QGIS User Guide - OSGeo Download Server

5.4 Proprietà dei layer vettoriali
For convenience, the list in the bottom part of the tab lists the values of all currently selected attributes
together, including the symbols that will be rendered.
The example in figure 13 shows the category rendering dialog used for the rivers layer of the qgis
sample dataset.
Graduated rendering
Figura 13: New Categorized Symbolizing options
The Graduated Renderer is used to render all the features from a layer, using a single user-defined
symbol, whose color reflects the classification of a selected feature’s attribute to a class.
Analogue to the categorized rendered, the symbology tab allows you to select:
• The attribute (using the Column listbox)
• The symbol (using the Symbol Properties button)
• The colors (using the Color Ramp list)
Additionally, you can specify the number of classes and also the mode how to classify features inside
the classes (using the Mode list). The listbox in the bottom part of the symbology tab lists the classes
together with their ranges, labels and symbols that will be rendered.
The example in figure 14 shows the category rendering dialog for the rivers layer of the qgis sample
dataset.
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