An Interactive WWW Service of Wave Data produced by Numerical Models

Sung-Dae Kim, Ki-Cheon Jun, Dong-Young Lee, Soo-Young Park

Korea Ocean Research & Development Institute, Korea

An interactive WWW service system is developed to provide wave data of deep water and shallow water produced by several numerical models. The deep wave data of 67 points around Korea peninsula are computed by HYPA model whose grid size is 27km and the shallow wave data are calculated at 13 Korean coastal areas by SWAN models whose grid sizes are from 250m to 750m. The results of models are saved in binary files for minimizing file size and extraction time. This wave information system consists of six main menus and about 20 sub menus to provide average wave height, wave distribution, wave rose, extreme wave height, etc. in form of digital values and spatial distributions of wave heights in form of graphic images. The user interfaces are HTML documents including several text boxes, combo boxes, buttons and image maps for CGI process to get user's requirement through internet. ASP scripts files and C language programs are used for responding CGI request, FORTRAN programs for data extraction from binary output files, and JAVA applets for visualization of spatial distribution. When WWW users choose search conditions for data extraction, wave data are displayed in table format or graphics as result of harmonious execution of several programs coded by multi languages. This system also provides wind data used as input parameter of wave models produced by ECMWF (European Centre of Medium-Range Weather Forecasts).