Filters can be added to a GeoEvent Service to perform real-time filtering of GeoEvents based on a specified set of conditions. In GeoEvent Manager, you can add filters to a GeoEvent Service by dragging and dropping or double-clicking the Filter element from the New Elements list. A dialog opens allowing you to configure and add the new filter to the service designer canvas.
See What are filters? to learn more about the filtering capabilities available with GeoEvent Server.
Step-by-step instructions illustrating how to add filters to a GeoEvent Service can be found in the Introduction to GeoEvent Server tutorial. Access the tutorial from GeoEvent Server tutorials.