All Questions
Tagged with fields-attributes qgis
832 questions
2
votes
2
answers
114
views
Selecting only features that have another layers feature on top in QGIS
I have an aerial fibre plan and splitters on certain poles (these layers overlap each other). There are over 3000 poles and only 1699 of those poles have a splitter on them.
Is there any way I can ...
- 29
1
vote
0
answers
15
views
Adding custom fields to PgMetadata HTML Templates in QGIS [closed]
I am currently working with the PgMetadata plugin for QGIS, and I am trying to add a custom field (test) to the metadata HTML template. Here's the situation:
I have successfully added the test field ...
- 11
1
vote
0
answers
27
views
First field gets cleared (if time field) in QGIS Attribute Table
I recently noticed a strange bahavior in QGIS (currently working with version 3.34-7):
When the first field of a shapefile is named "time" (I regularly work with GPX files exported to ...
- 53
2
votes
1
answer
47
views
Loading selected geometry from GeoParquet with multiple geometry columns into QGIS
I have a GeoParquet file containing two geometry columns ("geom_p_4326" and "geom_4326") and an ID column ("id"). The first geometry column holds points and the second ...
- 21
1
vote
0
answers
41
views
Autocompleting attribute field in Drag and Drop Designer in QGIS
I need to manually add some rather long attributes to features. Is there a way to have the Drag and Drop Designer auto-complete these? (I access the table with 'Modify all selected features ...
- 303
1
vote
1
answer
50
views
Retrieving Attribute from closest feature or with most overlap form another layer
I am trying to use the Field calculator to retrieve an attribute from the closest feature in another layer. I have had the most success using Overlay_Nearest, but the array it returns does not use ...
- 11
0
votes
0
answers
44
views
QGIS adding field to multiple layers
is it possible to add a new field to multiple layers (with same geometry)? Layerstyles will only save the style. When I need the same field in all of my point layers, I must do this step by step and ...
- 51
0
votes
1
answer
55
views
QGIS copy fields in empty geopackage or reset FID
How to copy all fields and styles in a new geopackage without features? I will create a new geopackage. I´ve saved the style from an other geopackage and import this in a new geopackage. All styles ...
- 51
5
votes
2
answers
316
views
Deleting special characters from QGIS Attribute table
Is there a way to delete special characters such as *?
I've tried using replace and regexp_replace, but my version at least doesn't recognise special characters.
There are hundreds of fields, and I'm ...
- 157
2
votes
1
answer
69
views
Getting attributes from different layers with multiple overlaping polygons
In QGIS 3.34.4 I have 2 layers, one underlying layer (Layer 1) and an overlapping layer (Layer 2).
Both layers are polygon layers. I want to get the specific data of one field from layer 1 to a field ...
- 21
4
votes
2
answers
228
views
Creating new field from another field in QGIS Field Calculator
I am trying to create a new field in QGIS where:
if the number in the field "DN"=2, then the new field (a text string) will say "veg"
and if the number in the field "DN"...
3
votes
0
answers
39
views
Creating/updating fields without create temporary files in QGIS Model Designer
So I'm starting with an "add layer" input, then a "refactor fields"
and I need the output to update the original layer I added in the "add layer" at the beginning.
So I ...
- 31
2
votes
1
answer
150
views
When deleting attribute from GDB file all the fields in the remaining attributes get deleted as well in QGIS
In QGIS 3.38.2 I have a gdb shapefile with many attributes, let's say A100, A200, A300 and with many fields. When I go to the edit through the "Open attribute table" and delete A200, all the ...
- 191
0
votes
1
answer
34
views
Field data types change to text when exporting to CSV with 'Add saved file to map'
In QGIS 3.32.2-Lima when exporting a non-spatial layer, e.g. the output from the Statistics by category tool, to CSV with the 'Add saved file to map' checked, the data types of all fields of the new ...
1
vote
0
answers
26
views
Wrong field types when connecting to MSSQL DB with user-defined data types using PyQGIS
When I connect to an MSSQL table without geometry via QgsDataSourceUri, Browser or Data Source Manager, QGIS doesn't recognize the user-defined data types of the database and sets it to string.
from ...
- 31
0
votes
0
answers
36
views
Creating subtype and domain and linking them together in QGIS [duplicate]
I am wondering if there is a similar feature to subtypes in ArcGIS Pro within QGIS software. I want to create a subtype and a domain, and link them together in QGIS, similar to the example below:
...
