利用图解建模分析方法建立一套沟壑密度提取分析空间数据模型，对沟壑密度的快速提取提供了一套全新的解决方案。

It built a spatial data model of getting ravine density with the method of illustrate modeling analysis, which provided the fire-new solution for extracting ravine density fleetly.

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系统研究了七种典型的空间数据聚类方法，积极探索基于约束条件的空间聚类问题的解决方案；

Seven kinds of spatial data clustering approaches are studied. And the technique to solve the problem of Constraint-based Spatial Cluster Analysis is explored.

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该解决方案通过建立统一的数据模型，使用元数据与多数据库系统实现了对分布的异构的空间数据的统一访问请求服务。

Based on the unified data modeling, this resolution realizes the uniform request service to distributed heterogeneous spatial data by metadata and multi-database system.

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