Global Mapper和91卫图软件在地质调查前期工作中的组合应用

在地质工作和测量程度低的地区开展地质调查工作时,由于缺乏基础资料,在工作设计及野外施工等方面极其不方便.本文利用91卫图助手软件免费下载工作区地形和影像数据,使用Global Mapper对该数据进行分析处理,并结合MapGIS软件能快速绘制出调查区的一系列基础图件如地形等值线图、测区沟系图、测区影像图等.在此基础上,使得测区的地质工作路线安排、化探沟系次生晕野外采集点布置更加方便,从而节约了成本,并提高了工作效率.

Combined application of softwares Global Mapper and 91 Weitu in preliminary works of geological survey

During the geological survey of area in which previous geological data and measurement works are insufficient,deficiency of basic data usually leads to difficulties in work design and field exploration works. The authors used software "91 Weitu Zhushou(91 Satellite Imagery Helper)"to download the topographic and image data of the study area which later were analyzed by software "Global Mapper".With the help of software MapGIS,the authors were able to rapidly draw a series of basic maps of the study area,such as the topographic contour map,ravine system map and image map.Based on these maps it is easier to make road-map for geological work and to set up geochemical sampling points of secondary haloin the ravine system with lower cost and higher efficiency.