中文摘要：

详细介绍了仿射变换的特点。基于三角网的仿射变换方法的流程及优点。该方法能够较好地保证空间数据的质量,尤其是能够保留属性要素和空间要素拓扑关系。

英文摘要：

It is introduced in this paper the characteristics of affine transformation, based on triangular network procedure and advantages. This method can better guarantee the quality of spatial data, and especially preserve the topological relation of attribute elements and spatial elements.