![]() ![]() Lists are powerful FME constructions but a bit tricky so I'd recommend checking out and (esp the ListIndexer) as you rename your "list" values into "regular" ones for output to Shape. Of course, now that you have this list, you'll need to rename the parts of it into normal attribute names so that you can write to shape. You do this by turning on the List section in the AreaOnAreaOverlayer: If that is the case, then you need to generate a "list" to hold all the values of the same attribute name that will accumulate in the overlapped area. it sounds like you're reading just one table in and overlaying it on itself. The result of this combination is a new data set that identifies the spatial relationships. I think once you've got that turned on, you'll have what you want.īut now that I reread this, are the names of the attributes all the same i.e. together separate data sets that share all or part of the same area. I think you've pretty much got it, except you need to ensure the settings on your AreaOnAreaOverlayer for Attribute Handling are set to merge all incoming: I am essentially trying to recreate the Union tool. Just wondering what I am doing wrong - I am familiar with Esri products but have little experience using FME. For example, if I read in "Red" and "Blue", the output will say "Red" with two overlaps, but won't mention the name of the other polygon ("Blue"). However, I can't figure out how to get the attribute table to say which polygons it is that are actually overlapping. The huge 21,000-acre Clinton Devon Estates in the West Country. When I run this, it does shows me the correct shape polygon where the overlap is. I have tried using the AreaOnAreaOverlayer with a Tester set to _overlap>1. I plan to use this workbench frequently in the future, so that each time I receive a new polygon, I can run it through the workbench and see which existing polygons it overlaps with. Namely, I would like to know where the polygons overlap, export this overlap area as a shapefile, and have the attributes of the new shapefile contain all information from both/all polygons which overlap. I would like to use FME to compare multiple polygons from a geodatabase. ![]()
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