Компоновщик карты¶

Инструменты навигации¶

To navigate in the canvas layout, the print composer provides 4 general tools:

• ^{Увеличить}

• ^{Уменьшить}

• ^{Полный охват}

• ^{Обновить} (если вы обнаружили, что изображение находится в несогласованном состоянии)

Main properties¶

The Main properties dialog of the map Item Properies tab provides following functionalities (see figure_composer_4):

Figure Composer 4:

Map Item properties Tab

• The Preview area allows to define the preview modes ‘Rectangle’, ‘Cache’ and ‘Render’, as described above. If you change the view on the QGIS map canvas by zooming or panning or changing vector or raster properties, you can update the print composer view selecting the map element in the print composer and clicking the [Update preview] button.
• The field Scale sets a manual scale.
• The field Rotation allows to rotate the map element content clockwise in degrees. Note, a coordinate frame can only be added with the default value 0.
• The Draw map canvas items lets you show annotations that may be placed on the map canvas in the main QGIS window.
• You can choose to lock the layers shown on a map item. Check the Lock layers for map item. Any layer that would be displayed or hidden in the main QGIS window after checked on won’t appear or be hidden in the map item of the composer. But style and labels of a locked layer is still refreshed accordingly to the main QGIS interface.

Extents¶

The Extents dialog of the map item tab provides following functionalities (see Figure figure_composer_5):

Figure Composer 5:

Map Extents Dialog

• Раздел Границы карты позволяет указать границы карты, задавая максимальное и минимальное значения для Y и X или нажав кнопку [Взять с экрана].

If you change the view on the QGIS map canvas by zooming or panning or changing vector or raster properties, you can update the print composer view selecting the map element in the print composer and clicking the [Update preview] button in the map Item Properties tab (see Figure figure_composer_2).

Grid¶

The Grid dialog of the map Item Properties tab provides following functionalities (see Figure_composer_6):

Figure Composer 6:

Map Grid Dialog

• The Show grid checkbox allows to overlay a grid to the map element. As grid type you can specify to use solid line or cross. Symbology of the grid can be chosen. See Section Rendering_Mode. Furthermore you can define an interval in X and Y direction, an X and Y offset, and the width used for cross or line grid type.
• You can choose to paint the frame with a Zebra style. If not selected, general frame option is used (See Section Frame_dialog) Advanced rendering mode is also available for grids. See Section Rendering_mode)
• The Draw coordinates checkbox allows to add coordinates to the map frame. The annotation can be drawn inside or outside the map frame. The annotation direction can be defined as horizontal, vertical, horizontal and vertical, or boundary direction, for each border individually. Units can be in meters or in degrees. Finally you can define the grid color, the annotation font, the annotation distance from the map frame and the precision of the drawn coordinates.

Overview¶

The Overview dialog of the map Item Properties tab provides following functionalities (see Figure_composer_7):

Figure Composer 7:

Map Overview Dialog

If the composer has more than one map, you can choose to use a map to show the extents of a second map. The Overview dialog of the map Item Properties tab allows to customize the appearance of that feature.

• The Overview frame combolist references the map item whose extents will be drawn on the present map item.
• The Overview Style allows to change the frame color. See Section vector_style_manager .
• The Overview Blend mode allows different transparency blend modes, to enhance visibility of the frame. See Rendering_Mode
• If checked, the Invert overview creates a mask around the extents : the referenced map extents are shown clearly whereas everything else is blended with the frame color.

Main properties¶

The Main properties dialog of the Label Item Properties tab provides following functionalities (see Figure_composer_9):

Figure Composer 9:

Label Main properties Dialog

• The Main properties dialog is where is inserted the text (html or not) or the expression needed to fill the label added to the composer canvas.
• Labels can be interpreted as html code: check the Render as HTML. You can now insert a url, an clickable image that link to a web page or something more complex.
• You can also insert an expression. Click on the [Insert an expression] to open a new dialog. Build an expression by clicking the functions available in the left side of the panel. On the right side of the Insert an expression dialog is displayed the help file associated with the function selected. Two special categories can be useful, particularly associted with the Atlas functionnality : geometry functions and records functions. On the bottom side, a preview of the expression is shown.
• Define font and font color by clicking on the [Font] and [Font color...] buttons

Alignment and Display¶

The Alignment and Display dialogs of the Label Item Properties tab provide following functionalities (see Figure_composer_10):

Figure Composer 10:

Label Alignment and Display Dialogs

• You can define the horizontal and vertical alignment in the Alignment zone
• In the Display tag, you can define a margin in mm and/or a rotation angle in degrees for the text.

Main properties, Search directories and Rotation¶

The Main properties and Search directories dialogs of the Image Item Properties tab provide following functionalities (see Figure_composer_12):

Figure Composer 12:

Image Main properties, Search directories and Rotation Dialogs

• The Main properties dialog shows the current image that is displayed in the image item. Click on the [...] button to select a file on your computer.
• This dialog shows all pictures stored in the selected directories.

• В разделе Искать в каталогах добавляются и удаляются каталоги с изображениями в формате SVG.

• Image can be rotate, with the Rotation field.
• Activating the Sync with map checkbox synchronizes the rotation of a picture in the QGIS map canvas (i.e. a rotated north arrow) with the appropriate print composer image.

