Supplement to "Fracture patterns on Mercury revealed by polygonal impact craters"

The geodatabase containing all supplementary materials is called: Mercury_crater_rims.gdb
Within this geodatabase are 15 files representing crater rims per quadrangle. The Geodatabase contains the information of this description and more details on the mapping in its description in the metadata.

Each quadrangle file contains 7 attributes:
Object ID*: This attribute is preassigned by ArcGIS
Shape*: This attribute is preassigned by ArcGIS
ID: Each mapped crater was assigned an ID (after merging all mapped segments of the crater rim) starting with 1 in each quadrangle.
Crater Class: Each mapped crater was assigned a crater class (1 to 5) after Kinczyk et al. (2020). See manuscript for details.
Shape_Length: Defines the length in meters of the entire mapped polyline for the crater calculated as spheroidal length using the Tools for Graphics and Shapes plug in by Jenness Enterprises (http://www.jennessent.com/arcgis/shapes_graphics.htm).
Centroid_X: X coordinate of crater center in decimal degrees
Centroid_Y: Y coordinate of crater center in decimal degrees

包含所有补充材料的地理数据库（Geodatabase）命名为：Mercury_crater_rims.gdb。
该地理数据库内包含15个文件，分别对应每个象限区块（quadrangle）的陨石坑边缘。该地理数据库的元数据（metadata）中包含本说明所述内容，以及更多制图相关细节。
每个象限区块文件包含7个属性字段：
1. Object ID*：该属性由ArcGIS预先分配；
2. Shape*：该属性由ArcGIS预先分配；
3. ID：每个已测绘的陨石坑会被分配一个ID（在合并该陨石坑边缘的所有测绘分段后），每个象限区块内的ID从1开始递增；
4. 陨石坑等级（Crater Class）：参考Kinczyk等人2020年的研究，每个已测绘的陨石坑会被赋予1至5级的陨石坑等级，详细信息请参阅研究手稿；
5. Shape_Length：该字段以米为单位，定义了该陨石坑已测绘的整条折线的长度，其计算采用Jenness Enterprises开发的Tools for Graphics and Shapes插件，以椭球长度为基准，工具链接为http://www.jennessent.com/arcgis/shapes_graphics.htm；
6. 质心X坐标（Centroid_X）：陨石坑中心的X坐标，单位为十进制度；
7. 质心Y坐标（Centroid_Y）：陨石坑中心的Y坐标，单位为十进制度。