3S技术在区域地质调查中的应用研究——以西藏纳屋错地区1∶5万区域地质调查为例

摘要

以西藏纳屋错地区1∶5万区域地质调查为例,阐述了在地质调查中综合运用RS、GIS和GPS技术划分地层界线的几种方法.对于地层界线不同类别的野外出露形态,采取差别取舍的办法合理运用3S技术协助划分界线.研究表明,当野外实地界定地层界线遇到困难时可借助遥感影像先行识别,当遥感影像精度欠佳时则由实地勘察确定界线,情况复杂时还常常同时运用3个“S”技术和其他相关地质研究成果综合厘定地层界线.%Taking the 1 : 50 000 regional geological surveying in Nawucuo area, Tibet, this paper discusses the integrated application of RS, GIS, and GPS technologies in determining the stratigraphic boundary in field geological surveying work, believing that when it is difficult to ascertain the stratigraphic boundary in fieldwork because of different appearances in stratigraphic boundary, RS image can be used to help. In some difficult situations three "S" technologies and other geology information may simultaneously be used to fix the stratigraphic boundary.