2011

Table Of Contents

For example, you can vary the shade of blue used for parcels, depending on

the assessed property value of each parcel.

Change the color of each parcel based on assessed property value.

You can also use predefined themes, called

ramps (page 1183).

NOTE For information about theming geospatial features, see Theming Features

(page 1168).

Theme Data

A theme for a drawing layer can be based on any of the following:

■ A property of the objects, such as area or length

■ Data stored in an object data table, such as pipe diameters

■ Data stored in a linked external database, such as parcel values

The data used for a theme on a drawing layer can be specific values, such as

pipe material, land use, or pavement type, or a range of values, such as property

value, temperature, or population.

If the data is a set of specific values, select which values you want. For example,

an agricultural theme might show different crops in different colors. Each

crop is a specific value. You can omit some crops.

If the data is ranges of values, select how many ranges you want and how to

divide the data. For example, temperature can be any number along a

continuum. You could divide temperature values into three ranges: below 30,

30 - 60, and over 60.

You can add a legend that lists the conditions of the theme and explains the

colors, symbols, line patterns, shadings, and annotation used.