Design And Implementation Of Configuration Map Symbols

The map symbol is the basic language of the GIS map.It is a basic tool for expressing map contents and visualizing geospatial information.With the convergence and development of the Internet of Things and GIS,sensor devices are the basic equipment units in the Internet of Things and are located in every corner of the region.The sensor devices connected to the Internet of Things generally have geographic location information or other related information,so GIS can be used.Therefore,we can use GIS to display its associated information,and continuously upload real-time sensor data to the monitoring system,and the sensor equipment data is managed by means of map symbols.This is the most direct and effective combination of the Internet of Things and geographical information.In the sensor real-time monitoring field SCDADA(Supervisory Control And Data Acquisition),the use of configuration technology to achieve real-time sensor monitoring and control has been quite mature.In the real-time monitoring system based on the configuration method,the design of the graphical interface module is based on the graphic element method.This is similar to the vector symbol element organization of the map symbol.Therefore,the configuration technology in the realtime monitoring field is introduced and integrated.In the process of designing the map symbols,a data model and a logical model of the configuration map symbols are constructed.By analyzing the characteristics of the sensor device data,the sensor data analysis interface is defined,and the mapping rule of the sensor symbol mapping element is created in the script editor,and the change of the visual variable of the map symbol is driven by the change of the sensor device data.The sensor equipment is managed in the form of map symbols,and the data of the collected sensor devices are directly linked with the map symbols to realize the real-time visualization of the sensor equipment data.This thesis mainly proposes the design and implementation of the configuration map symbol.According to the logical model of the configuration map symbol,it develops the configuration map symbol system and designs the configuration map symbol.The designed configuration map symbol was verified in the open source Geotools map platform.After obtaining the server-side sensor device data,it is sent to the map client after parsing the sensor data interface.When the data changes,the map symbol is redrawn according to the configured mapping rule,and the map symbol is real-time visualized by the sensor device data.The experiment proves that it is feasible to integrate the configuration method into the traditional map symbol design.The configuration map symbol editor based on this method can realize the design of configuration map symbols,and the mapping asscociation between the visual variables of map symbols and sensor device data is established.Eventually real time visualization of sensor data based on configuration map symbols can be realized.