2011

A theme showing roads themed by type
NOTE For information about theming drawing objects, see Overview of Theming
Drawing Data
(page 1178).
Theme Rules
A theme for a feature layer has a set of scale ranges and a rule that corresponds
to each one. For example, if you are theming by parcel size, the scale ranges
would indicate different parcel sizes. The first range might comprise parcels
between 1000 square feet and 5000 square feet, the second range might
comprise parcels 5001 square feet to 10,000 square feet, and so on. The first
rule would describe how the first range appears on the map. For example, the
smallest parcels might be lightest in color, and the colors might get darker as
the parcel size goes up.
Rules can include a visual style, a legend label, and a feature label.
■ Visual style options vary, depending on the type of geometry on the layer.
Polygon style options include fill and border options; line style options
include line thickness, color, and pattern; point style options include a
symbol, size specifications, and color.
■ Legend labels can provide a description of the condition of a rule. For
example, you can edit the default legend label so it reads “Small parcels,”
instead of “1000...2000.”
1166 | Chapter 8 Analyzing Data