Creating Subsets of Data in ArcGIS Pro

You will likely run into occasions when you have a large collection of features, but only want to map or perform analysis on a subset of those features, such as for a particular area.

The primary tool for isolating subsets of vector features is called a definition query. It is also possible to manually select features and isolate them on a separate layer.

This tutorial will cover some means of isolating subsets of data in ArcGIS Pro. The example data is electoral data by county from the Minn 2016 Electoral Counties feature service in the University of Illinois ArcGIS Online organization.

Subsets by Categorical Attributes

You can base a subset on a categorical variable, limiting display to just those features where that categorical variable is equal to a particular value.

For this example, we display only counties in Illinois.

Subset by Categorical Variable

Subsets by Quantitative Ranges

You can also create subsets based on quantitative variables.

For this example, we display only counties with a population greater tha 500,000.

Subset by Quantitative Variable

Subsets by Partial Text Match

You can create subsets based on partial matches of names. This can be useful when names may contain additional text, such as directions (east, west) or unpredictable suffixes like "Road" vs. "Rd."

For this example, we display counties that have the word "Washington" in their name.

Subset by Partial Text Match

Subsets by Multiple Criteria

You can add additional clauses connected with the OR operator to match multiple criteria.

For this example, we display counties that have the word "Washington" or the word "Linconl" in their name.

Subset by Multiple Criteria

Subsets by Drawing Selections

You can subset data by manually drawing selections and creating a new layer from that selection.

For this example, we display selected counties around Chicago, IL.

Selecting Features To a New Layer