Method of Displaying and Drawing Meteorological Elements in 3D Earth Model

Abstract

The invention provides a fast displaying and drawing method of weather elements on a three dimensional earth model, and the method comprises the following steps: when a virtual camera is adjusted to a specific position and pose relative to the three dimensional earth model, determining a geographic coordinate range of a first visible region of the three dimensional earth model observed from the position of the virtual camera; expanding the geographic coordinate range of the first visible region for preset amplitude to obtain a second geographic coordinate range; obtaining all weather data sets contained in the second geographic coordinate range; preprocessing weather data in the weather data sets, performing graphic image conversion on the processed weather data to obtain a weather graphic image in a three dimensional earth scene; then rendering and outputting the three dimensional weather scene image. The method has the advantages that by defining the visible region, only weather data related to the visible region are necessarily processed and output, the interactive display speed of the three dimensional weather model is effectively improved and the use experience of a user is enhanced.

Description

technical field [0001] The invention belongs to the technical field of three-dimensional display of meteorological elements, and in particular relates to a method for displaying and drawing meteorological elements in a three-dimensional earth model. Background technique [0002] Meteorological elements include atmospheric humidity, air pressure, air temperature, atmospheric water temperature profile, cloud cover, precipitation, solar radiation and many other parameters. In order to enable meteorologists to observe and analyze meteorological data intuitively and comprehensively, it is necessary to display the meteorological data graphically. [0003] The traditional graphic display method of meteorological data is a two-dimensional plane map. Specifically, the meteorological data from the limited meteorological stations are subjected to different data analysis and processing to generate a weather map with a certain resolution and a certain area, for example, a pressure map. ...

AI Technical Summary

Problems solved by technology

[0006] However, the main problem in the above method is: after obtaining the 3D weather model, in order to fully observe the meteorological elements displayed by the 3D weather model, it is necessary to continuously adjust the position and attitude of the virtual camera, for example, to pitch, push and pull, and translate the virtual camera. and other actions; and whenever the position and / or attitude of the camera is adjusted, a complete 3D weather model needs to be loaded. Since the 3D weather model contains textures with a large area, it has the problem of slow loading speed, thereby reducing the The interactive display speed of the 3D meteorological model is reduced, which affects the user experience

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