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加拿大的森林资源清查大多是用来获取某一特定时点上的森林资源信息,即静态信息。近年来,已趋向获取有关森林资源时间变化的信息。获取有关时间变化信息的可能途径之一,就是比较森林资源连续(静态)清查数据。但是按照本文所论述的,这些变化常常是由于不同的调查方法和程序所造成的。既然森林资源的实际变化可能受一些人为因素差异的影响,那么在未掌握详细的背景知识条件下,这样的比较是不可信的,而且也是不必要的。
Most of the forest inventory in Canada is used to obtain the forest resources information at a specific point, namely static information. In recent years, there has been a trend towards obtaining information on the temporal changes in forest resources. One of the possible ways to obtain information about the change over time is to compare continuous (static) inventory of forest resources. However, as discussed in this article, these changes are often caused by different survey methods and procedures. Since the actual changes in forest resources may be affected by some differences in human factors, such comparisons are not credible and unnecessary even without detailed background information.