Active faults or tectonic lines are clear boundaries between a very active region and a quiet region . 活动断层或构造线是强烈活动已和平静区之间的清晰边界。
Volcano - tectonic line 火山构造线
This system can accomplish effectively many functions through computer such as field terrane - surveying of geology catalog , drawing tectonic lines , building spatial model based on digital image , fast querying of terrane - attribute and figure database , cartography through cad technology and so on 此系统有效实现了在计算机上完成地质编录的外业产状量测,构造线素描,普通影像的空间建模,岩层产状属性、图像数据库快速查询及cad成图等等功能。