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just saw the news yesterday : Britain has voted to leave the European Union, forcing the resignation of Prime Minister David Cameron and dealing the biggest blow since World War Two to the European project of forging greater unity. Global stock markets plunged on Friday, and the British pound saw its biggest one day drop in history, as results from a referendum defied bookmakers' odds to show a 52-48 percent victory for the campaign to leave the bloc Britain joined more than 40 years ago. The United Kingdom itself could now break apart, with the leader of Scotland, where nearly two-thirds of voters wanted to stay in the EU, saying a new referendum on independence from the rest of Britain was "highly likely". German Chancellor Angela Merkel will meet French, German and Italian leaders in Berlin on Monday to discuss future steps, and the foreign ministers of Germany, France, Italy, Belgium, the Netherlands and Luxembourg, will meet on Saturday morning. U.S. President Barack Obama on Friday tried to limit the fallout from Britain's vote to leave the European Union which threatens to harm the U.S. economic recovery and distract U.S. allies from global security issues. Obama, who had argued passionately against the UK leaving the EU in a trip to the Britain this year, vowed that Washington would still maintain both its "special relationship" with London and close ties to Brussels. In an emotional speech on Friday, UK Prime Minister Cameron, who led the campaign to remain in Europe to defeat, after promising the referendum in 2013, said he would leave office by October. "The British people have made the very clear decision to take a different path and as such I think the country requires fresh leadership to take it in this direction," he said in a televised address outside his residence. "I do not think it would be right for me to be the captain that steers our country to its next destination," he added, choking back tears before walking back through 10 Downing Street's black door with his arm around his wife Samantha. The British pound fell as much as 10 percent against the U.S. dollar on Friday to levels last seen in 1985 on fears the decision could hit investment in the world's fifth-largest economy, threaten London's role as a global financial capital, and usher in months of political uncertainty. The euro slid 2.0 percent against the U.S. dollar. [MKTS/GLOB] World stocks saw more than $2 trillion wiped off their value. European stocks ended down 7.0 percent STOXX, the biggest one day fall since 2008. U.S. stocks fell suffered the largest selloff in ten months sharply, with the Dow Jones industrial average .DJI losing 3.4 percent. [.N] Investors rushed to put their cash in the safety of gold which clocked up its biggest daily gain the global financial crisis of 2008, ending Friday up 5.0 percent at $1,315 an ounce. source : http://www.reuters.com/article/us-britain-eu-idUSKCN0Z902K

"The British people have made the very clear decision to take a different path and as such I think the country requires fresh leadership to take it in this direction." Well, 52 / 48 % is not really clear decision in my opinion and this a free choice from the UK citizen. "In an emotional speech on Friday, UK Prime Minister Cameron, who led the campaign to remain in Europe to defeat, after promising the referendum in 2013, said he would leave office by October." Prime Minister Cameron can blame himself because he initiates this referendum and he criticize the role and the decisions applied by Brussels. Anyway Europe had to change and this will force them to think differently how Europe should be. Bye, bye UK. darksabersan.

They use te same principle for 3D recosntruction: Stereovision. They simple calim, "the imagery does not need to be captured as traditional stereo pairs" but they use the stereoscopic pronciple. About GCPs there only 4 options: 1) They got a HUGE base of existants GCPs (or georreferenced images) 2) They got very precise oribital parameters (Similar to classic External Orientation) 3) they got any comercial secret unknow by scientists. 4) they lie (I don't think so) I'll like to add some reference numbers to explain my statement Here goes some numbrers about the need of accurate orbital parameters. A satellite height between 500 and 700km, implies velocities betwen 7.52 and 7.62 Km/s So... if you want satellite position better than 1 meter you need an accurate position 10.000 times by second (no GPS got that rate) So.. we must interpolate positions... Attitude: an error of 1 arc second means at 700 Km, 3.39m (2.42m at 500km), so... we need an attitude accuracy of 1/3" or better... Thats goes for an absolute geolocation of 3meters (despite heigths) Obviously you need attitude data at 10KHz rate (10.000 mesures, by second) Again. we must interpolate. The good news: At those heigths orbits are mostly smooths, and position and attitude changes are not violent, as in an aircraft. The Toutin’s Rigorous RPC Model (Toutin, 2002), was the better choice for that. A good paper on "COMPARISON OF DIFFERENT MATHEMATICAL MODELS ON THE ACCURACY OF THE ORTHORECTIFICATION OF ASTER IMAGERY" could be found here: http://www.isprs.org/proceedings/XXXVI/1-W41/makaleler/OK_Model_ASTER.pdf Art