http://www.gissky.net- GIS空间站

基于1999年和2009年两期广西贺州市八步区森林资源二类调查小班矢量数据对比分析中出现的因小班大小、形状、面积不同而无法进行空间位置对比分析的问题,引入小班矢量数据格网化的方法,读取地理位置对应点的两期信息,实现同一区域空间位置两期数据的直接对比分析,并根据对比分析差值制出蓄积量变化图,更加直观显示蓄积量空间位置的变化,研究结果对各种森林经营方案的编制与林业生产活动的运作具有指导意义。 更多还原

【Abstract】 In the light of the problems that appeared during the vector date contrasting analysis which was based on the second research on the forest reserves of Hezhou,Guangxi which was did in 1999 and 2009,the differences of small area vector data in size,shape,and area caused the difficulties on space and place contrasting analysis.Through the method of introducing small-class-based vector data,the direct contrasting analysis of the same areas space-place and the two periods date were realized.furtherm... 更多还原