基于GIS的地质图矢量化技术研究

将传统纸质媒介保存的地质图利用扫描仪转换为栅格图像,只能满足数字化存储的基本要求。要满足在信息化条件下进行地质图建库更新、共享利用与公开发布的要求,必须对地质图进行矢量化。应用现代GIS技术,使用通用的GIS软件平台,通过子图块拼接、几何校正、跟踪矢量化、地理底图标准化、矢量图编辑等过程实现地质图矢量化,对开展各类地勘活动、地学研究具有重要意义。本文结合浙江省地质图矢量化的实践,对利用GIS技术进行地质图矢量化的技术方法进行了阐述。

Study of the Geological Map Vectorization Technique Based on GIS

The geological map of the traditional paper‐based media preservation by a scanner converted to raster image ,can only meet the basic requirements of digital storage .To meet the requirements of geological map database updating ,shared utilization and published in the informatization condition ,must carry on the vectorization of geological map .The application of modern GIS technology ,use the GIS generic software platform ,through the sub block splicing ,geometric correction ,vectorization , geographical base standardization ,vector graph editing process to realize a geological map vectorization ,and it has important significance to carry out various types of geological exploration activities ,research .In this paper ,combined with the practice of Zhejiang Province geological map vectorization ,technical methods of geological map vectorization based on the GIS technology are described .