Merge Layers

Merge Layers tool icon The Merge Layers tool copies two layers to create a single output layer. The tool requires that both layers have the same geometry type (tabular, point, line, or polygon) and the same schema. If time is enabled on one layer, the other layer must also be time enabled and have the same time type (instant or interval).

Workflow diagram

Merge Layers tool diagram workflow


The City of Los Angeles wants to restore the area around the Los Angeles River by developing a new park. The park must be near the Los Angeles River but not within a close proximity to existing parks or toxic release facilities. Buffers around the existing parks and toxic release facilities can be merged into a single layer using the Merge tool to create an exclusion zone where a new park cannot be developed.

Usage notes

  • Two inputs of the same feature type are required (point, line, polygon, or tabular).
  • The two pipelines must have the same schema in order to be merged.
  • The Merge Layers tool can merge pipelines with the same schema that has fields in a different order. However, it is a best practice to only merge pipelines with fields in the same order.


ParameterDescriptionData Type

Input Layer

The point features for which density will be calculated.


Merge With

The point, line, or polygon features or table to merge with the input layer. The merge layer must contain the same feature type and schema as the input layer.


Output layer

The output layer will retain the same schema of the input and merge layers.

Considerations and limitations

  • Input layers may be point, line, or area features, but both must be the same feature type.
  • Input layers must have the same schema.
  • When merging fields with the same name, but different nullable values (nullable can be true or false), the resulting field will be nullable.