Use to add up to 4 horizontal ordinate dimensions. Attach one endpoint to baseline and one to first feature.
用于添加多达4个水平坐标尺寸。将一个端点连接到基准线，一个端点连接到第一个部件。
2
The baseline vectors are solved with software GAMIT and the space coordinates determined with 3-d adjustment model. Horizontal coordinates are adjusted under different conditions.