A theme varies the display
of individual features based on data values. For example, if you
theme by parcel value, less expensive parcels can be a lighter color
while more expensive ones are a darker shade.
In this exercise, you
create a theme based on the calculated property you defined for
To create a theme using a calculated
- In Display Manager,
select the Parcels layer and click Style.
- In the Style Editor,
click New Theme.
- In the Theme Polygons dialog
box, for Property, select ValueByArea.
- For Distribution,
select Jenks (Natural Breaks).
The Jenks distribution
method groups ranges of features at their natural breaks so that
features with similar values are grouped. This method shows the
natural groupings in the data, rather than creating arbitrary breaking points.
- Under Theme The Polygons,
click next to Style
Range and set the foreground color range to any two colors.
Range is a gradient between two colors you specify.
- Click OK twice
to return to the Style Editor.
Leave the Style
Editor open for the next exercise.
To continue this tutorial,
go to Exercise 2: Add labels that use an expression.