为了量化城市土地利用程度和开发密度，对研究区基于子像元的非渗透表面丰度进行了分类。
To quantitatively determine urban land use extents and development densities, sub-pixel impervious surface areas were mapped for this area.
结果表明，开发区土地利用集约度较高，扩区需求较强烈。
The results showed the land utility intensive level of Huadu district was high, and the requirement of expanding zone was strong.
结果表明，开发区土地利用集约度较高，扩区需求较强烈。
The results showed the land utility intensive level of Huadu district was high, and the requirement of expanding zone was strong.
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