- Learning QGIS 2.0
- Anita Graser
- 500字
- 2021-08-06 16:49:24
Introducing the QGIS user interface
Now that we have set up QGIS, let's get accustomed to the interface! The biggest area is reserved for the map. To the left of the map, there are the Layers and the Browser panels. Below the map, we find important information such as (from left to right), current map coordinates, map scale, and the (currently inactive) project coordinate reference system (CRS).
Next, there are multiple toolbars to explore. If you arranged them as shown in the previous section, you'll find the following toolbars in the top row:
- File: This toolbar contains tools to create, open, save, and print projects
- Manage Layers: This toolbar contains tools to add layers from vector or raster files, databases, web services, text files, or create new layers
- Database: Currently, this toolbar only contains DB Manager, but other database-related tools will appear here when they are installed
- Help: This points to the user manual download
The following screenshot shows what the preceding toolbars look like:
The second row of toolbars contains the following:
- Map Navigation: This toolbar contains pan and zoom tools
- Attributes: These tools are used to identify, select, open attribute tables, measure, and so on
- Label: These tools are used to add, configure, and modify labels
- Vector: This is currently empty, but will be filled by additional Python plugins
- Web: This is currently empty, but will be filled by additional Python plugins
The following screenshot shows what the preceding toolbars look like:
On the left screen border, we put the following:
- Plugins: This is currently empty, but will be filled by additional Python plugins
- Raster: This toolbar includes histogram stretch, brightness, and contrast control
The following screenshot shows what the preceding toolbars look like:
Finally, on the right screen border, we find the following:
- Digitizing: These tools enable editing, basic feature creation, and editing
- Advanced Digitizing: This toolbar contains undo/redo, advanced editing tools, geometry simplification, and so on
The following screenshot shows what the preceding toolbars look like:
Tip
All digitizing tools are currently inactive. They will only turn active once we start editing a vector layer.
Toolbars and panels can be activated and deactivated via the View menu's Panels and Toolbars entries as well as by right-clicking on a menu or toolbar, which opens a context menu with all available toolbars and panels. All toolbar tools can also be accessed via the menu. If you deactivate the Manage Layers toolbar, for example, you will still be able to add layers using the Layer menu.
QGIS is highly customizable. You can increase your productivity by assigning shortcuts to the tools you use regularly by navigating to Settings | Configure shortcuts. Similarly, if you find that you never use a certain toolbar button or menu entry, you can hide it by navigating to Settings | Customization. For example, if you don't have access to an Oracle Spatial database, you might want to hide the associated buttons to remove clutter and save screen estate as shown in the following screenshot:
