100 GIS practical application cases (53) - making three-dimensional image map as the base map of urban spatial pattern analysis

In general, it is divided into three parts

1、 Download Image ;

2、 Download elevation data ;

3、 Set up the image map ;

4、 Do analysis on the standing image .

Let's talk about the first three parts today ： How to make a three-dimensional image .（ Especially in google earth After you can't use it ）

01

Download Image

The software used is called “ canyon GIS Map downloader ”

 Download address ：http://www.gggis.com/

Web page

Install after downloading directly , Then open the software . After the software is opened, you need to register and log in to download the map , Unable to pay . I'm using “ Rectangle Download ”, The selected city is Lanzhou ：

Rectangular download box selects the download area

After selecting the area in the box, the dialog box of splicing map will appear , The first step is to select the downloaded map and the level of the map , I chose the sky map 、16 level , When you choose a higher level , The more tiles there will be , The larger the splice size , There is no need to choose the highest level , Select the appropriate according to the study area .