globes and maps 2
TRANSCRIPT
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Using Globes and Maps
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parallel meridian
shape
length
direction
0°
Change rules of degrees
amount
circle semicircle
equator is the longest equal
East-west North-south
equator prime meridian
Comparison of meridian and parallel
90°lines to the north and south of the equator
180°lines to the east and west of the prime merdian
countless
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Let’s have a look
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China on different kinds of maps
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图例和注记 方 向
比 例 尺
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表示形式
比例尺比例尺
概念:表示实地距离在图上缩小的程度,又称缩尺。
比例尺= 图上距离实地距离
1 : 100图上 1 厘米代表实地距离 100 厘米
1100 数字式:
文字式: 线段式: 0 100 200 米
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文字式 线段式 数字式
图上 1厘米代表实地距离 ____千米
1 : ______
图上 1厘米代表实地距离 20米 1 : ______
图上 1厘米代表实地距离 ____千米
1 : 5000000
0 1 千米
0 ( )米
0 ( )千米
练一练练一练
1
5050
2 00020
100 000
以上三个比例尺中,哪个最大?哪个最小?
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在图幅不变的情况下,比例尺越大(小),地图表示的地区范围就越小(大),表示的内容也就越详细(简略)
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AA BB
CC