Research On Visual Expression Of Spatio-temporal Changes Of Land Use

Land use change has a very significant impact on the human living environment and the rational use of land,and is closely related to the sustainable use of natural resources.Therefore,in-depth research on the temporal and spatial changes of land use can provide more resources for the rational allocation of land use resources.Value guidance.At this stage,remote sensing and geographic information technology methods generally adopt continuous land use status maps to compare with each other or use electronic maps to overlap and cross display for the visual expression of land use spatio-temporal changes in a continuous period of time.These visualization methods are in In the expression process,potential information such as the characteristics of temporal and spatial changes in land use,the direction of change and flow,and the future trend of changes are hidden,which cannot enable users to mine and analyze data and information,and also cannot provide intuitive decision-making data for relevant government departments.From the perspective of the visual expression of land-use spatio-temporal changes,this paper studies the visual expression methods and content of land-use spatio-temporal changes.The time-level research mainly includes the visual expression of time point changes and time series changes,and the spatial-level research mainly includes spatial map changes.The visual expression of.It is expected to build a land-use spatio-temporal integrated visual expression platform through user interaction,to dig out the potential information in the land-use spatio-temporal change expression process,present it in a more intuitive and comprehensive way,and provide help and support to relevant researchers.The main research content of this article includes the following parts:In the visual expression of time changes,the designed time point change diagram and time series change diagram reveals the overall trend change and local structural change of land use change along with the time seriesIn the visual expression of spatial change,the symbol structure is hierarchically reorganized on the basis of the current land use symbols,and a set of vectorized land use transfer symbol systems that have the same semantics as the current land use symbols are constructed.Rendering,forming a spatial change map,revealing the spatial distribution pattern of land use.In the visual expression of the integration of time and space,using the theory of computer human-computer interaction,the time change map is used as the target element,and the space change map is used as the connecting element,and the relevant attributes of the changing land are bound to complete the content of time and space changes Spatial connection,and finally through the design of the click query interface,with the help of Arc GIS Engine component library programming to generate the land-use spatio-temporal integration map,realize the integration of land-use spatio-temporal visual expression,and reveal the structure and distribution of land use changes in all directions.