## 2 Research on Visualization of Landslide Monitoring Literature
### Statistical Publications from Various Countries  
By analyzing the publication numbers of multiple countries under the abovementioned retrieval, it can be seen that unique geological conditions and comprehensive economic strength are important factors that influence the progress of landslide hazard monitoring in various countries. The top 10 countries in terms of publication numbers were identified, as shown in Figure 7. Among them, 1337 papers were published by Chinese scholars, ranking the first in the world with 21,581 citations. A total of 343 papers were published by Italian scholars, ranking second in the world with 10,091 citations. In addition, 230 papers were published by American scholars, ranking third in the world with 6497 citations. According to statistics from the United Nations and the International Monetary Fund (IMF), the top 5 countries account for about 24.199% of the world's total population, and account for about 50.262% of the world's gross domestic product [23].  
Visual analysis was conducted on the number of publications in the field of landslide monitoring in various countries, and the analysis results clearly showed the number of publications and cooperation relationships among countries (Figure 8). Considering the geological conditions and economic development, China has a complex geological structure and a high population density, making it one of the countries with the most  
Figure 7: Statistics on the volume and relevance of publications in various countries.  
severe geological disasters in the world. Moreover, China is highly concerned about landslide monitoring and has strong cooperation with other countries. The publication number of China ranks first, which is about 3.90 times that of Italy, in second place. Italy carried out landslide monitoring very early, as 80% of its land area is mountainous and hilly. In the 1860s, Italy first established a civil engineering force to conduct landslide monitoring research, pioneering modern landslide monitoring studies [24]. The research results have great reference significance for the modern monitoring of global landslides. The United States rank third in publication volume and the country has a high total link strength. Leading advanced technology in high-tech fields such as computer science and information science has effectively promoted the high-level development of its landslide monitoring technology.  
However, due to the differences in terrain and landforms among different countries, as well as the landslide formation and evolution feature under different geological conditions, there are significant differences in the applicability and application effects of various landslide monitoring technologies under different terrain and landforms. For example, InSAR technology can play a good role in the United States with a wide geographical area as a whole, but its applicability is poor in western China, where there is a large amount of vegetation cover. In addition, one landslide may be composed of different geological structures, and actual conditions need to be comprehensively considered. Therefore, there is an urgent need to research a comprehensive landslide monitoring system based on \"Space-Sky-Ground-Underground' monitoring technology to compensate for the shortcomings of single monitoring technology, such as data dispersion, low monitoring accuracy, difficulty in real-time, and poor robustness, and to further achieve integrated landslide monitoring with full distribution, high precision, full real-time monitoring, and high robustness.