根据空间数据误差理论，对空间数据误差来源和种类、空间数据的质量要素等进行地了研究。

The error sources, types and elements affecting the quality of the spatial soil conservation data has been analyzed, by the view of the error and quality of spatial data.

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其次，了解每项工作的操作流程，包含的数据种类和数据类型以及处理方法、数据的来源和流向。

Secondly, find out about the operation flow of each job, the data kind and data type and the sources of treatment method, data and flowing into included.

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林业资源信息具有数据量大、种类多、来源广、结构复杂和获取成本高等特点。

The characteristics of forestry resource information are large Numbers of data, much categories, wide sources, complicated structure, and high cost for obtaining.

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