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I know each web service provides different features. But, If I use WMS service for my temporal data to get map images by performing some kind of aggregation in database(as it is temporal visualization), then the my application will get slow on some devices like mobile phones/tablets as it may take lot of time to fetch images." I disagree with this ...

Secure WMS/WFS with HTTPS use client-side certificates to authenticate individual users for each request to the server. Has the advantage that you don't have to change your WMS/WFS implementation (except by putting it on an HTTPS server) but has the considerable disadvantage that you need to distribute certificates to your users - not normally acceptable ...

You are currently probably using the GetObservationByID operation. What you want to do is call the GetObservation operation instead. The GetObservation operation will take in a featureOfInterest which can be a spatial constrain. So by calling GetObservation in your scenario with the spatial contrain of the region selected, GetObservation will return an ...