Implementation of the WebGIS of East China Sea seafloor observatory system

With the deepening exploration of the ocean, the building of seafloor observatory systems has become a hot topic. It is also a key way for furthering advancement in the area of the International Marine Science in the 21st century. China's first experimental seafloor observatory system named Xiaoqushan Seafloor Observatory has already been set up and put into operation since April 20th, 2009. Meanwhile, the state 863 program East China Sea Coastal Seafloor Observatory System and a research project concerning key technologies in seafloor observation are supposed to be completed in 2014. The East China Sea Seafloor Observatory System (ECSSOS) including the Xiaoqushan Seafloor Observatory and the coastal seafloor observatory system will be continually expanded in the near future. ECSSOS consists of multiple junction boxes and instruments performing full-time continuous monitoring. Thus how to store, transmit, analyze and share the large amount of received data will be an issue. To deal with this issue, the authors developed the WebGIS of ECSSOS. This paper aims to introduce the background, frame structure, function modules and technologies of this WebGIS, and make a detailed explanation of algorithms applied in real-time data querying module and historical data querying module.