Hands-On Geospatial Analysis with R and QGIS

Creating a validation shapefile

We will learn here how to create a validation shapefile. To do so, we need to create a new shapefile and then digitize a raster file to populate the shapefile with attribute information. Now, click on Layer, then Create Layer, and then on New Shapefile Layer...

Now, save it to your desired location and create a new field named class, as follows:

Again, we need to digitize, and so we need to click on Toggle Editing:

Now, create a polygon by left-clicking and stopping by right-clicking when the desired shape is ...