Find Component Geographies (Subgeography)

Overview

Component Geographies are boundaries selected within larger boundaries, for example, block groups inside a drive-time boundary.

Some examples include:

Find Component Geographies

Calculating Ratios

The Find Component Geographies tool gives you the option to calculate the statistical ratios of the underlying geographies. For example, you create component geographies of all ZIP Codes within a county. You can use the Calculate Ratios option to determine what percentage of ZIP Codes exists within the county boundary. Ratios for population, households, housing units, business counts, and general area can be generated. The ratio output appears in the trade area attribute table.

You can calculate ratios in the following ways:

The attribute table containing ratios will look similar to the one below:

Find Component Geographies Attributes
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Component geographies can be created using these different selection methods:

  • Interest
  • Centroid Within
  • Completely Within

Learn more about Find Component Geographies (Subgeography).


9/16/2010