图幅理论面积与图斑椭球面积计算公式及要求-Theory maps the size and area of patch ellipsoid formula and requirements

mapinfo图斑操作使用教程，非常实用，值得参考学习。-the mapinfo polygons operations using the tutorial, very practical, it is also useful to learning.

随机森林算法的一个分类器，对随机森林得到的分类结果进行投票，选择最高概率的类别作为最终的投票结果。使用于土壤图斑分解，精细数字土壤制图。-Random Forest algorithm of a classifier, random forest classification results obtained to vote to choose the highest probability of category as the final voting results. Use polygon

彭周提出的散斑图生成方法，很多文献都对此方法进行了引用。(The method of generating speckle patterns proposed by Peng Zhou)