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Previous: Point in Polygon Overlay
Topological intersection is the process of intersecting multiple polygon layers.In this exercise, you will use theSpatialFilterto set a spatial predicate that will determine which polygon features are merged together.The SpatialFilter compares two sets of features to see if their spatial relationships meet selected test conditions.The features being tested (Candidate features) are identified as having Passed or Failed the test.For example, if you have a roads dataset (lines), and wanted to extract all the roads that passed through parks (polygons), you would direct the roads into the Candidate input port, and the parks into the Filter input port.
注:由于你是一个面向公众的数据库上工作,表可以偶尔被覆盖和/或修改。如果你的翻译会产生意想不到的效果,请参阅Resetting the PostGIS Training Database文章。或者,您也可以下载所提供的文件(S),并用适当的格式的阅读器取代PostGIS的读者。
In this scenario, you want to merge the MountPleasantClipBoundary and Parks polygon features and their attributes based on the spatial predicate: “Filter Intersect Candidate”.In this case, the clip boundary is the filter because you only want to extract the park polygons that intersect the MountPleasantClipBoundary - this will also join the attributes of both features.
在这种情况下,你不必修改任何SpatialFilter的参数作为默认的是空间谓词是“过滤器相交候选人”,并选择合并属性。有关基于空间的更多信息加入变形金刚,看Desktop Basic Course Manual。此外,您可以详细了解每个在空间谓词定义空间关系以及有关的技术细节AreaOnAreaOverlayer在文档。
This will automatically open the joined dataset in the FME Data Inspector after the translation has successfully run.
注:FME支持数SDE和地理数据库读/写器的;然而,这取决于你所运行的平台上。欲了解更多信息,请参阅Comparison of FME readers and writers for SDE and Geodatabase文章。
You have now successfully merged the Parks polygon dataset with the MountPleasantClipBoundary polygon dataset using the spatial predicate "Filter Intersects Candidate".
Data used in this tutorial originates from open data made available by the温哥华市, British Columbia.It contains information licensed under the Open Government License - Vancouver.
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