The same message is returned if a group contains multipatches that share no volume or space.Īn optional table can be created to identify the attributes of the source features that were unioned to create each unioned output.
Use caution when deciding how many features to aggregate, as very large and complex features may be created in the output feature class which may exhibit poor display performance.Ī warning stating that the resulting feature is not simple and could not be created is raised if two or more multipatch features share only an edge or a vertex. Optimization can also be disabled in the absence of a grouping field if the desired output is to union all overlapping features into a single multipatch. Disabling optimization can increase the tool's performance if a grouping field has been specified. When optimization is enabled, the tool attempts to automatically subset theįeatures into groups by analyzing the bounding box for each feature. Rather than comparing a feature against all features, it is only compared against those that participate in its group. This can significantly improve performance by reducing the number of times the tool must iterate through the dataset. This process occurs iteratively until all multipatch features in the feature class have been processed.Ī grouping field can be used to identify features to be unioned, such as when the multipatches represent building parts in a city where multiple features represent one building. Multipatch features encompassing overlapping volumes are combined by intersecting the triangles and rings that constitute the shells of the features and removing redundant interior portions. The Is Closed 3D tool can be used to determine if a multipatch feature class contains closed features, and the Enclose Multipatch tool can be used to eliminate gaps in multipatch features. Contain_ID-Identifies the unique ID of the multipatch that intersects the input features are inside or partially inside.Closed multipatch geometry is required for this analysis.Status-Indicates if the feature identified by the Target_ID field is inside or partially inside a multipatch.Target_ID-The unique ID of the input feature.The following fields are present in the output table: A feature may fall within multiple closed multipatch features and have multiple entries in the output table. If the Complex Output Table option is selected, a record is created for each multipatch that a given input feature intersects. If field based height measurements are present in a 2D feature class, the Feature To 3D By Attribute tool can be used to create a 3D feature class.Ĭlosed multipatch geometry is required for this analysis. All input features must have Z information stored as part of their geometry.
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