Search TipsMerging Geometry
Merging geometry: creating multi-geometry
Multi-geometry items are a collection of Point items, LineString items and/or Polygon items. They are created from existing items in the following ways:
- by adding existing items together using Add.
- by editing existing items, using a Boolean method, to produce a new item.
Merging geometry: using Boolean methods
All types of geometry can be merged together using Boolean editing operations to produce new geometric items. Some Boolean methods produce multi-geometry items.
The new item takes on the properties and attributes of the dominant item, so the commands sometimes show a dialog for selecting which item should be dominant.
This does not appear if a choice is not necessary (for instance, if all selected items have the same style, data and height).
The height of the new item is the height of the dominant item (or the height of the dominant item’s origin if the dominant item does not lie on a plane parallel to the XY plane).
Note: For more information on using these commands with LineString or Polygon items, see Editing LineString items and Editing Polygon items.