- 21
1
vote
0
answers
110
views
Exporting GeoPackage to shapefile
I have a GeoPackage layer with point features containing some important attributes. When I try to export this layer into a shapefile format the point features are exported but all of the attributes ...
- 11
0
votes
1
answer
40
views
Expression for closest to zero value
I want to display the closest value to zero from a field in an attribute table from a QGIS layout without having to create a new field. Is it possible?
- 71
0
votes
1
answer
59
views
Fields that fill in automatically
I want to create a point layer with an ID field that fills in automatically as I digitize a geometry. It's possible? How can I do?
0
votes
1
answer
64
views
Copy and Paste in QGIS for plugin
I want to create a plugin where I can choose a layer to copy and paste. For copying a layer, I will select the specific layer and choose the field and features. Then, for pasting the layer, I only ...
- 49
3
votes
3
answers
147
views
Deselecting duplicate records in QGIS Attribute table
Several SE-GIS posts describe how to identify duplicate records, such as Identifying duplicate attributes in field using QGIS.
I would like to extend this concept by unselecting any duplicate records ...
- 8,356
2
votes
2
answers
269
views
Assigning unique ID to new points in QGIS
I want to add a new field to my feature attribute table. In this field, I want to generate a random ID (just a number, like 1, 2, 3, etc.) for every new and existing point I create on the map.
This is ...
- 101
0
votes
1
answer
42
views
Graduated symbology
I have opened a delimited text file with coordinates XY defined in two columns on the file plus two other columns with data and they are represented in QGIS as a point layer.
I want to symbolize the ...
- 71
1
vote
2
answers
89
views
Removing character from many field names in QGIS
I have a shapefile with ~100 fields. Each field corresponds to a date, the name of each field is something like this 2006-07-05 (year-month-day).
I want to remove the - symbol and have only 20060705. ...
- 131
3
votes
1
answer
239
views
Khmer Language is not properly displayed in layer fields in QGIS
I have created a new shapefile layer which uses Khmer language fields. The encoding is UTF-8. When I create new fields in Khmer in the attribute table it displays perfectly. Then as soon as I hit save ...
- 31
1
vote
1
answer
43
views
Mismatched IDs Between Two tables with relation using QField and QGIS
I am setting up my qgis qfield survey app. I have a shape file of metadata.shp that has a field “id” and another non geometric table log.dbf that has a field “fk_id”. They are in relation based on id ...
- 11
2
votes
1
answer
211
views
Repeating linestring across farm field at 40 inch intervals to use r.report for pixel values
I am a new user of QGIS. I have found answers to most of my issues. This one has me stuck. I have included an image of the project I am attempting to create.
My plan is to place a linestring on every ...
- 31
2
votes
0
answers
54
views
Calculating the end km with reference to the start km of road in QGIS
Note the labelling on the picture to be the lengths of the link segments and have been selected from Right to Left.
Start KM = KM at the beginning of the link
End KM = KM at the end of the link. (...
0
votes
0
answers
32
views
How to use a field not yet saved from a table in another table not yet saved in QGIS
I have a project in QGIS to register field points (x,y), where I collect different types of samples (soil, water, rock) for the same point.
I need that in the "Samples" table, when some ...
- 695
0
votes
1
answer
55
views
QGIS - attribute table - column to mark last edit in row
I would like to know, if there is a way to create a column for a Layer, that automatically applies the date and time of the last edit/change of values in a row, if it occurs?
- 555
1
vote
0
answers
52
views
How to create line topology from-node to-node table fields?
We are looking for a way to create line topology from-node and to-node attribute fields on a shape file as shown below. We know that ArcHydroTools GenerateFNodeTNode can do it, but want to avoid ...
- 137
1
vote
0
answers
41
views
Combining predefined list with custom entry in attribute form
Currently, I am working on a project to map plants outdoors. I would like to have a drop down menu to choose from a list of known species. But no list is complete and occasionally, I have to use ...
- 11
0
votes
0
answers
45
views
Changed project from QGIS 3.16 to 3.24, now 'NULL' fields turn into '-9223372036854775808'
Been working on a digitizing project on QGIS 3.16.15-Hannover, as I like to use LTR versions for the stability.
But, 3.34 introduced an automatically incrementing UUID field, which I find useful.
My ...
