Common Options

Process

The suppression process to be run. The options displayed in the dialog box will change based on the process selected.

1. Select a process from the drop-down list.

Point Cloud

The input point cloud containing the source points in CSAR format. When the process is run, Selection_State and Selection_Rule bands will be added to this point cloud.

Point Cloud Band

The band within the input point cloud that contains the values to be used in calculations.

Log process information

Create a log file containing the options specified when the process was run. The location of the log file is determined by the Logs setting in Tools > Options > Files and Folders.

1. Click the check box to enable the option.

Suppress Deeper than Areas Options

Feature to Suppress In

The feature file(s) containing areas in which points are to be suppressed. Only areas with elevation attribution are used for suppression. Points with values deeper than these areas are suppressed. The drop-down list is populated with all feature files open in the application.

1. Select a feature file from the drop-down list or click the browse button (...) to launch the Open file dialog box.

2. Navigate to the relevant feature file.

3. Click Open.

Rule Name

The rule name used when classifying points deeper than areas as suppressed. This name will be added as a classification value in the String Table dialog box when launched from the Selection_Rule band.

1. Click the check box to enable the option.

2. Type a name in the field.

Suppress All within Areas Options

Feature to Suppress In

The feature file(s) containing areas in which points are to be suppressed. Points within all areas in the input features are suppressed. The drop-down list is populated with all feature files open in the application.

1. Select a feature file from the drop-down list or click the browse button (...) to launch the Open file dialog box.

2. Navigate to the relevant feature file.

3. Click Open.

Rule Name

The rule name used when classifying points within areas as suppressed. This name will be added as a classification value in the String Table dialog box when launched from the Selection_Rule band.

1. Click the check box to enable the option.

2. Type a name in the field.

Suppress near Features Options

Feature to Suppress Near

The feature file(s) containing areas in which points are to be suppressed. The features in the file(s) are point and line features that will be buffered to become areas and area features that will be buffered to be made larger. Points near these buffered areas are suppressed. The drop-down list is populated with all feature files open in the application.

1. Select a feature file from the drop-down list or click the browse button (...) to launch the Open file dialog box.

2. Navigate to the relevant feature file.

3. Click Open.

Buffer Distance

The distance around features to be considered as part of the features. This distance is usually related to the scale of the chart for which the points are being classified.

1. Enter a value in the field and select a unit of measure.

Map Scale for Buffer Distance

A number specifying the scaling to apply to the buffer distance. If the distance specified represents distance on the ground, then a scale of 1 is used. Otherwise, the map scale representing the distance must be specified. For example, a scale of 1000 would mean that the buffer distance represents a map at 1:1000 scale; the distance would then be a value like 10mm.

1. Enter a scale value in the field.

Rule Name

The rule name used when classifying points near features as suppressed. This name will be added as a classification value in the String Table dialog box when launched from the Selection_Rule band.

1. Click the check box to enable the option.

2. Type a name in the field.

Suppress in or near Features Options

Features to Suppress In/Near

The feature file(s) containing areas in which points are to be suppressed. The features in the file(s) are point and line features that can be buffered to become areas and area features that can be buffered to be made larger. If a suppression threshold is specified, only areas with elevation attribution are used for suppression, otherwise all areas are used. The drop-down list is populated with all feature files open in the application.

1. Select a feature file from the drop-down list or click the browse button (...) to launch the Open file dialog box.

2. Navigate to the relevant feature file.

3. Click Open.

Apply Buffer to Features

Select whether or not a buffer should be applied to the reference features. If a buffer is applied, points near these features are suppressed. If no buffer is applied, points within all areas in the input features are suppressed.

1. Select an option from the drop-down list.

Buffer Distance

If a buffer is being applied, the distance around features to be considered as part of the features. This distance is usually related to the scale of the chart for which the points are being classified.

1. Enter a value in the field and select a unit of measure.

Suppression Threshold

The depth value at which points will be suppressed within the feature areas. If this option is not set, all points inside the features are suppressed. A threshold of 0 will suppress only points deeper than the features. A positive threshold value is used to suppress points that are at least that much deeper than the features. A negative threshold value is used to suppress all points deeper than the features and some points above the features. This criteria is applied based on the selected Z-axis convention, which defaults to down-is-positive. If using the up-is-positive convention, the suppression threshold is reversed.

1. Click the check box to enable the option.

2. Enter a threshold value in the Suppression Threshold field and select a unit of measure.

3. Select the Z-axis Convention to use for classification.

Map Scale for Buffer Distance

A number specifying the scaling to apply to the buffer distance. If the distance specified represents distance on the ground, then a scale of 1 is used. Otherwise, the map scale representing the distance must be specified. For example, a scale of 1000 would mean that the buffer distance represents a map at 1:1000 scale; the distance would then be a value like 10mm.

1. Enter a scale value in the field.

Rule Name for Suppression Near Features

The rule name used when classifying points near features as suppressed. This name will be added as a classification value in the String Table dialog box when launched from the Selection_Rule band.

1. Click the check box to enable the option.

2. Type a name in the field.

Rule Name for Suppression Inside Areas

The rule name used when classifying points inside areas as suppressed. This name will be added as a classification value in the String Table dialog box when launched from the Selection_Rule band.

1. Click the check box to enable the option.

2. Type a name in the field.