In the previous recipe, you installed the WPS module. It's now time to have a look at what it offers you and what can be done with its operations. As it is the easiest way, we will use the WPS request builder to explore geoprocessing operations.
Open the GeoServer administrative interface and open the WPS process builder page.
The first control in the page is a list containing all processes published by the WPS to you. If you open it and scroll down, you will see that it is a very long list and there are several different process grouped in categories.
Select the JTS:buffer item. The page loads some controls where you can input the operation's parameters. The first one is about the geometry on which you want to apply the buffer operation. Leave the TEXT type in the first list and select the application/wkt in the other list. This will allow you to insert geometry in a simple and well readable format. Insert a point geometry, as shown in the following...