- 175
1
vote
1
answer
53
views
Expression to auto-fill field according to the order of polygon creation
I'm working on an urban cartography actualization project, looking for a way to auto-fill a field (let's call it "field_1") in the new polygons created in the buildings layer. I need to ...
- 73
0
votes
0
answers
154
views
QGIS - Attachment with a photo in the attributes does not show the photo and the button to open the file dialog
I received a QGIS map project with data that I needed to update. So I chose the Change data source layer and selected the updated data. Now I'm supposed to continue updating the data, but the upload ...
0
votes
0
answers
23
views
Relation QGIS: get_feature
I have 2 layers (1 polygon / 1 no-geometry (aType)). I have a relation between them.
As we know, we can display 1 value from the related layer via layer property -> Attributes Form.
In the widget ...
- 477
0
votes
1
answer
52
views
Testing the value of a field against a list of strings
I want to test the value of a field against a list of possible strings for inclusion (value contains none of these strings) or exclusion (value contains at least one of the strings).
The difficulty is:...
- 41
2
votes
1
answer
123
views
QGIS Field Calculator Expression: get field name for value at specific index
I am looking for a way to search the field name ( green circle ) of a value at a specific index.
In the example shown above I would like to find the field name "25 x 2,3" for the value of ...
- 199
0
votes
1
answer
128
views
Adding uploaded polygon measurement style to KML file polygons
Following up on QGIS: multiple map measurements I want to use a style to convert a kml layer to have measurements on all size, kind of like:
I'm using QGIS 3.28 LTE. I started by downloading the ...
- 143
1
vote
2
answers
175
views
Filling field with values from field of another table using QGIS
I am using QGIS 3.28.9.
I need to complete a field from a building's layer with the field's values from a plot's layer, based on the location of the buildings. At first I thought of doing it through ...
- 73
4
votes
2
answers
675
views
QGIS: expression in attribute table between greater than and less than with different categories in one field
I am trying to create a field that shows the following different categories in the same field:
Variable = verschil bouwhoogte
"Verschil bouwhoogte" <3
"Verschil bouwhoogte" =>...
- 43
3
votes
1
answer
95
views
Displaying two attributes of line vector layer with same color ramp in QGIS
I have a QGIS line vector layer that contains two attributes: "attr1", "attr2".
I want to display it as shown below. The same line geometry two times with an offset in both ...
- 645
1
vote
0
answers
116
views
Data-defined size legend only showing size in QGIS
I am having issues getting a legend set up in QGIS 3.34.1 for a point layer that is colored based on one attribute (population class) and then sized based on another attribute (population). I have ...
- 11
0
votes
0
answers
50
views
Duplicate features error in QGIS, I can't create new fields from shapefile layer
I've had the same problem. Sometimes when I create points from table (.xls), sometimes when I create a new polygon, I can't text to fields (ex. a field with character name). More, when I texted to the ...
0
votes
0
answers
78
views
(QGIS) Creating a rule to hide labels based on their appearance on a list or array
I'm creating maps for a project, and I'm handling sensitive data. I have a list of species I can't display on maps. I would like to create a rule that checks if the value in column "species_name&...
- 1
0
votes
0
answers
43
views
Display information from a different layer in an attribute table in QGIS
I have two different polygon layers we'll call them A and B. I would like to create an attribute table with fields that list areas of A and B (calculated using the $area function in field calculator). ...
1
vote
1
answer
92
views
QGIS: Need to create a feature for a vector layer with a list of all unique values derived from a raster layer's cells
I have a vector layer with inner boundaries delineating certain land-use types in each discrete area.
I also have a raster layer that contains information related to the vegetation found in each ...
- 31
1
vote
2
answers
273
views
Merging layers, then dissolving and keeping all attribute values in QGIS
I have three layers in QGIS, each with one feature, including some attributes.
Layer 1 has attributes a, b, and c,
Layer 2 has attributes d, e, and f and
Layer 3 has attributes g, h, and i
I want to ...
- 1,599
1
vote
1
answer
104
views
Setting a Boolean field to be empty
I have a layer with a Boolean field called bool.
I can set the field value to NULL, e.g. using the Field Calculator.
When printed via Python, the values are correctly shown as None:
>>> layer ...
- 11.3k
1
vote
1
answer
69
views
Handling *other* attributes in a drag'n'drop form
I built a form for my vector layer using the Drag'n'drop form designer but I only did so for some of the layers fields.
Is it possible to automatically add widgets for the other fields to the form, e....
- 11.3k