论文部分内容阅读
使用GIS区划了白河林业局森林经营类型,并和原有的森林经营类型进行了比较。在数字化区划的森林经营类型中,二级系统被采纳。首先,白河林业局被区划为林地和非林地,其中,总面积的96%为林地,然后,林地区划为重点公益林,一般公益林和商品林。在重新区划的森林经营类型中,商品林达到总面积的45.0%,是最主要的森林经营类型:重点公益林和一般公益林分别为总面积的21.2%和29.9%。两个区划结果有很大的不同,在数字化区划的森林经营类型中,各类型斑块数量较多,面积较小,这些不同主要由使用数据,区划单位和区划方法的不同引起的。研究表明,GIS在区划森林经营类型时是一种有效的方法,二类数据和其它类型数据的结合是必要的。图2表4参22。
Using GIS, the type of forest management of Baihe Forestry Bureau was divided and compared with the original type of forest management. In the digital division of the forest management type, the secondary system was adopted. First, the Baihe Forestry Bureau is divided into forest land and non-forest land, of which 96% of the total area is forest land. Then, the forest land area is classified as key public welfare forests, general public welfare forests and commercial forests. Among the reclassified forest management types, the commercial forest reaches 45.0% of the total area, which is the most important type of forest management: 21.2% and 29.9% of the key public welfare forests and general public welfare forests respectively. The results of the two divisions are quite different. Among the types of forest management in the digitalized zoning, there are many types of patches of various types and their area is small. These differences are mainly caused by the differences in usage data, zoning units and zoning methods. The research shows that GIS is an effective method to divide forest management types, and the combination of the second type data and other types of data is necessary. Figure 2 Table 4 Reference 22.