Scale constraint is a basic rule of the surface complex system on earth. For environmental impact assessment( EIA),scale constraint is hid in the experience of EIA professionals,or scattered among EIA technical guidelines; it is not a large concern for EIA professionals. This paper discusses the scale constraints of environmental impact,EIA,and the EIA technical frame. Results show that scale constraint of environmental impact responds to the hierarchical structures of human activities,environmental element...
may vary flexibly from large to small,while their resolutions may change from coarse to fine.尺度是自然界一切存在的度量,尺度问题就是尺度大小影响研究结果,如1934年发现的可塑性面积单位问题(Modified Area Unit Problem MAUP)即人口统计结果与相关联的空间面积单位?