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Digtal SLR Camera mapping system A joint BlueGlen & Compass Informatics initiative Digital SLR technology has moved on leaps and bounds over recent years resulting in realtively low cost, medium format, digital cameras capturing high quality images in the 6 MegaPixel to 14 MegaPixel region. Integrating these cameras and constructing mapping systems using various navigation modules has, up untill recently, been difficult, primarily due to the relatively large bandwidth and storage required to handle these large images sizes. Historically, high-end digital cameras, manufactured by household names such as Kodak, Fuji and Nikon were designed primarily for conventional photography, where say tens of images may be acquired over the space of an hour or even the whole day. This is in stark contrat to mapping or survey requirements, where continuous, georeferenced images are required using a system that is robust, reliable, linked to navigation modules and containing rudimentary 'smart' features such as 'adaptive camera triggering'. The latter feature is useful since fine adjustements can be made to the camera triggering mechanism in response to real-time platform velocity whether in the air or on the ground.
The digital camera survey system is modular and scalable in design offering the user choice in camera type, navigation sensors depending on application and available budget. |
Above, Fuji S2 Pro, more information on www.fuji.co.uk or read Thom Hogan's review |
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Data Acquisition system The schematic below depicts a Fuji Pro S2 6 MegaPixle camera integrated with a (D)GPS system together with attitude recording sensor for aeruial survey. A secondary spatial video system is used to help direct navigation when digital mapping is unavailable.
Software is used to help manages all activities from flight planning through to data acquisition and data processing. Real time GPS is used for the 'moving map' module as well as controlling the fine triggering of the camera should the plaftorm velocity fall outside trigger point thresholds.
BlueGlen together with their partners Compass Infomatics can help advise on additional requirements such as power distribution units, mount systems and indeed conducting airborne surveys. Copyright © 2003 BlueGlen Technology Limited |
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