How to do Buffer Analysis in QGIS?

Buffer is a spatial analysis done in GIS. It is a kind of neighborhood function which uses geometric distance to define the neighborhood of one or more target locations then determine the area around them, within a certain distance.

It can be done on both vector and raster data. The one normally done with raster data is called proximity analysis in GIS. Here I'll be using vector data.

Objective: The main objective of this tutorial is to learn buffering in QGIS. Lets say this buffering is for a road expansion project.

Step1: Load the road data ‘RoadClipped_44N in Layers panel.

 

Step2: Go to Vector -> Geoprocessing Tools -> click on Buffer 

A window will be displayed like this.
 

Now adjust the following settings parameter
Step3: Keep Input layer as ‘RoadClipped_44N’, Distance: 5, Units: meters, Save it to a file by clicking three dots icon in (Lab1.4/ Output folder) and finally click Run
 

If everything goes right you will see following output.

 Step4: Load the ‘Building_44N’ data in layers panel.

Finally, we have got our buffer.
 You can zoom in zoom out and 

Want to see the video?

See the affected houses.