Hands-On Geospatial Analysis with R and QGIS

Creating polygon data

Creating line and vector data in QGIS is a very similar process to the workflows we followed for creating point vector data. Here, we'll look at some of the steps that we need to take in creating polygon data:

1. We need to create a new shapefile by clicking on New Shapefile Layer as shown for point data. Then, we need to select Polygon for Geometry Type. Later, we add a field to this layer by clicking inside the field for Name and specifying a name for the field; we've specified val, which is a numeric value, and so we've to select Decimal number under Type and then click on Add to fields list, as can be seen from the following screenshot:

2. We can add multiple fields of different data types. Here, we'll also add another ...