Application of GIS Image System and Remote Sensing Technology in Physical Geography Land Planning

Physical geography is the foundation of urban social and economic development. The quantity and quality of land resources and their distribution directly affect the economic, social, environmental and comprehensive benefits of the city. Now, in our country, low land use efficiency and irrational land structure in physical geography are both prominent phenomena. One of the main reasons is the lack of scientific and reasonable physical geography land use structure and utilization efficiency plan. Using remote sensing and geographic information system technology, this paper conducts a comprehensive and systematic survey of urban land use changes, and obtains land use classification maps for two periods, supports further research, and correctly guides people to develop and utilize natural resources and protect the ecological environment. Provide powerful reference materials for realizing sustainable land use and sustainable social and economic development. Based on the Landsat5TM image data in October 2018 and September 2020, this article is based on the land use remote sensing classification system of the Chinese Academy of Sciences "Chinese Resources and Environment Database" to classify the land use types in the survey area. In addition, this article will also introduce multi-source remote sensing image data fusion technology, including fusion information representation, fusion principle, fusion system framework model, fusion algorithm, control and application. By combining ETM remote sensing data with large-scale topographic maps, using non-remote sensing data and remote sensing data to investigate the status quo of land use and urban environment in physical geography, GIS is used as a supporting tool to construct a spatial database of urban environment, which promotes the development of research.