Research And Development Of Stand Environmental Factors Monitoring Data Management System

Combination of depth of information and forestry, information technology has been widely used in all aspects of the forestry. Faced with the problems and new requirements of the stand environmental factors monitoring data management, this study reviews the present situation of this subject,studys key technologies related to the system, and develops a new system, in order to provide integrated services for forestry researchers, give full play to the value of the stand environmental factors and help forestry researchers management and decision-making.The study analyzed stand environmental factors and sensing element, compared the development technology of dynamic web station, development framework, data transmission technology, data visualization technology and WebGIS development technology. The study designs the system framework, function modules and database. On the server side, useing the Codelgniter framework based on PHP and MySQL, making system stability, development speed and run faster. View layer is responsible for user interaction. The controller deals with the business logic. Model is responsible for database operations include create, update, delete and select. The application of Codelgniter framework improves the reusability of the code, the efficiency of development and maintainability. Clients use AJAX, polling technology call to the server to speed up the server response and ensure the data real time. In the implementation process of graph presentation, using ECharts technology making the Web interface beautiful, good interactive and users can get the changes of the stand environmental factors data vivid. Baidu API technology has been used to load maps and mark the monitoring points. Not only using Codelgniter framework to enhance the security of the system, but also using MD5 technology to set password to prevent malicious landing.In a word, through comprehensive application of technologies above, the system realizes the monitoring points management, querying real-time data, setting the threshold of the data, alerting anomalous data, querying and counting stand environmental factors data, showing the query in graphical and tabular form and exporting the query as an Excel spreadsheet.There are some features in the system:displaying multiple data within the same coordinate system, calculating stand environmental factors minimum or maximum or mean that displays in graphical and tabular for, and having good expansibility that system is not limited to the number of monitoring sites and the types of monitoring data.