Graphical Filter Manager

Used to create the individual filters for individual terrain features, then combine them into a filter group.

You can access this tool from the following:

Ribbon: Terrain > Miscellaneous

Creating Filter Groups with the Graphical Filter Manager

The Manager can be accessed from within the Create Terrain by Graphical Filter tool or directly from the Graphical Filter Group tool located in the Terrain Model Miscellaneous tool group. The general workflow for setting up filter groups is to create the individual filters for individual terrain features, then combine them into a filter group. For example, perhaps a common dataset might consist of points and break lines using the levels points and breaks respectively. Create a feature for points and a feature for break lines, then combine into a filter group and assign a meaningful name so it's easy to tell its contents. Perhaps another group might have all the features. Keep in mind you can use a filter group that has more filters than you have in your data. If no data is found for a particular filter, the filter is just ignored.

Create a Filter

Select the Create a Filter from the icons at the top of the dialog or right-click on Graphical Filters and select Create a Filter. A line named "New Filter" is added to the hierarchy. You can rename this to something appropriate at any time.
Highlight the filter just created, and note the right pane of the dialog has the Properties pane with General and Filter By Sections.

General

Here you will specify how little or how much data to use in order to utilize it within the TM creation. For example, it may be as simple as specifying a level. Or you may want to specify level, color, or other MicroStation attributes. Select enough information to make it a filter unique from other elements in the file.

Settings	Description
Name	Brief, unique name to identify the filter.
Description	Optional description to further identify the filter (if the Name is insufficient).
Feature Type	Select the feature that corresponds to your data type. See also Features.
Filter Type
Edit Filter	Opens the Edit Filter dialog, wherein you set the parameters for the filter, i.e., levels, colors, civil features, etcetera. Set the parameters by clicking the category to the left, then selecting the parameters. Define a selection set, select the category, then click By Sel. The software autopopulates the fields, based on the elements in the selection set. Multiple selections are supported (Choose six colors or five levels, etcetera.) To view how many elements match the filter, click Preview. All elements in the view that fit the filter are highlighted. Once setting the parameters is complete, click Finish to close the editor and return to the Filter Manager dialog.

Filter By

The Filter By section displays at a glance which categories are being specified in the current filter. For example, if you used level and color to define the filter, the level and color items are toggled on, once the filter is finished.

Refer to the MicroStation help topic for more information on levels, color, line weight, line style, and other element attributes.

Refer to the MicroStation Other Element Attributes help topic for more information on Transparency.

Refer to the MicroStation Other Element Attributes help topic for more information on Element Template.

For Cell Names, highlight the cell and click Add -> to add to the list. Multiple cells can be selected at one time. To remove, highlight the cell in the left list and click <- Remove. All or None options are supported to add or remove entire lists.

For Civil Features, highlight the civil feature and click Add -> to add to the list. Multiple features can be selected at one time. To remove, highlight the feature in the left list and click <- Remove. All or None options are supported to add or remove entire lists.

The Elevations option is useful to remove data outside the range of interest. For example, data may have 0 elevation data that would skew the terrain model. Specific values (such as 0) can be excluded or an elevation range can be excluded. Note this is exclusion, not inclusion.

Create a Filter Group

Once you have created a minimum of one filter, you can create a filter group. The general workflow is:

Highlight Graphical Filter Groups, right-click and select New Graphical Filter group. A line is added to the hierarchy which can be renamed at any time. You can also add an optional description. Keep in mind the Name is what is displayed in the Create Terrain by Filter Group tool.
Click Filters to open the Select Filter dialog. The left pane displays all filters currently defined.
Highlight the filters to include in the group (in the left pane) and click Add. The filters are moved to the right pane. If you add one by mistake, highlight the filter in the right pane, and click Remove.
When the desired filters are selected, click OK to close the dialog and create the filter group. Note a filter can belong to numerous filter groups.

Graphical Manager Toolbar

Several tools are located at the top of the dialog for easy access:

Settings	Description
Create Graphical Filter Group	Creates an empty graphical filter group.
Create Graphical Filter	Creates an empty graphical filter.
Create Filter from Selection Set	Select a design file element from active or reference file and this command uses the symbology to fill in the attributes in the filter.
Copy	Adds filter or group to clip board for paste command.
Paste	Adds entry from clipboard to list, if the name exists a numeral 1 or greater is added, enter new name or rename later.
Delete	Deletes the entry.
Preview	Places all the elements that pass the filter into highlight.
Clear Preview	Removes all the highlight from elements previewed.

Properties

The mode for properties changes according to the active selection in the tree view to provide the top level properties for Filters or Filter Groups.

Common properties

Name - User definable description must be unique in current DGN.
Description - User definable description.

Filter Group Properties

Add or Remove Filters - allows selection of available filters.

Filter Properties

Feature Type - predefined Terrain Feature Type list.
Filter Type - non editable.
Edit Filter - opens a Separate Dialogue for Element Properties.
Filter By - allows high level selection of properties defined in the Filter to be used.
Edit Filter - opens the Edit Filter dialogue.

Edit Filter

The form lists Element Selection modes in the left hand view, available property information and the Selected Types. When adding by Selection all properties are loaded as active making the Filter very selective and specific for that selection. Multiple selections can be made in any filter.

Example

The Level - Road may contain multiple features that use different Linetypes for Edge of Pavement and Centerline. If each feature needs to manage each separately they will require specific Filters to define then based on unique properties - in this case Linetype. However, if treated as unfeaturized breaklines then the selection could be based on the Level only.