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Restrictions with more than one geometry can be uncombined.
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Uncombining a restriction results in a copy of the restriction being created with a single geometry per restriction entry. If you click Uncombine, a message box will be shown asking you to confirm that you want to uncombine particular restriction.
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BEFORE uncombine - restriction with 2 geometries
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Combine
Multiple individual restrictions can be combined to form a single restriction. Attributes from one of the individual restrictions will be used as the attributes of the combined restriction.