Real-time rendering high-quality vector data on 3D terrain

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In the 3D geographic information systems (GIS), it is necessary to overlay 2D vector data on a 3D multi-resolution terrain model. This paper presents a precise and efficient texture-based overlaying algorithm. It generates vector textures from cascaded view-depended cameras to improve the utilization of texture pixels. The strategies of both depth splitting and screen space dividing are further adopted. All steps are based on programmable GPU pipeline. It runs in real-time and is suitable for displaying large-scale terrain with LOD algorithms.

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... In recent years, with the continuous development of computer technology and geographic data acquisition method, and the deepening of GIS applications, more and more people are demanding to deal with problems in real three-dimensional space (Li et al. 2011). In the field of 3DGIS, 2D vector data is still an indispensable data type. ...
... However, texture aliasing can occur at steep terrain because of the different resolutions of vector textures. Li Rong et al. (Li et al. 2011) used depth segmentation and screen space segmentation to cut up the scene volume and proposed a multi-cascade drawing method, but the efficiency was low and the rendering frame rate was not high yet. On the whole, in the most common multi-resolution 3D terrain, the traditional several types of vector data fusion rendering methods usually have a large amount of computation and cannot achieve a better fusion effect. ...
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Conference Paper
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