However in the urban research, TM data is mainly applied to urban expansion urban thermalisland effect and urban greenbelt for the low spatial resolution.
However, Enlargement of the scale of urban accelerates the heat island effect of urban, and the change trend of urban outdoor thermal environment increasingly worry us.
但目前城市规模的扩大，使得城市热岛效应日趋显著，城市户外热环境变化趋势不容乐观。
3
The resource and distribution of thermal energy have objective and direct proof to the analysis the "cold-island effect" and evaluation of the stability of the oasis in middle and small scale areas.