Boosting and sorting documents by distance is a common requirement for many spatial applications.
根据距离增强文档和对文档进行排序是许多空间应用程序的常见要求。
The refined calculation of topological relationships is the new requirement of practice and application, which represents the trend of the research on spatial relationship.
拓扑关系的细化计算是生产实践中提出的新的需求，代表了当今空间关系理论研究的趋势。
Mining area as especial geographic area possesses the important and particular requirement to basic establishment, digitalization and visual spatial analysis model of spatial information.
矿区作为一种特殊的地理区域，对空间数据基础设施、数字化、可视化的空间分析模型都具有重要而独特的需求。
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