居民地增量更新中方向一致性评价方法研究

Research on the Approach for Evaluating the Consistency of Direction Relations in Settlement Incremental Updating

空间数据的一致性是评价数据质量的重要体现,对空间数据的可用性具有重要影响。针对居民地增量更新中的方向一致性问题,从增量更新只引起局部变化的特点,确定了评价的范围,建立了方向一致性评价模型。在更新数据与源数据中对应方向关系相似性计算的基础上,从方向不一致、方向整体相似度和稳定度3个方面,对更新数据的方向关系一致性进行了评价。实验表明,该评价方法不仅能够有效地检测出增量更新过程中一些错误的方向关系,而且能够对更新数据的方向一致性状况进行全面详细的描述,评价方法合理、实用。

Consistency is an important aspect to evaluate the quality of updated spatial data, and it has a significant impact on the availability of data. As to the consistency of direction relations in settlement incremental updating,the scope of the evaluation was defined according to the character that only local was changed in the process of settlement incremental updating and the model for evaluating directional consistency was built. Based on the computing of similarity between direction relations in updated data and corresponded in source data, evaluation was conducted from three aspects： inconsistencies, the overall similarity of direction relation and stability of consistency.Test illustrated that the approach not only can effectively and practically detect the mistakes of direction relation in updating process, but also can describe the consistency of direction relation of updated spatial data in detail and comprehensively.