Original Articles
Chen Zhilong, Wang Xingbin, Ya
Abstract
Video is valuable for true geographic representation because of the spatial-temporal information of it. With the popularity of video capture devices such as smartphones, the volume of user-generated geographic video clips has grown significantly and the trend of this growth is quickly accelerating. Such a massive and increasing volume poses a major challenge to efficient video management. This paper aimed to introduce a geographic video 3D data model based on geographic information. The main idea of the model is to utilize the location, trajectory and azimuth information acquired by sensors such as GPS receivers and 3D electronic compasses in conjunction with video contents. The raw spatial information is synthesized to point, line, polygon and solid according to the camcorder parameters such as focal length and angle of view. With the video segment and video frame, the three categories geometry object was defined using the geometry model of OGC Simple Features Specification for SQL. Additionally, the application case of the model including video query, video measure and video playing is discussed in detail. The application indicates that the model is an integration, loosely coupled, flexible and extensible data model for the management of geographic video.