[导入]18.1 Why Are Maps Drawn with North at the Top?
Now it is hard to visualize a map that does not feature north at the top, but this was not always so.
The oldest known map in the accepted sense of the word was drawn about 3,800 BC, and represents the river Euphrates flowing through northern Mesopotamia,
文章来源:http://xiek.anyp.cn/blog/archive/912/040922053614203.aspx
The oldest known map in the accepted sense of the word was drawn about 3,800 BC, and represents the river Euphrates flowing through northern Mesopotamia,
文章来源:http://xiek.anyp.cn/blog/archive/912/040922053614203.aspx
