【摘要】 地下资源开采常常引起周围环境的负面效应,造成地面建筑物、公用地下管线和各种地下设施以及城市道路的路基、路面、铁路等不同程度的损害,利用GIS可以有效地把这种负面效应和损害可视化.在可视化过程中,经常要判断不同地理要素的空间位置关系.基于GIS所特有的拓扑关系特性,把开采沉陷区域的建筑物和沉陷等值线空间位置关系抽象成理论模型,并进一步探讨了点与曲线环关系算法以及利用现有GIS软件如何来实现拓扑关系的方法.通过这种可视化,可以为决策提供可靠的信息依据,从而更好地为工程服务.更多还原

【Abstract】 The underground mining often causes some negative influences about surrounding environment such as large-area surface subsidence,damage on the buildings,public pipelines,underground installations,railway and road surface.The application of GIS will make the above damage and influences visible.During this procedure in production,it is necessary to estimate the spatial location of different geographic elements.The present work abstracts the relationship between subsidence area and subsidence isoline,based on the unique GIS topology,and studies the point-curve topological-arithmetic and topology.The present work provides the dependable information for the determination in engineering practice.更多还原