Talking about GIS and geography language

In the early 21st century, that is, the life of our generation yesterday and today, along with the "Space Awakening", GIS is gradually known to people. Geographic information system based on geo-principles is called the third-generation geographical language in academia. This concept was first proposed by Mr. Peng, the father of China's GIS. This "Space Awakening", in today's view, is even more applied in the field of non-geography. Well, we naturally think of a word: 80% of the world's things are geographically related. Seems to be a good explanation for this phenomenon. Since GIS is the third-generation geography language, first explain what the first two generations of geographical language are.

The ancients often used poetry to express geographical location and geographical space-time characteristics associated with the location. Li Bai's "June did not see the Yellow River water days up, running to the sea no longer back." "It is said that the birthplace of the Yellow River is very high. This poem not only shows the direction of the Yellow River, but also reveals the topography characteristics of the West High east of China, as well as the "Dai-Zong" in Du Fu's "Wang Yue". Qilu Green unfinished. ": Description Taishan is the highest mountain in the Qilu land, as Du Fu's" that is, from the Wu Gorge, then Xiangyang to Luoyang ", and do not say that the author wants to express the joy of rebellion back home, poetry described from Chongqing ka Lingjiang to Chongqing East Gate Wu Gorge to Hubei Xiangyang, finally to Henan Luoyang geographical location relations. Therefore, we refer to the expression of geographical location and characteristics by words such as poetry and proverbs as the first generation of geographical language.

We often refer to a paper map as a second-generation geographic language, and of course the map of ancient times printed on silk or wall. This approach lasted until the end of the 20th century and was the most mainstream form of geographical information expression. When we open a paper map, the information we can see is always limited. The scale of the map always determines the extent and extent of a paper map, and the means of preservation are limited.

This is how the first two languages are expressed. The ultimate expression of GIS is not fundamentally different from that of paper maps. It also expresses geographic features by means of points, lines, and polygons. From the perspective of visual representation, GIS computer display, spatial data layering and database storage make it much better than other ways to express geographic features. In GIS, geographic features are layered according to their nature, and we can control the display of the map content by the visibility of the layer to show only the layers we are interested in, and by zooming the map to control the extent and level of detail of the map.

These are just some of the most basic features of GIS. and the powerful spatial analysis function of GIS makes this new generation of geographical language richer and more powerful in expressing ability. Today, GIS is no longer a new concept. Unconsciously, has penetrated into the public's daily life. Many people may not know what GIS is, but they are using it, such as navigation and Baidu maps. Like the progress of computer technology, GIS by a variety of high-tech east wind, but also in the first sublimation of their own ability. From the two-dimensional GIS to the three-dimensional virtual geographical environment, and then to the exciting augmented reality, we have witnessed its progress, but also enjoy the surprise that it brings us.

Talking about GIS and geography language