SUSTAINABLE DEVELOPMENT OF E-LEARNING MATERIAL FOR OPENGIS STANDARDS

Abstract. In this paper we discuss our experiences in creating lectures-on-demand using Flash streams based on MS PowerPoint slides that are enriched by author's comments (audio as well as video streams). We depict the drawbacks concerning up-to-dateness of lecture content and compatibility with different desktop and mobile devices. According to this, we focus on our workflow to create lectures using podcasts including slides, animations and movies that is independent from the lecturers' presence. In contrast to podcasts recording classroom lectures, we propose to store authors' explanations as text and to add his comments to the learning material in synthetic voice. Out-dated material can be exchanged without creating new video sequences in lecture time and extent and avoids time consuming re-taping and editing of existing course content. Moreover, splitting learning modules into small pieces facilitates and accelerates work during the regular update process. With this approach we are able to improve sustainability, since it saves cost and allows just in time production of rapidly changing learning content.