FOREST FIRE FIGHTING COMMAND AND DECISION MAKING SYSTEM STUDY BASED ON 3S TECHNOLOGY——TAKE JIAOHE CITY IN JILIN PROVINCE AS AN EXAMPLE

摘要

The forest fire fighting command and decision making system of Jiaohe City in Jilin province is developed out by synthetically using 3S technology. By using 1: 50 000 DEM (digital elevation model) and American ETM satellite image superposition, it fabricates electronic sand plate map of the area, superposes road, stream, reservoir, toponym, inhabited area and other geo-information and guard station, inspection station, watchtower and other forestry infrastructure and connects respective attribute database simultaneously. By using an integrative system of GPS, data transfer and call functions, it can realize forest inventory control, watchman inspecting post, real-time fire control command and measure of distance, area, desquamation excavated volume, intervisibility analyses, flooding analyses, query gradient, slope aspect and other geography parameters as well as localization observation and other three-dimensional analysis functions.