西藏矿产资源潜力评价遥感专题中典型问题初探

西藏矿产资源潜力评价项目遥感专题通过提取各1:25万标准图幅及全区遥感异常信息和编制遥感推断地质构造图,为项目地质背景编图、成矿规律研究和矿产资源预测提供了基础性图件.因西藏全区面积广阔、涉及的遥感图像时相各异、图像处理软件及方法流程复杂,加之技术人员专业背景和经验等差异,在遥感专题实施中出现了4个典型问题:①对基准面...

A Preliminary Discussion on Typical Problems in the Remote Sensing Project of Tibetan Mineral Resources Potential Evaluation

The main purpose of the mineral resources potential assessment research based on the remote sensing method in Tibetan region is to extract abnormal remotely sensed information， make several kinds of geological maps，and provide basic maps and data for other cooperating research groups. Four typical problems have appeared in the project because of vast area， multi-temporal remote sensing images，too much software，complex processes and technical differences in technicians’ professional background and experience. The first problem is the incorrect understanding of the datum and map projection and the ignoring of the remote sensing image map projection distortion； the second problem is deleting too much or too little interference information and incomplete spatial topological relations during the anomaly information extraction； the third problem is the inappropriate strategy of remote sensing image mosaicking and color balancing； the fourth problem is low accuracy in the interpretation of geological features of mineral resources. Focused on these four problems，this paper proposed a practical solution which ensures the successful completion of the remote sensing project.