FME Form: 2025.1
Surface
Surfaces are geometries that have a planar area. Surfaces must be 3D (x,y,z).
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                                                                 A face is one example of a surface feature. It is a planar polygon or donut stored as a true 3D feature.  | 
                                                            
                                                                 
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                                                                 Some surfaces contain holes, in much the same way as a donut area.  | 
                                                            
                                                                 
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The boundaries of surfaces are areas.
Simple surfaces are composed of a single component, while composite surfaces may be composed of several surface components.
Surface Attributes
- fme_geometry = fme_aggregate
 - fme_type = fme_surface