Ancient Conical Sundial Measurements

**ConicalSundialsMeasurements.json** describes the dimensions of the corpus and cone of ancient conical sundials with 3D-models which are cataloged in the repository of the Berlin Ancient Sundials Project (http://repository.edition-topoi.org/collection/BSDP). The dimensions were measured from the 3D-models in that collection. Besides, the database lists distances and angles of construction points (i.e., the shortest distance between the cone apex and the day curves). They were relevant to validate the geographical location for which the sundial was crafted, and derived values for the ratio between gnomon size and shadow length (g,s).ConicalSundialsMeasurements.json 记录了已收录于柏林古代日晷项目（Berlin Ancient Sundials Project）典藏库（http://repository.edition-topoi.org/collection/BSDP）的、搭载三维模型（3D-models）的古代锥形日晷的本体与锥形体尺寸。所有尺寸参数均从该典藏库中的三维模型实测获得。此外，该数据库还收录了各结构点的间距与角度参数——即锥顶与日影轨迹曲线之间的最短距离。这些参数可用于验证该日晷制作时所适配的地理纬度，同时可推导出晷针长度与影长的比值（g,s）。