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PE and RS PUBLIC October 2013 : Page-880

Trends in Image Managem Disseminati on By Peter Becker Making Imagery Accessible Through Innovati ve Disseminati on temporal wealth of information so we can better understand the past, model the present and predict the future. How do we ensure this deluge of remote sensing data transitions the world into one of abundant information and knowledge instead of one of data overload? Massive volumes of imagery are being acquired from a large number of sensors aboard satellites, aircraft and UAVs. Every day, the rate of this acquisition is exponentially increasing along with the range of sensors and modularity. The choices for pixel size and spectral bands seem almost infi nite: pixel sizes range from kilometers primarily for atmospheric phenomena, to sub-meter for daily monitoring, down to centimeters for smaller projects, such as building site monitoring. Sensors capture visible bands, frequently near infrared bands as well as other multi-spectral bands, hyper-spectral, thermal, radar and lidar data. These additional modes enable automated differentiation of features, which in turn increases interpretability and enables automated extraction of greater amount of information. Temporal coverage is also increasing. Satellite imagery is now able to provide daily coverage at sub-meter resolution for any location on Earth. The massive archive of existing and new imagery is being further extended by scanning old historical aerial archives, as well as maps and engineering drawings, which provide a Changing How Imagery is Accessed Imagery is processed to create an extensive range of derived products including orthoimages, terrain models, surface models, and maps depicting change or extracted features. These derived products are typically much smaller in size than the original data source, are optimum for use in analysis, and when combined with other spatial data, enable knowledgeable decision making. Each derived product contains a representation of some important information, but is nearly always only one component of the information content that is available in the source. The source is never destroyed. Making the source accessible to different processes, exponentially increases the value added information products that can be built from a single source. For many organizations there is a requirement to store and retain the complete data source and be able to create and serve different 880 Oct ober 2013 PHOTOGRAMMETRIC ENGINEERING & REMOTE SENSING

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