关键词: 地测系统, 粗糙集, 数据挖掘, 决策

Abstract: The geological and surveying system involves extremely complicated factors，where there are a great deal of data properties.Therefore，deficiencies inevitably exist in the data，which affect the subsequent design，production and management.Based on the rough set theory，and by analyzing the geological and surveying data，a model was built，from where the uncertain knowledge and abnormal data were discovered，and the noise interference was eliminated during the knowledge discovery process，the rough set was used to get the geological and surveying data to find out the hidden knowledge from the testing data，which plays a practical role in predictive analysis and decision-making support for the mine production and management.

Key words: Geological and surveying system, Rough set, Data mining, Decision-making