Merge Polygons

Note: Merge Polygons 3D is only available in the OpenCities Map Ultimate edition of this product.

Use this tool to merge all of the selected, closed elements into one. Only the first element selected will retain its properties and annotation. The properties and annotation of the merged elements will be deleted.

To merge multiple elements, add the elements to a selection set prior to using Merge Polygon. All elements in the selection set will be merged. If a selection set is not found, only two elements can be merged.

The Merge Polygon tool has no settings when working in a 2D model. When working in a 2D model, elements to be merged must:

Be in the same feature class
Share one edge or overlap an adjacent element.

Valid closed elements in a 2D model are: Shape, Complex Shape, Ellipse, Group Hole, and 2D polygon collection.

When working in a 3D model, the following must be true to execute the merge:

all elements must be in the same feature class
all elements must be valid
the output is one polygon or one polygon collection

The following tool settings are available in a 3D model:


Target Elements	Specifies which elements to merge. Surfaces - When Non-Planer is disabled, the valid features are coplanar polygons and polygon collections where all of its polygons are coplanar. Features that are not valid are non-coplanar polygons or polygon collections with a non-coplanar polygon. For polygon collections: Merge Polygons will put all elements in the same polygon collection. Two polygons will be merged if they touch each other by an edge and are on the same plane, or if they overlap and are on the same plane. For polygons: Two polygons will be merged only if they are planar and they are on the same plane, and they are overlapping or share at least one edge. Surfaces - When Non-Planer is enabled, the valid features are coplanar and non-coplanar polygons and polygon collections containing planar and non-coplanar polygons. Features that are not valid CityGML. For polygon collections: Merge Polygons will merge all polygons of both collections into a single collection. Two polygons will be merged if they touch each other by an edge or if they overlap and are on the same plane. For polygons: Two polygons will be merged if they share at least and edge and are not crossing and don't overlap, or they overlap and are on the same plane. Volumes - Valid features are watertight polygon collections. Invalid features are polygon collections that are not watertight polygons and CityGML. The resulting collection will be watertight and must not have any surfaces inside the merged collection. In the output collection: Coplanar polygons sharing an edge will be merged into a single polygon. Coplanar polygons that are overlapping will be merged into a single polygon.

Target Elements

Specifies which elements to merge.

Surfaces - When Non-Planer is disabled, the valid features are coplanar polygons and polygon collections where all of its polygons are coplanar. Features that are not valid are non-coplanar polygons or polygon collections with a non-coplanar polygon.
- For polygon collections:
  - Merge Polygons will put all elements in the same polygon collection.
  - Two polygons will be merged if they touch each other by an edge and are on the same plane, or if they overlap and are on the same plane.
- For polygons:
  - Two polygons will be merged only if they are planar and they are on the same plane, and they are overlapping or share at least one edge.
Surfaces - When Non-Planer is enabled, the valid features are coplanar and non-coplanar polygons and polygon collections containing planar and non-coplanar polygons. Features that are not valid CityGML.
- For polygon collections:
  - Merge Polygons will merge all polygons of both collections into a single collection.
  - Two polygons will be merged if they touch each other by an edge or if they overlap and are on the same plane.
- For polygons:
  - Two polygons will be merged if they share at least and edge and are not crossing and don't overlap, or they overlap and are on the same plane.

Volumes - Valid features are watertight polygon collections. Invalid features are polygon collections that are not watertight polygons and CityGML. The resulting collection will be watertight and must not have any surfaces inside the merged collection. In the output collection:
- Coplanar polygons sharing an edge will be merged into a single polygon.
- Coplanar polygons that are overlapping will be merged into a single polygon.

Note: If a merge rule is defined in the feature definition, then that rule will be applied when setting the new polygons properties. See the OpenCities Geospatial Administrator section of this help for details.

Key-ins:

SPLITMERGE MERGE

SPLITMERGE MERGETOOLSETTINGS