Main properties¶

The Main properties dialog of the legend Item Properties tab provides following functionalities (see figure_composer_14):

Figure Composer 14:

Legend Main properties Dialog

• Here you can adapt the legend title.
• Choose which Map item the current legend will refer to in the select list.
• Since QGIS 1.8, you can wrap the text of the legend title to a given character.

Legend items¶

The Legend items dialog of the legend Item Properties tab provides following functionalities (see figure_composer_15):

Figure Composer 15:

Legend Legend Items Dialog

• The legend items window lists all legend items and allows to change item order, group layers, remove and restore items of the list, edit layer names. After changing the symbology in the QGIS main window you can click on [Update] to adapt the changes in the legend element of the print composer. The item order can be changed using the [Up] and [Down] buttons or with ‘drag and drop’ functionality.
• The feature count for each vector layer can be shown by enable the [Sigma] button.
• Legend can be updated automatically, Auto-update is checked.

Fonts, Columns, Symbol and Spacing¶

The Fonts, Columns, Symbol and Spacing dialogs of the legend Item Properties tab provide following functionalities (see figure_composer_16):

Figure Composer 16:

Legend Fonts, Columns, Symbol and Spacing Dialogs

• You can change the font of the legend title, group, subgroup and item (layer) in the legend item. Click on a category button to open a Select font dialog.
• All those items will get the same Color
• Legend items can be arranged in several columns. Select the correct value in the Count field.
• The Equal columns widths sets how legend columns should be adjusted.
• The Split layers option allows a categorized or a graduated layer legend to be divided upon columns.
• You can change width and height of the legend symbol in this dialog.
• Spacing aroung title, group, subgroup, symbol, icon label, box space or column space can be customized throught that dialog.

Main properties¶

The Main properties dialog of the scalebar Item Properties tab provides following functionalities (see figure_composer_18):

Figure Composer 18:

Scalebar Main properties Dialog

• First choose the map the scalebar will be attached to.
• then choose the style of your scalebar. Six styles are available :
• Single box and Double box styles which contain one or two lines of boxes alternating colors,
• Middle, Up or Down line ticks,
• Numeric : the scale ratio is printed, i.e. 1:50000.

Units and Segments¶

The Units and Segments dialogs of the scalebar Item Properties tab provide following functionalities (see figure_composer_19):

Figure Composer 19:

Scalebar Units and Segments Dialogs

In those two dialogs, you can set how the scalebar will be represented.

• Select the map units used. There’s three possible choices : Map Units is the automated unit selection, Meters or Feet force unit conversions.
• The Label field defines the text used to describe the unit of the scalebar.
• The Map units per bar unit allows to fix the ratio between a map unit and its representation in the scalebar.
• You can define how many Segments will be drawn on the left and on the right side of the scalebar, and how long will be each segment (Size field). Height can also be defined.

Display, Fonts and colors¶

The Display and Fonts and colors dialogs of the scalebar Item Properties tab provide following functionalities (see figure_composer_20):

Figure Composer 20:

Scalebar Display, Fonts and colors Dialogs

• You can define how the scalebar will be displayed in its frame. Adjust the Box margin between text and frame borders, Labels margin between text and scalebar drawing and the Line width of the scalebar drawing.
• The Alignment in the Display dialog only applies to Numeric styled scalebars and puts text on the left, middle or right side of the frame.

Main properties¶

• For Basic shapes, this dialog allows you to choose a Ellipse, Rectangle or Triangle shape and its rotation.
• Unlike the other items, line style, line color and background color of a basic shape are adjusted with the Frame and Background dialog. No frame is drawn.
• For arrows, you can define here the line style : Color, Line width and Arrow head width.
• Arrows markers can be adjusted. If you want to set a SVG Start marker and/or End marker, browse to your SVG file by clicking on the [...] button after selecting SVG radio button.

Main properties, Show grid and Fonts¶

The Main properties, Show grid and Fonts dialogs of the attribute table Item Properties tab provide following functionalities (see figure_composer_24):

Figure Composer 24:

Attribute table Main properties, Show grid and Fonts Dialog

Figure Composer 25:

Attribute table Select attributes Dialog

• The Table dialog allows to select the vector layer and columns of the attribute table. Attribute columns can be sorted and you can define to show its values ascending or descending (see figure_composer_25).
• You can choose to display only the attribute of features visibled on a map. Check Show only visible features and select the corresponding Composer map to filter.
• You can define the Maximum number of rows to be displayed and margin around text.
• Additionally you can define the grid characteristics of the table (Stroke width and Color of the grid) and the header and content font.

Main properties¶

The Main properties dialog of the HTML frame Item Properties tab provides following functionalities (see figure_composer_26):

Figure Composer 26:

HTML frame Item properties Tab

• Point the URL field to the URL or the HTML file you want to insert in the composer.
• You can adjust the rendering of that page with the Resize mode.
• Use existing frames constraints the page inside its first frame or in the frame created with the next settings.
• Extent to next page will create as many frames (and their pages) as necessary to render the height of the webpage. Each frame can be moved around on the layout. If you resize a frame, the webpage will be divided up upon the other frames. The last frame will be trimmed to fit the webpage.
• Repeat on every page will first repeat the upper left of the webpage on every page, in same sized frames.
• Repeat until finished will also create as many frames as the Extend to next page option, except All frames will have the same size.