Google Earth experience

Google Earth experience

Peter Lee 2005.05.12 videosky.9126.com

 

What is Google Earth? An electronic globe is a tool used to navigate the world in front of a computer and zoom in from the whole earth to every street. My first access to Google Earth was deeply affected by its powerful functions. Let's take a look at the feeling of fly to Forbidden City.

1. Google Earth Interface

2. Our China

3. can see the name of each province

4,

5. Bejing

6. Center BEIJING

7,

8. It's the whole Forbidden City

9. so clear

10. Most zoom level

 

[Postscript] technical features of Google Earth

1. using DirectX and OpenGL

2. Seamless image stitching: Images of Google Earth come from satellite remote sensing images of NASA and other institutions. For key areas (such as Beijing), the image quality is very high; for less important areas (such as the suburbs of Beijing), the image quality is reduced. What makes Google Earth powerful is that these images with different definitions can be seamlessly spliced to achieve very good results.

3. Hierarchical encoding: When we use Google Earth, map data is obtained online. From the entire map at the beginning to a meticulous Street, the images become clearer and clearer, the concept of classifier encoding must be involved here. I guess the image uses a compression technology similar to wavelet transform.