多源遥感数据土地覆被空间尺度效应探讨

摘要

This article discussed the spatial effect from the land cover spatial consistency,land cover spatial information transformation and land cover spatial patterns change,respectively,with three scenes high resolution land cover classification map in the same region at the same time which spatial resolution is 2.5 m,10 m and 30 m.Research results show that,the spatial patterns contained in images with different spatial resolution are consistent on the macro.But the boundary,shape and quantity of patches of each land cover types change with spatial resolution.The spatial information transformation tendency is variant from land cover types,which depends the shape,size and spatial distribution of patches of the land cover.With the decrease of spatial resolution,land cover types would gradually become complete and the aspect ratio of patches and complexity of the boundary would gradually decrease.%鉴于目前土地覆被空间尺度效应的探讨大多集中于低空间分辨率数据,而对中高分辨率数据却鲜有研究的情况,基于3景中高分辨率(2.5m、10m和30 m)的同区域同时相遥感数据的土地覆被分类图,从土地覆被空间一致性、土地覆被空间信息转移、土地覆被空间格局变化3方面进行了空间尺度效应探讨.研究表明,不同空间分辨率影像上反映的区域土地覆被空间格局在宏观上是一致的,但构成各个土地覆被类型斑块的边界、形状和数量随着空间分辨率的转换发生了变化;土地覆被类型的空间信息转移趋势取决于构成该土地覆被类型的斑块的形状、大小和空间分布情况;随着空间分辨率的降低,各个土地覆被类型逐渐趋于完整,斑块的狭长程度和边界的复杂程度逐渐降低.