CARIS HPD : Command Reference : C : Create Layer by Classification
 

Create Layer by Classification

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Add Layer(s) > Classification (Layers window)

Create layers based on the values of an attribute in a data source.

Classification can be used with several vector formats, such as Shapefiles, GML, GeoPackage, AutoCAD and CARIS DES. It also works with database object layers. It is not compatible with HOB and S-57 ENC data.

Layers are generated based on a classification type and an interval. You can set colours and patterns to let data values be quickly identified in the display.

A group is created and the generated layers are added to it.

The layers are named based on the attribute and the range of values.

Interface

Option

Description

Name

The name for the group that will contain the classification layers.

Classification Type

The type of classification rule to apply. The choices are:

• Number of values: Create a classification layer for each set number of attribute values in the data source. This is suitable for values in string, enumerated list, or integer format. A value of 1 will create a classification for each value in the data.

• Equal interval: Create a classification layer for every value interval, for example, every 10m. This is suitable for numeric values.

• Defined Interval: Create a set number of classifications. The interval is calculated based on the number of classifications desired and the range of the data. This is suitable for numeric values.

General

Attribute

The attribute on which the classifications are based.

Available attributes are taken from the catalogue of the layer for which classifications are being created.

Number of Values/Interval Size/Number of Classes

The interval at which to create classifications. The name of this field will change based on the selected Classification Type.

Display

Colour Symbols

The colour map to apply to symbols in each of the classification layers.

1. Click the check box to enable the option.

2. Select a colour map from the list.

Colour Lines

The colour map to apply to lines in each of the classification layers.

1. Click the check box to enable the option.

2. Select a colour map from the list.

Fill Polygons

The colour map to apply topolygons in each of the classification layers.

1. Click the check box to enable the option.

2. Select an colour map from the list.

Hatch Style

The hatch style to apply to the objects in the classification layers.

1. Click the check box of each hatch style to be applied.

Hatch Colour

The colour map to use when colouring hatch styles in each of the classification layers.

1. Click the check box to enable the option.

2. Select an colour map from the list.

Symbol Sizes

The range of symbol sizes to be coloured according to the colour map file selected for symbols.

1. Click the check box to enable the option.

2. Type a Start Size in millimetres at display scale.

3. Type an End Size in millimetres at display scale.

Line Sizes

The range of line sizes to be coloured according to the colour map file selected for lines.

1. Click the check box to enable the option.

2. Type a Start Size in millimetres at display scale.

3. Type an End Size in millimetres at display scale.

Procedure

1. Select the layer for which you want to create classification layers.

2. Select the Create Layer by Classification command.

The New Classification dialog box is displayed.

3. Enter a Name for the group that will contain the classification layers.

4. Select the Classification Type.

5. Select the Attribute to classify by.

6. Specify the interval for the attribute value classification rules.

7. Define any necessary portrayal options.

8. Click OK.

A new group containing the resulting classification layers is added to the Layers window. Each layer will be named according to the rule generated for the classification criteria.