Analysis on urban vitality elements and model construction

Based on the crucial problem of how to built an attractive urban environment, this article construct a model of urban landscape. The modle described driven mechanism of environmental vitality, according to three interlaced elements which motivate and form a whole vigorious urban landscape. Landscape facilities, as foundamental element, construct a meaningful place; changeable time, as driven element, actuate a sculptural image; and human activity, as promoting element, charge a lasting growth. This three dimention urban vitality modle provides both method of creation and evaluation, according to which the urban environment would be constructed with more vigor.