
266 Big Data: Techniques and Technologies in Geoinformatics
locations at small scale and actual sensor observations at large scale to limit the
number of sensor observations being transmitted in each request. However, a critical
drawback of these sensor data portals is that they can only present the sensor data
about which they have some prior knowledge.
Instead, we envision that a client-side platform for the sensor web should be
capable of communicating with any sensor web services that follow the same protocol.
Asthis type of client-side platform does not require any prior knowledge of the data
to retrieve and visualize sensor data, we cal ...