I've been experimenting with QGIS processing 🎉
QGIS processing can be used to process a variety of location data. Processing can be used in GUI, batch processing, Python scripting, and other methods. In this article, I will show you how to use GUI!
I have tried more than 60 different types of vector processing in "dayjournal memo." I'd like to recommend five of them for you this time! Processing can be used for a variety of other processes, including raster. Check them out!
The following is a detailed explanation.
- Advance Preparation
- Create BBox data
- Intersection Point Creation
- Data selection by spatial search
- Creating the center of gravity of geometry
- Create a group of equally spaced points
Advance Preparation
The following repository contains sample data of points, lines, and polygons. Please use it for verification.
Open the Processing Toolbox.
Start QGIS → Processing → Toolbox
Create BBox data
Automatically creates a BBox for each geometry.
Processing Toolbox → Vector Geometry → Output BBox
Set the target layer and destination as desired and execute.
Result
https://day-journal.com/memo/qgis-090/
Intersection Point Creation
Create points where geometry intersects.
Processing Toolbox → Vector Overlay → Intersect Lines
Set Target Layer 1, Target Layer 2, and Destination as desired, and execute.
Result
https://day-journal.com/memo/qgis-087/
Data selection by spatial search
The Within function is used to extract points contained in polygons. Other functions can also be used.
Processing Toolbox → Vector Selection → Selection by Location
Set the target layer, spatial search method, compared layers, and selection status arbitrarily, and then execute.
Result
https://day-journal.com/memo/qgis-076/
Creating the center of gravity of geometry
Create a point at the center of gravity of geometry.
Processing Toolbox → Vector Geometry → Center of Gravity
Set the target layer and destination arbitrarily and execute.
Result
https://day-journal.com/memo/qgis-122/
Create a group of equally spaced points
Create points on a line at intervals of a specified distance.
Processing Toolbox → Vector Geometry → Points along Geometry
Set the target layer, distance, start offset, end offset, and destination as desired, and execute.
Result
https://day-journal.com/memo/qgis-095/
Related Articles
References
QGIS
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