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Worldwide there has been a lot of developments of numerical models for water related problems, using mesh based approaches. The models are usually released with their own data formats and visualization tools. Computer power has developed greatly in the last 10-15 years resulting in capabilities of better representing physical processes, hence the size of output results becomes larger and larger. Taking this into account present paper presents the development of an open visualization tool (openVT) for mesh based water models, which has functions for loading and visualizing results from a suite of modeling systems, regardless of their data structures. The tool offers functions for multi plots and simple analysis of several variables. The paper presents the challenges of developing visualization for different type of results and of mapping these results in a comprehensible manner for the user. As an exemplification the results of Deltares modeling software suite (Delft3D, Delft3D-WAQ, SWAN, D-Flow, XBeach and SOBEK) are presented. Available file formats for visualization include netCDF, NEFIS, domain range time series binary files, and individual ASCII files. The formats have been defined as a separate structure inside openVT. Given that data structures predefined by standards, such as OpenEarth, the multi plots and simple analysis is easily implemented in Intel Visual Fortran (IVF). To improve the frame display frequency, openVT integrates the OpenGL library and optimizes the methods of data loading. The main limitation on publishing openVT as an open source code is the use of IVF, which does not belong under GNU licenses. Future works on openVT include: migration of the IVF codes to GCC, the GNU compiler collection, integration of more mesh based data types coming from other open source water modeling software such as openFOAM and TELEMAC, visualization of results from mesh free codes and development of an efficient data storage scheme.


Session R10, Hydroinformatics and Data: Innovative Aspects on Teaching, Information and Viz



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