Thematic Item Window Tabs and Sample Values

The Thematic Item window has the following tabs:

Unique value thematic

Use this tab to display objects having a selected attribute with the identical values as the values introduced in the Value field.

Sample Values

Layer	States	Rivers
Attribute for classification	Name	RIVER_NAME
Value	California	Missouri
Label	CA	MyRiver
Style	Areal	Linear

Range thematic

Use this tab to display objects having a selected attribute value within the values introduced in the range described by the Begin Value and End Value fields.

Sample Values

Layer	Counties	Interstates
Attribute for classification	Population	ROUTE_NUMBER
Begin Value	5000	5
End Value	10000	40
Label	PopulationRange	RouteRange
Style	Areal	Linear

User defined

If you are an advanced user, use this tab to edit expressions retrieved from Unique value thematic and Range thematic (in this case, you can edit the expressions from the last-selected tab) or create a new expression manually (according to the syntax of the selected WFS).

Sample Values

Layer	States
Attribute for classification	Name
Value	California
Label	CA
Style	Areal

The expression field has the following structure:

Expression1: '[{http://www.intergraph.com/geomedia/gml}Name]' == 'California'

In this case, attribute values or operators can be modified, as in the following example:

Expression2: '[{http://www.intergraph.com/geomedia/gml}Name]' != 'California',

Produces the opposite result on the map from Expression1.

Generally, expressions have the following format:

‘AttributeName1’ operator1 ‘Attribute1Value’ operator2

‘AttributeName2’ operator3 ‘Attribute2Value’ operator4

‘AttributeName3’ operator5 ‘Attribute3Value’ operator6

…

‘AttributeNameN’ operatorM ‘AttributeNValue’.

Sample operators can be ==, !=, &&,||, and so forth.