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How to set scale dependent rendering in QGIS?
To set scale-dependent rendering, open the Properties dialog by double-clicking on the layer in the legend. On the General tab, click on the Scale dependent visibility checkbox to activate the feature, then set the minimum and maximum scale values.
When to use QGIS as a measuring tool?
This is useful, if you want to measure along lines or areas in vector layers. To select a measuring tool, click on and select the tool you want to use. Measure Line: QGIS is able to measure real distances between given points according to a defined ellipsoid.
When do you refresh the map canvas in QGIS?
By default, QGIS renders all visible layers whenever the map canvas is refreshed. The events that trigger a refresh of the map canvas include: QGIS allows you to control the rendering process in a number of ways. Scale-dependent rendering allows you to specify the minimum and maximum scales at which a layer will be visible.
How to update the feature count in QGIS?
By default, QGIS does not display any features for a layer until the entire layer has been rendered. To update the display as features are read from the datastore, choose menu option Settings ‣ Options and click on the Rendering tab. Set the feature count to an appropriate value to update the display during rendering.
When do you need to add custom CRS projection to add in QGIS?
When do you need to add Custom CRS projection to add in QGIS? After all QGIS supports more than 2700 predefined CRS – Coordinates Reference system. Which is very common and is also installed in PostGIS database.
How to improve the rendering quality of a map?
QGIS has an option to influence the rendering quality of the map. Choose menu option Settings ‣ Options, click on the Rendering tab and select or deselect Make lines appear less jagged at the expense of some drawing performance. There are some settings that allow you to improve rendering speed.
How to identify features in the QGIS toolbar?
The Identify tool allows you to interact with the map canvas and get information on features in a pop-up window. To identify features, use View ‣ Identify features or press Ctrl + Shift + I, or click the Identify features icon on the Attributes toolbar. QGIS offers two ways to identify features with the Identify features tool:
Which is the next version of QGIS 2.8?
This is the change log for the next release of QGIS – version 2.8 ‘ Wien’. Wien is German for ‘Vienna’ – host city to our developer meet up in November 2009 and again in March 2014. This is a special release since it is designated an ‘LTR’ (Long Term Release).
What are the advantages of a combo box?
A Combo Box Form Control has many advantages over a traditional Data Validation drop-down list. The drop-down indicator is always visible in a Combo Box; where a user must click on a cell to reveal the Data Validation drop-down indicator Dependent Combo Boxes will automatically react to subsequent changes made in the first Combo Box.
Why is QGIS 2.14 in a feature freeze?
This is a special release since it is designated an ‘LTR’ (Long Term Release). LTR releases will be supported with backported bug fixes for one year, and will be in permanent feature freeze (i.e. no new features will be added, only bug fixes and trivial updates).