采用时空相结合的分类方法来获取多时相土地利用/覆盖,有效减少了多时相遥感的时空不一致性。为探测时空不一致性对景观指标取值及其变化轨迹的影响,将时相独立分类方法和时空相结合分类方法进行了对比,四种常用的景观指标——斑块数(NP)、边缘密度(ED)、平均斑块大小(MPS)和平均形状指数(MSI)用来探测两种方法的差异。结果表明,时空不一致性不仅影响到景观指标取值,而且改变了景观指标的变化轨迹。
In order to minimize the effect of spatio-temporal mismatches on land use spatial pattern analysis,we use a spatio-temporal integrated multi-temporal classification method.To detect the mismatches effects on landscape pattern analysis,we make comparison on landscape metrics derived from maximum likelihood classification and spatio-temporal integrated classification.Four metrics,including NP,ED,MPS and MSI,are used to check the differences on value and temporal trajectory between these two methods.