, after noon 12, press counterclockwise, and the bisector of the angle between the hour hand and the scale line at 12 is south. (For example, figure 1-4-8 in the textbook)

Method 2: Divide the current time (24-hour clock) by 2, so that the position corresponding to the quotient on the dial is aligned with the sun. At this time, the direction corresponding to 12 on the dial is north. For example, at 16 o'clock, aim the 8 o'clock position on the dial at the sun, and then 12 refers to the north. "Time is half of the sun, 12 points to the north" or "Time is half of the sun, 12 points to the north". Use this formula to help you remember, so that you won't turn when you travel.

(2) Look for Polaris to identify the direction

Can any students find the North Star in the sky? How to find it? ]

On a clear night, you can use Polaris to tell the direction. Polaris is located in the sky due north. If you can find the North Star, you will find the true north direction, and the other directions will be easy to determine. Polaris is the last star on the handle of the little Beidou (as shown in the textbook 1-4-9), but the whole little Beidou is often difficult to see. So we should look for Polaris according to other stars around it.

According to the method provided in the textbook, students are required to observe at night. ]

1, look for Polaris according to Ursa Major.

The Big Dipper is the main bright star of Ursa major, and they are arranged in a spoon shape. (For example, textbook map 1-4-9) According to the Big Dipper, the way to find the North Star is: first, find the two bright stars at the spoon head of the Big Dipper-Tian Xuan and Shu Tian, connect them with imaginary lines, and extend the connecting line to Shu Tian for about 5 times, and you can see a bright star, that is, the North Star.

2. Look for Polaris according to Cassiopeia

Cassiopeia is opposite Ursa major, and its five bright stars are arranged in an oblique letter "W" or "M", among which three stars are brighter. The star in the middle of the three stars forms an imaginary connection with a darker star in front of it. On the extension line of the connection, there is a bright star, the North Star. (For example, figure 1-4- 10 in the textbook)

Use the direct pointing tool to determine the direction.

Use maps to identify directions.

Identify the direction by the stars

Distinguish direction by using ground objects

compass

Global (satellite) positioning system

Identify the direction on the map

Use the map outside the venue to determine the direction

Universal orientation method

Directional calibration method

Orientation method of longitude and latitude network

Identify the direction according to the sun