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How to divide a region by rectangle on a map

Source: Internet
Author: User
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First, let's take a look

 

It is mainly to determine the longitude and latitude of the Beijing region based on Baidu encyclopedia, and then calculate the approximate value. And the longitude and latitude order of the rectangle on the map is

Left, top left, top right, and right are set clockwise. If the order is reversed, it may not be a rectangle.

This document calls a third-party amap api.

The source code is provided below:

<! Doctype HTML public "-// W3C // dtd html 4.01 transitional // en"> <HTML>


 

 

There are also comments in the source code. If you do not understand them, leave a message for consultation. Thank you.

 

 

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