Firstly,this paper gives the theoretical basis of Geographic Tagged Image File Format(GeoTIFF):coordinate spaces and coordinate transformation,and it analyses the extension approach and the structure of 6 GeoTags based on TIFF.

• 剖析了GeoTIFF的坐标空间、坐标转换、存储地理信息的相关途径和6个地理标签之间的关系及含义。