This is a good read on some of the challanges and options. The satellite stuff is interesting as well
http://www.bbc.com/news/science-environment-26956798 Regards Mark Cupitt "If we change the world, let it bear the mark of our intelligence" See me on LinkedIn <http://ph.linkedin.com/in/markcupitt> *See me on StackExchange <http://gis.stackexchange.com/users/17846/mark-c>* =============================================================================================== The contents of this email are intended only for the individual(s) to whom it is addressed and may contain confidential or privileged information. If you are not the intended recipient, you must not disclose, copy, distribute, or use the contents of this email. If you have received this email in error, please notify the sender immediately and delete the email and any attachments. ===============================================================================================
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