Optimization of map event #6
Description
The system triggers the refresh of the features in the maps when some events are triggered by the users. So far, the event is called ‘move end’ and is an event triggered by OpenLayers. Each time users execute this event, the system triggers a federated SPARQL query to PostGIS (or any other database). We assume that this query is heavy and we have to minimize the number of queries that are called.