Questions tagged [virtual-field]

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0
votes
1answer
26 views

Importing Virtual field in a geopackage

I have defined a virtual field to generate additional information in dependence of another attribute. Now I want to import the shape in a geopackage. I want to have the virtual field in the geopackage ...
4
votes
4answers
163 views

Placing data-defined labels both by expression and manually

In my project layers (QGIS 3.6.2) I use data-defined label placement. I am trying to set up the placement as follows: By default, the placement chosen in Label Settings is used (in my case, "around ...
1
vote
0answers
92 views

Field Calculator not Allowing Decimal Numbers (QGIS 3.6) [closed]

QGIS version 3.6 When creating new virtual fields in shapefiles, the field calculator does not allow the output field length or precision to be changed. These are both greyed out except for when ...
1
vote
0answers
48 views

QGIS automation field from Excel

I present the following situation. 1 - Draw polygon shape in QGIS 3.4 / geopackage, only with two columns ID and NUM_SETOR, using the google maps image as reference. 2 - Excel table where I combine ...
1
vote
0answers
111 views

Changing Virtual field properties in QGis 3.0

I have some existing virtual field with set Length and Precision An example: The formula was first set to rounding it by 2 digits With the current settings it displays 10.00 instead of 10 because of ...
2
votes
1answer
183 views

Deleting virtual field in QGIS?

I'm trying to delete a virtual field from a layer attribute table. The layer source is a Spatialite database so I know that it's not straightforward to remove permanent fields, but as I understand it ...
4
votes
1answer
715 views

QGIS 2.16 Creating virtual field with aggregate expressions

With QGIS >=2.16, it is possible to use aggregates in expressions, such as sum, average... etc. But when I use it to create a new virtual field using the field calculator, the newly created field ...
4
votes
1answer
159 views

Using virtual fields as join fields in QGIS fails (NULL values in joined fields)

I have a point shapefile and a CSV file containing various attributes and three columns (here: street,num,addnum) based on which I would like to join both tables like attribute1;...;attributen;street;...
1
vote
1answer
254 views

Is there a way to copy virtual fields from one project to another?

I have a project with several layers, each of which has several quite complex virtual fields in order to analyse a particular site. I'd like to perform a similar analysis of a new site in a new ...
3
votes
3answers
381 views

QGIS add virtual field to csv layer

In QGIS 2.14.3 added a csv file as a layer. Attempt to add a virtual field like shown in the screenshot below (same result with "field_14" || ' ' || "field_10" || "field_11"): The field is created ...