等角条件是使地球面上微分区域内两个方向的夹角投影到平面以后，保持角度不变的条件。这是构成等角投影（或正形投影）的基本条件。
针对这一情况，从石油地质条件、砂体与断层的配置关系、沉积相和地震相特征等角度对洛带和新场气田的含气情况进行了分析。
This paper analyzes the petroleum geology condition and the relationship between the deployment of fault and sand as well as the sedimentary, seismic facies.
本文在介绍了所有等角投影应满足的一般条件的基础上，分别详述了上述三种投影在南极地区的具体应用。
On the basis of the principal qualification for all conformal projections, the application for the above three projections in Antarctica are specified.
从组织机构、道路、人员、车辆等角度研究了建设奥运交通紧急事件管理系统的基础条件。
The bases to develop the Olympic Games' transport emergency management system, such as administrant institution, road, personnel and vehicle are studied.
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