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Solution You are using the Swiss national grid which exists in two versions: The coordinates in your layer are in the "old" style: CH1903 / LV03, corresponding to EPSG:21781 ( fundamental reference p …

Another option would be to integrate your two models in another model. QGIS documentation says: A model behaves like any other algorithm, which means that you can add a model that you have already cr …

Solution You don't even need to rename the clipped line layer to integrate both of your models in a single one. In the answer you linked to, the problem was with input layers. Here, we deal with layer …

The easiest way to show overlapping points is to set layer rendering style to Point Cluster. You will automatically see how many points are clustered in one location. This works for points on the same …

There seem to be two problems: layer CRS and file format. To solve both, proceed as follows: Layer CRS Your screenshot shows that your data is in a geographic CRS (EPSG:4326). When I download the data …

I see two problems in your approach: The file you load seems to be a txt file, not a csv file. You should save your text file as csv. You say you "added delimited text layer" to QGIS. CSV files cann …

Save your project as QGIS files (.qgs), not the default (zipped) .qgz file - or unzip the .qgz project file. Then you're able to open the project in a text editor in a human-readable format. There, yo …

Use Menu Processing > Toolbox > Split Vector Layers tool and use the X-field (country) in the first round. Then again split the resulting US and Canada layers again, this time using the Y-field (state …

You can't save data inside of the QGIS project file. Using QGIS, project and data are always stored separately. What you can do, however, is to save the project plus data file to the same Geopackage f …

Based on spatial relationship To do it based on spatial relationship, you can use one of the overlay functions, e.g. using one of the following expressions. The first two only work if the two lines ar …

Extract start- and end-points of the lines using Menu Processing > Toolbox > Geometry by expression with this expression: union (start_point ($geometry), end_point($geometry)), then run Multipart to …

Run Geometry Checker to see if the lines are valid. As an alternative, explode the line, delete duplicate geometries, then select all lines and merge selected features. Finally, run Multipart to Singl …

Use the following expression on the point layer and adapt it to your needs. It checks whether the point layer's attribute named value is 0: If not, the current value of value will be returned. if val …

On the line layer, use this expression to identify the id of the point that lies on (or nearest to) the line: overlay_nearest( 'point_layer', $id)[0]. Instead of point_layer, use the name of your poi …

Use Menu Processing > Toolbox > Geometry by expression (see documentation) with this expression: collect_geometries( array_foreach( generate_series (1, "Number"), make_point ($y,$ …