Summarize Center and Dispersion

Summarize Center and Dispersion


This tool finds central features and directional distributions. It can be used to answer questions such as:

If Use current map extent is checked, only the features in the input layer visible within the current map extent will be analyzed. If unchecked, all features in the input layer will be analyzed, even if they are outside the current map extent.

Choose a layer to be described


The point, line, or area layer that will be used to find central features and directional distributions.

Summary types


The method of summarizing center and dispersion.

  • Central feature - Identifies the most centrally located feature in a dataset.
  • Mean center - Identifies the geographic center (or the center of concentration) for a set of features.
  • Median center - Identifies the location that minimizes overall Euclidean distance to the features in a dataset.
  • Ellipse - Creates standard deviational ellipses to summarize the spatial characteristics of geographic features: central tendency, dispersion, and directional trends. The ellipses can be sized as 1, 2, or 3 standard deviations.

Weight by (optional)


The field used to weight locations according to their relative importance.

Group by (optional)


The field used to group features for separate computations of central features or dispersion.

Result layer name


This is the name of the layer that will be created in My Content and added to the map. The default name is based on the tool name and the input layer name. If the layer name already exists, you will be prompted to provide another name.

Using the Save result in drop-down menu, you can specify the name of a folder in My Content where the result will be saved.