Abstract: In some provinces and cities in China, higher resolution data with more variables are available for weather warning and comprehensive judgment of synoptic situation due to the promotion of the Doppler weather radar upgrading to dual polarization radar. As it is difficult to deal with such data through the traditional GDI+ visualization method, the rapid visualization of high resolution radar data has become an urgent problem to be solved. Using the WSR-88D dual polarization radar imported from USA by the Shanghai Meteorological Bureau, this paper intents to improve the display efficiency and accuracy by choosing the Qt graphical interface library in the designation of the human-computer interaction interface and utilizing the OpenGL shading language (GLSL) in the integration of the core functions, such as the color mapping, transformation and scaling, into the fragment shader. Practical application proves that the above designation provides a friendly human-computer interaction experience and a completing complex graphics with high efficiency and accuracy. Thus, it provides essential technical support for the accuracy of weather prediction and warning.

Key words:  Qt, OpenGL shading language (GLSL), dual polarization radar