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How to change the length of a field in QGIS?
When I use the field calculator to create a new field, it doesn’t matter what changes I make to the field type, field width or precision, I continually get the length to 13 decimal place. In the latest dev QGIS version there is a new round function which you can use to control the number of decimal places:
Is there a way to AutoNumber a field in QGIS?
It is a way to autonumber in QGIS that can be used for all kinds of vector data sources, so it’s also usable for for example shapefiles. This example is split up in two parts. In the first part I explain how you can add a unique number to existing features.
How to control the number of decimal places in QGIS?
In the latest dev QGIS version there is a new round function which you can use to control the number of decimal places: round ($length,3) Result: 1.10228762876525 -> 1.102
How big does a column need to be in QGIS?
Primary key¶. QGIS requires that PostgreSQL layers contain a column that can be used as a unique key for the layer. For tables, this usually means that the table needs a primary key, or a column with a unique constraint on it. In QGIS, this column needs to be of type int4 (an integer of size 4 bytes).
What to do with the CRS menu in QGIS?
The CRS menu enables you to choose the Coordinate Reference System for this project, and to enable on-the-fly re-projection of raster and vector layers when displaying layers from a different CRS. With the Identify layers menu, you set (or disable) which layers will respond to the identify tool. By default, layers are set queryable.
How does the coordinate display work in QGIS?
These settings, which default to the units set in QGIS options but then overrides it for the current project, are used in: The Coordinate display allows you to choose and customize the format of units to use to display the mouse coordinate in the status bar and the derived coordinates shown via the identify tool.