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本文介绍一种进行极密统计的BASIC程序。利用该程序,除了能得到极密图之外,还能得到一系列数量化的结果。包括各极密的平均产状、各极密中的极点数及所占的百分比,还有一个衡量极密集中程度的参数——分散度。这些结果的获得,使极密的统计和评价从定性进入定量阶段。对于等面积投影公式,文中给出了一种新的推导方法。这种方法比何作霖(1965)介绍的推导方法更为直观和易于理解。程序的通用性强,使用步骤简单,便于普及应用。
This article describes a very dense statistics BASIC program. Using this program, in addition to getting a very dense map, you can also get a series of quantitative results. Including the extremely dense average shape, the number of poles in each very dense and its percentage, as well as a measure of very high degree of concentration - dispersion. The availability of these results allows qualitative and quantitative quotas of extremely dense statistics and evaluations. For equal area projection formula, a new derivation method is given in this paper. This method is more intuitive and understandable than the derivation method described by He Zuolin (1965). The versatility of the program, the use of simple steps, easy to popularize the application.