Design And Implementation Of Visualization System For Land Use Data

Land is an important basis for human activities.Humans need to use land resources to meet material needs such as food,clothing,housing and transportation.In the context of sustainable use of land resources,the research on land use and its trend changes formed under the joint influence of human social activities and natural environment has become a frontier subject of current land use science.Most of the domestic and foreign research on land use change is based on remote sensing image data.Although remote sensing image data has the advantages of high data accuracy,strong timeliness,and rich details,from the perspective of users’ understanding of data,remote sensing data raises the knowledge threshold of data analysis,and the visual expression of data is relatively simple and weak in interaction,which increases the difficulty for users to obtain and understand information.Compared to remote sensing data,the lightweight land use statistics used in this system have the advantages of high data format compatibility and low data update cost,and its flexible data structure can enhance the creativity and expressiveness of data visualization.At present,there is little research on land use statistics in China.The existing land data sharing platform only supports the viewing and downloading of traditional two-dimensional tables for land use statistics,which cannot meet the needs of users for data analysis.Aiming at the above problems,this paper takes the land use statistical data of the second national land survey as the research object,and realizes the visual analysis system of land use statistical data based on B/S structure with the help of visual expression and interactive design technology.The system generally uses Java Script as the core development language.The back-end uses the Koa2 framework to build a web server to provide data interface services for the front-end.The front-end uses the Vue2 framework and combines ECharts and other component libraries to realize the graphical expression of data.The system is divided into six functional modules,among which,the land type introduction,data query,spatio-temporal analysis,and land change modules realize the visual representation of spatio-temporal characteristics and development laws of land use change,and assist users to deeply understand the data characteristics and laws hidden in land use data;the correlation analysis module selects several factors to construct a comprehensive measure of urbanization development level,and conducts correlation analysis with land use data to explain the internal connection between human social and economic activities and land use changes;in the land prediction module,use Small sample time-varying data is used to establish a grey forecasting model to achieve forecasting and analysis of land use change trends.In addition,the system not only provides a chart generation mode based on selection boxes,but also designs dynamic interactive operations based on charts,which greatly improves the human-computer interaction experience.In a word,the land use data visualization system based on B/S structure in this paper provides information services of visual analysis of land use data for ordinary users and land managers,so as to assist users to understand the internal relationship and development law of land use data.