How & Why County Population is Changing

Counties gain or lose population over time as a result of net migration and/or natural change (births-deaths).

In this section, you will learn to examine how & why county population is changing using iVDA with the "Base" project.

We will use the county and related layers.   See related interactive table.

iVDA is one part of a broader VDA GIS resource framework.  See more about VDA GIS.

In the iVDA frame below, proceed as follows.

In the Legend Panel at the left of the Map Window, scroll down to "Cty Pop Gain 2020-23" layer and check on.

Next check on the  "Cty Pop Loss 2020-23" layer and check on.

The map view now shows a U.S. lower 48 states county thematic pattern view

.. it shows patterns of counties gaining population and losing population

Click on a county of interest to show a demographic profile in the lower left panel revealing annual population and components of change metrics.

Visual Data Analytics Web GIS
iVDA is presented below in an interactive mapping window .. watch video

Below is a static graphic example of using iVDA as described above.