In this video, I present the key tools in spatial problem solving namely Difference, Union, Intersection, Symmetric difference and the buffer tool including Dilation and Erosion as well as Fringe and Margin

Chapters
0:00 Introduction
0:21 Overlay tools (operations on sets)
1:05 The Difference operator
1:50 Locating the tools in QGIS
2:46 The multi variant of the tools
3:58 The Union operator
5:26 The Intersection operator
6:28 The Symmetric difference operator
8:25 The Clip operator
9:00 The buffer tool
9:40 The Dilation (buffer) operation
10:55 The Erosion (negative buffer) operation
11:26 Buffer tools by default includes the object being buffered
12:17 The Fringe (outer edge) operation
13:38 The Margin (inner edge) operation
15:25 Summary