You'll use a numeric ID for your artists just to make it easy to reference them.
您将对艺术家设置一个数值 ID 以方便引用。
2
In the terminology of the Spatial Extender, this is the Spatial Reference system (SRS), a combination of an earth-based coordinate system and a set of numeric conversion parameters.
在Spatial extender术语中，这是Spatial Reference System (SRS)，它组合了基于地球的坐标系和一组数字转换参数。
3
Of course, an API that only let you reference sites with numeric values would be pretty limited.