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A new geospatial overlay method for the analysis and visualization of spatial change patterns using object-oriented data modeling concepts

机译:一种新的地理空间叠加方法用于使用面向对象的数据建模概念来分析和可视化空间变化模式

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摘要

Traditional geographic information system (GIS)-overlay routines usually build on relatively simple data models. Topology is – if at all – calculated on the fly for very specific tasks only. If, for example, a change comparison is conducted between two or more polygon layers, the result leads mostly to a complete and also very complex from–to class intersection. A lot of additional processing steps need to be performed to arrive at aggregated and meaningful results. To overcome this problem a new, automated geospatial overlay method in a topologically enabled (multi-scale) framework is presented. The implementation works with polygon and raster layers and uses a multi-scale vector/raster data model developed in the object-based image analysis software eCognition (Trimble Geospatial Imaging, Munich, Germany). Advantages are the use of the software inherent topological relationships in an object-by-object comparison, addressing some of the basic concepts of object-oriented data modeling such as classification, generalization, and aggregation. Results can easily be aggregated to a change-detection layer; change dependencies and the definition of different change classes are interactively possible through the use of a class hierarchy and its inheritance (parent–child class relationships). Implementation is exemplarily shown for a change comparison of CORINE Land Cover data sets. The result is a flexible and transferable solution which is – if parameterized once – fully automated.
机译:传统的地理信息系统(GIS)覆盖例程通常基于相对简单的数据模型。拓扑是(即使有的话)仅针对非常特定的任务而动态计算的。例如,如果在两个或多个多边形图层之间进行了更改比较,则结果大部分会导致一个完整的,甚至非常复杂的从类到类的相交。需要执行许多其他处理步骤才能得出合计且有意义的结果。为了克服这个问题,提出了一种在拓扑启用的(多尺度)框架中的新的自动地理空间覆盖方法。该实现可与多边形和栅格图层配合使用,并使用在基于对象的图像分析软件eCognition(Trimble Geospatial Imaging,慕尼黑,德国)中开发的多尺度矢量/栅格数据模型。优点是在逐个对象的比较中使用软件固有的拓扑关系,从而解决了面向对象的数据建模的一些基本概念,例如分类,泛化和聚合。结果可以轻松汇总到变更检测层;通过使用类层次结构及其继承(父子类关系),可以交互地实现变更依赖关系和不同变更类的定义。示例性地示出了用于CORINE土地覆盖数据集的变化比较的实施方式。结果是一个灵活且可转让的解决方案,该解决方案-如果参数化一次-即可完全自动化。

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