Integration of hydrological observations into a Spatial Data Infrastructure under a Sensor Web environment

Figures & data

Figure 1. The architecture and components of the proposed method.

Figure 2. Schema transformation between an SOS and WFS.

Figure 3. Schema-matching results between sosGetObservation.xsd and wfs.xsd.

Figure 4. The Jinsha River case study illustration of the proposed method.

Table 1. Response times of the SOS chaining WFS method.

	Results
Methods	100	500	1000	5000	10,000
SOS chaining WFS
O&M size (KB)	7.81	9.28	45.51	215.64	424.73
GML size (KB)	50.34	249.45	493.48	2467.8	4989.6
Transfer time (s)	0.14	0.172	0.578	2.494	4.953
Extraction time (s)	0.015	0.073	0.138	0.325	0.724

Figure 5. Visual query for hydrological observation data in virtual globe.

Figure 6. Diverse visualization for hydrological observation data in virtual globe. (A) Property of hydrometric station, including the name, subordinate river basin, administrative unit, longitude, latitude etc; (B) Stage hydrograph to represent the water level observation data; and (C) Tables to represent the water level observation data.