Abstract
The celestial map of the Chunyou(淳祐) stone inscription in Suzhou (蘇小1) and that contained in the Xin yixiang ayao (新儀象法要) , both belonging to the Song (宋) Dynasty, are among the oldest of the extant celestial maps in China. The former has a circular form, and the latter is in two forms, circular and rectangular. I have been wondering which projection methods were used in these star maps, or rather, whether they were ever drawn accurately enough for us to be able to discuss their projection methods. While the stone inscription in Suzhou remains original without any change, we are not sure to which extent the star map in the Xin yixiang fayao maintains its original form, because the text underwent frequent reimpressions.
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