Hands-On Geospatial Analysis with R and QGIS

Buffer

Now we'll learn how to create buffer around a vector file. Using this, we can create a buffer around a point, line, or polygon feature. Suppose we have a shapefile of railways in Dhaka named railway_dhaka.shp. Now, if we want a buffer around this railway, we can use the buffer feature of the mmqgis plugin. The steps are for doing so are described here:

1. Install the mmqgis plugin.
2. Load railway_dhaka.shp.

3. Select Create under MMQGIS and then click on Create Buffers:

4. Select railway_dhaka for Source Layer, then put 0.5 for Fixed Radius and select Kilometers for Radius Unit. Select a folder where we want to save this buffer shape and ...