If you can see a straight line curved at the edge of picture, you will have ~2% or so distortion. How about 0.1% distortion? That still makes a satelite camera not accurate enough
Distortion is also important
所有跟帖:
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                    正想说这个
                     -云漫- 
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                        01/31/2012 postreply
                                                09:44:53
                    
                    
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                    是。民用也用不着很好的。
                     -二泉映月09- 
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                        01/31/2012 postreply
                                                10:00:08
                    
                    
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                    云师分析的一个通俗例子: 军队的战地记者用的是民用镜头.
                     -河舟- 
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                        01/31/2012 postreply
                                                11:08:46