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International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Volume XXXIX-B4, 2012 
XXII ISPRS Congress, 25 August — 01 September 2012, Melbourne, Australia 
WebGIS Structure and Functionalities 
  
  
  
  
  
  
  
  
  
  
MySQL 1. Request for map view 
(Datahase) 2.MySQL data loading 
op setting 
MapServer s| |s 3.MySQL georeferenced 
17 Je data return 
Web Server 4. Map results displaying 
5. Data download request 
da Lan 6. Data return 
Wab Browser / 
OpenLayers 
  
  
  
Figure 4 : Data Flow 
Figure 4 represents the data flow of user interaction with 
MapServer, which accesses georeferenced data from MySQL 
database and publish the maps on browser via WebServer. 
  
  
  
  
  
Figure 5. Visualisation of the surface currents from the HF 
Radar 
By means of this data flow, the system is providing basic GIS 
functionalities for map browsing with features to select different 
location, pan, zoom and downloading data and maps in different 
image format (Figure 5). Further, the time series data can be 
visualised on the fly in graph formats as shown in Figure 6. 
Sigrticont itase Heght 
  
20 0 0 00 
  
  
Figure 6. Time series graph of Significant Wave Height from a 
Wave Rider Buoy. 
6. CONCLUSION 
The system developed using the open source technology is cost 
effective way to integrate near real time data from Coastal HF 
21 
Radar, Tide Gauges, Wave Rider Buoys etc. into a WebGIS 
and for providing easy access to the data and visualization of 
complicated data sets on-the-fly. The system is being tested for 
integration of the oceanographic data from the remote sensing 
satellites. 
REFERENCES 
Brovelli, « M. A. and Magni, D. (2003), ‘AN 
ARCHAEOLOGICAL WEB GIS APPLICATION BASED ON 
MAPSERVER AND POSTGIS”, The International Archives of 
the Photogrammetry, Remote Sensing and Spatial Information 
Sciences, Vol. XXXIV, Part 5/W12. 
Regents of the University of Minnesota, 2011. MapServer 
Documentation, available at http///mapserver.org/ 
doumentation.html 
OpenLayers documentation, available at http://openlayers.org 
Oracle and/or its affiliates, MySQL 5.0 Reference Manual, 
2012, available at http://dev.mysql.com/doc/refman/5.0/en 
ACKNOWLEDGEMENTS 
The authors wish to thank Dr. S.S.C. Shenoi, Director, INCOIS 
and Dr. Shailesh Nayak, Chariman, INCOIS Governing Council 
for their keen interest and support in the ocean data 
management and web-based data services.