Abstract
Abstract. With the wide application of Big Data, Artificial Intelligence and Internet of Things in geographic information technology and industry, geospatial big data arises at the historic moment. In addition to the traditional "5V" characteristics of big data, which are Volume, Velocity, Variety, Veracity and Valuable, geospatial big data also has the characteristics of "Location Attribute". At present, the study of geospatial big data are mainly concentrated in: knowledge mining and discovery of geospatial data, Spatiotemporal big data mining, the impact of geospatial big data on visualization, social perception and smart city, geospatial big data services for government decision-making support four aspects. Based on the connotation and extension of geospatial big data, this paper comprehensively defines geospatial big data comprehensively. The application of geospatial big data in location visualization, industrial thematic geographic information comprehensive service and geographic data science and knowledge service is introduced in detail. Furthermore, the key technologies and design indicators of the National Geospatial Big Data Platform are elaborated from the perspectives of infrastructure, functional requirements and non-functional requirements, and the design and application of the National Geospatial Public Service Big Data Platform are illustrated. The challenges and opportunities of geospatial big data are discussed from the perspectives of open resource sharing, management decision support and data security. Finally, the development trend and direction of geospatial big data are summarized and prospected, so as to build a high-quality geospatial big data platform and play a greater role in social public application services and administrative management decision-making.
Highlights
Geographical Information is an important basic and strategic information resource for the country, which involves economic and social development, ecological civilization construction, national security and people's life facilitation
With the development of Big Data, Artificial Intelligence and other technologies, the huge amount of geospatial data generating in the application of geographic information forms the rudimentary form of geospatial big data
Scholars' studies on geospatial big data mainly focus on: Knowledge mining and discovery of geospatial data: academician Li Deren has took the lead in international research on the nature of geospatial data knowledge mining, pioneered the discovery of knowledge from Geographic Information System (GIS) databases, and published the monograph "Spatial Data Mining Theory and Application" in 1995
Summary
Geographical Information is an important basic and strategic information resource for the country, which involves economic and social development, ecological civilization construction, national security and people's life facilitation. Bian Fuling discussed the latest research progress of spatial big data mining from two aspects of platform and algorithm in 2017 Another five attributes except for "5V", including granularity, scope, density, skewness and precision, are summarized regarding geospatial big data (Mir et al, 2018; Pei Tao et al, 2019). Liu Yu believe that multi-source geographic big data provides an unprecedented means of social perception for the distribution pattern, interaction and dynamic evolution of geographical phenomena in 2018. Academicians such as Li Deren and Wang.
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