The Study On Key Technology Of Forest Monitoring Based On Mobile GIS And Scheduling Of Fire Fighting Equipment

Now, with the advancing of the natural forest protection project and the unceasing enhancement of intelligent requirements for forest, networking and intelligent has become the premise and foundation of the forest enterprises to adapt to new opportunities and face to new challenges, but also an important means of accelerating the modernize forest construction. However, as the most important part of the modernize forest construction, the modernization of the forest monitoring work develops slowly, mainly because of the flaws of large area of forest monitoring, hard supervising to the work staff, and field work. Therefore, researchers have been exploring advanced technology and methods, in order to increase the work efficiency, strengthen supervision and management, and realize real-time data acquisition and rapid transmission. This paper was carried out based on the depth research of mobile GIS system which has the characteristics of GPS satellite positioning, intelligent terminal easy to carry and wireless networks interconnected, so as to realize the Real-time monitoring and digital management of the forest management work.This paper studies and summarizes the research and development status of forest monitoring work at home and abroad, analyzes the current problems of actual work and identifies the application for mobile GIS to forest monitoring work. Besides, for the disadvantages of limited bandwidth and computing power and dependence on the location to the the mobile terminal, and its difficulties for the application to the monitoring work, identifying the study direction and main contents, namely maximum the role of Mobile GIS for the forest monitoring work and realize a variety of location-based spatial information services in the work.The information service on the mobile space is studied and analyzed to determine the information service system for the forest monitoring system. In the mobile communication network, adopt the hybrid communications networks composed by satellite network and wide area cellular networks; in the mobile positioning technology, adopt a hybrid mobile location technology; in the mobile GIS information service pattern, adopt a mixture information service pattern of both offline and online; in the WebGIS implementation strategy, adopt the hybrid strategy composed by client-side policy and server-side policy.In order to maximum the role of Mobile GIS for the forest monitoring work, this paper studies the key technology of vector spatial data compression, spatial data storage and management, spatial data indexing, progressive transmission of spatial data, spatial data cache and the distribution and scheduling of fire fighting equipment, etc. In the vector data compression algorithm, based on the comparative analysis of each algorithm, propose multi- objective optimization based on Douglas-Peucker vector data compression algorithm to find the optimal combination of the vector data compression ratio and the compression errors; In the basis of the analysis of previous studies, the redundant removed dynamic quardtree spatial index algorithm was put forward to realize the spatial data index of mobile GIS; progressive transmission of spatial data and spatial data cache are studied in order to realize the optimization of spatial data transmission and improve the user's query efficiency; The distribution and scheduling of forest rescue mechanical is studied in order to realize the multi-depot multi-objective optimization scheduling of forest fire fighting equipment.For the inspection of the key technology, the system of forest monitoring based on mobile GIS is studied. The system functional and data requirements are analyzed and the system architecture design, functional design and system process design are implemented according to the system requirements, and then the system functions are achieved according to the design of the system. In order to solve the the security problem in the wireless network environment, the related safety strategy of the system were discussed. This system has applied in Tahe forest agency of Hei Longjiang province and attached good results.Through the study on key technology of mobile GIS and fire fighting equipment scheduling facing forest monitoring, the full range of inspection and the digital track management of the administration for the forest resources is realized, to enhance the efficiency of forest administration work greatly and containment of lie, concealing, absenteeism and other phenomena, as well as timely monitor and report the destruction of forests and natural disaster to prevent a huge loss of state assets, result in great economic and social benefits.