QGIS User Guide - OSGeo Download Server

5 LAVORARE CON I DATI VETTORIALI
Symbol Properties
Figura 14: New Graduated Symbolizing options
The symbol properties dialog allows the user to specify different properties of the symbol to be rendered.
In the top left part of the dialog, you find a preview of the current symbol as it will be displayed
in the map canvas. Below the preview is the list of symbol layers. To start the symbol properties
dialog, click the Properties button in the General tab of the Layer Properties dialog.
The control panels allow adding or removing layers, changing the position of layers, or locking layers
for color changes. In the right part of the dialog, there are shown the settings applicable to the single
symbol layer selected in the symbol layer list. The most important is the ’Symbol Layer Type’ combo
box, which allows you to choose the layer type. The available options are SimpleLine, SvgMarker
and SimpleFill.
Depending on the chosen value, these settings are available in the right part of the dialog:
• SimpleLine: Color, Pen width, Pen style, Offset, Join style and Cap style;
• SvgMarker: Size, Angle, Offset X, Offset Y and SVG Image
• SimpleFill: Color, Border color, Fill style.
Example: A picture showing a line symbol composed from three simple lines with different pen widths.
Example: Symbol properties for a point layer Example: Symbol properties filling pattern for a polygon
layer
QGIS 1.4.0 User Guide 54