Search Feature Types

Type a search term or phrase to search for a specific feature type. The list of feature types will be limited to only those that match the search term. Click the X button to clear the search term and display the full list.

Command tools

Filter the list of feature types based on the feature format.

Only features of the selected format will be displayed in the list.

Feature type list

All available feature types in the selected layer. Click the check box to include a feature type in the filter expression.

Graphical

Feature Types

The feature types to include in the filtered layer. This list contains all feature object acronyms in the catalogue of the source data.

1. Click the check boxes to select one or more feature types.

Attributes

The attributes that can be used in the filter expression.

This list contains the attributes of the selected feature type. If multiple feature types are selected, only attributes that are common are listed.

If the list is extensive, use the Search Attributes field to limit the attributes displayed. Type the attributes of interest. Click the X button toe clear the search and display the full list.

A set of functions is used to determine how the filter expression is applied. Not all functions are available for all feature types. Some functions are:

• BBOX: Bounding box. Apply the filter to all data within a set of coordinate extents.

• NOT: Apply the filter to all data that does not meet the specified criteria.

• ID: Apply the filter to all data with a specified feature object IDs.

Expression map

View and build an expression map, which is a graphical representation of the filter expression.

To add items to the filter expression, double-click an item in the Attributes list or click and drag an item from the list to the Expression map. To add a second item, double-click it or drag and drop it on top of the first item.

A bubble is added to the map for each item selected.

As items are added, additional bubbles are displayed and operators are inserted between the bubbles.

Properties

The properties for the selected bubble or operator in the Expression map.

These properties define the attribute values for the filter expression. Some properties have lists of values from which you can select, others require you to type a value. For operators, you can choose between AND and OR.

1. Select a bubble or operator in the expression map.

2. Define the properties as required.

Advanced

Feature Types

The feature types to include in the filtered layer. This list contains all feature object acronyms in the catalogue of the source data.

1. Click the check boxes to select one or more feature types.

Expression statement

View and build a a filter expression as text.

When you type in the statement field, auto-complete lists are displayed if you type a function, attribute, or operator.

As the expression is built, the list will change to reflect the current state of the expression and the location of the cursor in the statement.

The syntax of the expression is validated as it is built. If the expression area has a red border, there is an error in the syntax; If the border is green, the expression is valid.

Save As

Save the current filter expression as a .filter file for future use.

1. Click Save As.

2. Specify a name and location for the file.

3. Click Save.

Load

Load a previously saved .filter file to edit and/or apply the filter expression to the current source data. The list beside the button provides a list of recently used files.

1. Select file from the list or click Load and navigate to an existing file.

2. Alter the expression if necessary.

3. Click OK to apply it.