Draw a Hundred Foot Circle in Qgis

QGIS GUI¶

• Menu Bar
  • Project
  • Edit
  • Edit (extra)
  • View
  • Layer
  • Settings
  • Plugins
  • Vector
  • Raster
  • Database
  • Web
  • Processing
  • Help
  • QGIS
• Panels and Toolbars
  • Toolbars
  • Panels
    • Layers Panel
      • Editing vector layer style
    • Working with the Fable contained layer order
    • Statistical Summary Panel
    • QGIS Overview Panel
    • Log Messages Console
    • Disengage/Redo Console
• Map View
• Status Bar

When QGIS starts, you lot are presented with the GUI as shown in the effigy (the numbers one through v in yellow circles are discussed beneath).

Figure QGIS GUI i:

QGIS GUI with Alaska sample data

Notation

Your window decorations (title bar, etc.) may appear unlike depending on your operating system and window managing director.

The QGIS GUI is divided into v areas:

1. Menu Bar
2. Toolbars
3. Panels
4. Map View
5. Status Bar

These five components of the QGIS interface are described in more detail in the post-obit sections. 2 more than sections present keyboard shortcuts and context help.

Map View¶

Also called Map canvass, this is the "business finish" of QGIS — maps are displayed in this area. The map displayed in this window will depend on the vector and raster layers you have chosen to load (come across sections that follow for more data on how to load layers). The map view can exist panned, shifting the focus of the map display to another region, and information technology can be zoomed in and out. Diverse other operations tin be performed on the map as described in the label_toolbars description above. The map view and the legend are tightly bound to each other — the maps in view reflect changes you lot make in the legend area.

Tip

Zooming the Map with the Mouse Bike

You can use the mouse bike to zoom in and out on the map. Place the mouse cursor inside the map area and roll the wheel forward (away from you) to zoom in and backwards (towards you) to zoom out. The zoom is centered on the mouse cursor position. Y'all can customize the behavior of the mouse wheel zoom using the Map tools tab under the menu.

Tip

Panning the Map with the Pointer Keys and Space Bar

You can use the arrow keys to pan the map. Place the mouse cursor inside the map area and click on the right arrow cardinal to pan east, left pointer central to pan due west, up arrow key to pan north and downwards pointer key to pan south. You can likewise pan the map using the infinite bar or the click on mouse wheel: just move the mouse while holding down space bar or click on mouse wheel.

Status Bar¶

The status bar provides you lot with general information about the map view, and actions processed or available and offers you tools to manage the map view.

On the left side of the condition bar, you can go a summary of actions you've done (such as selecting features in a layer, removing layer) or a long clarification of the tool you are hovering over (not available for all tools). On startup, the bar condition also informs you nigh availability of new or upgradeable plugins (if checked in Plugin Managing director settings).

In example of lengthy operations, such as gathering of statistics in raster layers or rendering several layers in map view, a progress bar is displayed in the status bar to bear witness the electric current progress of the action.

The Coordinate option shows the current position of the mouse, following it while moving beyond the map view. You can set the unit of measurement (and precision) to use in the projection properties, General tab. Click on the small-scale button at the left of the textbox to toggle between the Coordinate option and the Extents selection that displays in map units, the coordinates of the current lower leftmost and upper rightmost points of the map view, as you pan and zoom in and out.

Next to the coordinate display you will find the Scale display. It shows the calibration of the map view. If you zoom in or out, QGIS shows you the current scale. There is a calibration selector, which allows y'all to choose among predefined and custom scales to assign to the map view.

To the right of the scale display you can define a current clockwise rotation for your map view in degrees.

On the right side of the status bar, there is a small checkbox which can be used to temporarily prevent layers being rendered to the map view (see section Rendering).

To the right of the return functions, you lot find the ^{Current CRS:} icon with the EPSG lawmaking of the electric current projection CRS. Clicking on this lets you Enable 'on the wing' CRS transformation properties for the current project and apply another CRS to the map view.

Finally, the ^Messages button opens the Log Messages Panel which informs you lot on underlying process (QGIS startup, plugins loading, processing tools...)

Tip

Calculating the Right Calibration of Your Map Canvas

When yous start QGIS, the default CRS is WGS 84 (epsg 4326) and units are degrees. This means that QGIS will interpret whatsoever coordinate in your layer as specified in degrees. To get right scale values, you lot can either manually modify this setting, e.g. to meters, in the General tab nether , or you lot tin can utilize the ^{Electric current CRS:} icon seen in a higher place. In the latter case, the units are set to what the projection project specifies (e.g., +units=us-ft ).

Note that CRS choice on startup tin exist set in .

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Source: https://docs.qgis.org/2.14/en/docs/user_manual/introduction/qgis_gui.html

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