How to create AI train data with QGIS

In this how-to, we will use Areas to store our data in. Areas can overlap and be grouped together using a particular attribute, in this case FOLIAGE. The FOLIAGE attribute should contain a single integer number, which represents the classification. For example, we can use the following classification:

1. Deciduous Tree
2. Pine Tree
3. Heath area
4. Hedge
5. Bush
6. Reed
7. Flower bed
8. Leafless Tree Area

The areas are drawn on top of a particular Overlay or WMS Layer of your project. In this case we will use the original satellite background layer of a Project's WMS service.

How to create AI train data with QGIS:

1. Setup a Project with an attributed Area and copy the WFS link
2. Setup QGIS with a Project's Area WFS and a Satellite Background
3. Setup the QGIS WFS Layer with a classification and attribute form.
4. Edit the WFS layer and add and edit features and saving the changes.

Setup a Project with an attribute Area and copy the WFS link

How to Setup a Project with an attribute Area and copy the WFS link:

1. Open your project in editor mode.
2. Hover over Areas in the ribbon bar, and select Add new Empty Area.
3. With the Area selected, select the Attribute tab in the Area Detail Panel.
4. Under Add new Attribute, type FOLIAGE for name and 1 for value.
5. Click Save New Attribute to add the FOLIAGE attribute.
6. Click on the Group by Attribute button in the Area Overview Panel.
7. Add the same Attribute name as added for the Area in the previous steps.
8. Next, hover over Areas in the ribbon bar and select Export Geo Data
9. For Filter, select Foliage
10. Select any of the GeoJSON options.
11. Click on the Copy the URL button next to Web Feature Service (WFS)

Setup QGIS with a Project's Area WFS and a Satellite Background

How to Setup QGIS with a Project's Area WFS and a Satellite Background:

1. Open QGIS
2. In QGIS, Hover over Layer in the ribbon bar, and under add new Layer, select add WFS / OGC API Feature Layer
3. In the Data Source Manager panel, select New.
4. Paste the copied WFS url from the Export Geo Data panel and paste it in the url field.
5. Provide an appropriate name, for example Foliage - My Project Name and confirm.
6. Click on the Connect button.
7. Select the layer named Foliage Areas and click on Add.
8. In the Tygron Application again, hover over Overlays and select Export Grid Data
9. Click on the Copy URL
10. In QGIS, hover over Layer again, and under add new Layer, select add WMS/WMTS.
11. Click on add new.
12. For the URL field, paste the copied Web Map Service (WMS) URL.
13. For the name, write Satellite - My Project Name and click on OK to confirm.
14. Click on connect and select the layer named SATELLITE ORIGINAL and click add.
15. In the Layers panel in QGIS, drag and drop the Foliage Layer above the Satellite Layer.

Setup the QGIS WFS Layer with a classification and attribute form

How to Setup the QGIS WFS Layer with a classification and attribute form.:

1. Right click on the Foliage Areas Layer, and select the Symbology Tab.
2. Changed the type to Categorized.
3. Click on the plus button to add 2 categories per type.
4. Per type, do the following:

Add an entry and provide it with an integer number, such as 1.

Select a color

Provide the name of the entry with the classification, for example Deciduous.

With the entry selected, press ctrl+c to copy the entry and ctrl+v to paste the entry.

Select the new entry and change the integer value to a floating point value, such as 1.0

1. Finally, add a final entry with no value and a color that significantly different from the classification colors, such as pink or purple. Name it legend entry Invalid Classification.
2. Click on the apply button.
3. Next Select the tab Attributes Form:
4. Change the option to Drag and Drop Editor.
5. Under form Layout, remove all fields except the FOLIAGE field.
6. Select the FOLIAGE field, and under general, select the Reuse last entered value option.
7. Optionally, under Defaults, set the Default Value to 1.

Edit the WFS layer and add and edit features and saving the changes

{{howto|title=Edit the WFS layer and add and edit features and saving the changes.

Notes

• You can choose to change the Attribute Form of the WFS Feature Layer to use the Classification instead of a text field with a number, in case the classification numbers are hard to remember.