The Investigation Of Forest Resource Base On IRS-6 In Li Xian

From a large amount of information extraction and space policy research methods of remote sensing (RS)supplied powerful image processing technology and geographical information system (GIS) analysis of space capabilities to provide strong support. this article to the Remote Sensing Images from the IRS -6 how to extract useful information for forest resources, "one in charge in the LiXian county forest resources survey as archetypes, Main studied traditional information extraction algorithm based on new technology and information technology to take the strengths and weaknesses, and the IRS -6 remote sensing images. the applicability of the main contents of the study and research for the following :(1) More than one source of space data integration, forest resources survey data provides research support.the thesis summarizes , the IRS -6 Remote Sensing images which scale is 1:50000 for investigation. in history as a reference to forest resources survey data, the 1:10000 standard picture image maps and woodlands for part of the planning data on forests and woodlands resources from the survey. above information must be out of paper on gis data sources, mainly mapgis format, pattern CAD and format shp, And a lack of uniformity, the projection different types of problems, data sources, mainly studied according to data format conversion, the switch and the transformation of the three data integration.(2) traditional information extraction algorithm based on new technology and information extraction strengths and weaknesses of the contrast.Traditional information technology mainly means to extract by eyes can interpret and classified supervision and monitoring, these classification simple, easy to understand, casy to operate, but also lacks practicality, especially in the mountains in the area counties;information extraction algorithm based on new technology and tap in the hierarchical comprehensive system, the spectrum of information classification system, and texture, On the landscape but a type of mountain and the truth, the respective merits and shortcomings and to pay attention to the applicability of remote sensing images and reliability.(3) Forest resources survey results of analysis and evaluation, including the forest area and cumulation of the analysis, the forest quality, structure and distribution and dynamic change.Pay attention to the county level of forestry resources, forestry land on the whole land area of the total of 53%, standing forest stock 2216w cubic metres, the forest coverage is 40.7%, the annual forest resources of the coverage is 30.03%, the forest coverage rate of increase of nearly 10%, and the forest and forest quality has been promoted from the county set, the overall composition of the forestry land along the valley. the primary level up the species and number is reduced. Relatively low altitude berek area, make a forest, woodlands and yong afforestation land and forestry supplementary productivity is relatively high level areas ; in coniferous forests with broad-leaved forest and; high altitude, mainly in coniferous forests and woodlands.From county forest resources for the investigation process and gis and remote sensing and space information technology, with the many general method can not finish the work and save the manpower, financial and material resources, enhancing work efficiency and for investigation and analysis of supply good technical support.