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中文摘要：
目前，在不同的应用领域地理数据已经成为进行决策的重要信息基础．为了在满足公众对地理数据的共享需求的同时实现对地理数据访问的隐私保护，已经出现了多个空间访问控制模型，但大部分模型没有实现针对地理要素对象的细粒度空间对象访问控制，通过为主体引入位置属性，在授权过程中引入语义属性约束和拓扑关系约束实现了基于地物属性的空间访问控制机制．然后提出了语义属性约束和拓扑关系约束的规则描述方法，并重点分析了复合拓扑关系约束可以出现的约束组合最后，开发了原型系统对该模型进行了验证，说明上述地物对象级的访问控制是可以在有限规则范围内实施的．
英文摘要：
At present, geographic data has become an important information base for decision-making in different application areas. In order to meet the public demand for geographic data sharing as well as achieve privacy protection during data access, there have been multiple spatial access control models, but most of them can not achieve fine-grained access control to geographic feature objects, therefore, a spatial access control model based on attribute constraints is proposed, in which, location attributes are added to users, and attribute constraints （semantic attributes and geometry attributes ） are introduced during the authorization. Then, the method is proposed to enforce semantic attribute constraints and topological relation constraints, and it is focused on analyzing the complex topological constraint combinations. Finally, a prototype system is developed to verify the feasibility of the model within limited rules.
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