介绍DIMAS软件中定位软件的使用方法，阐述方位角确定原理。结合实例给出近震、远震、极远震的定位结果，详细分析定位过程中产生误差的原因和提高定位精度的方法。

Introduction DIMAS software positioning software to use to explain the principle to determine the azimuth. With examples given in recent earthquakes, teleseismic, very far from the earthquake location results, detailed analysis of the positioning process of the causes of errors and improve the positioning accuracy of the method.