I'm not sure if you forget to click on the "dice" of the texture to make texture visible....
If it is not the case, please tell me. I have a tutorial but I need to convert from Thai to English. Sorry that I don't have the tutorial in word, just only pdf one.
On fig 01
1. Make a plane, size does not matter now. But the proportion need to be a multiplier of 1024. In the picture I make a plane at 1024x4086 meter and let the segments to be 4 in length and 1 in width. (4)
2. Make material of your satellite photo of which need to be at 1024x1024 pixels. Make it multimaterial and each Id as one of the picture progressively down like arrow 5
3. Mapping (6) that multimaterial to the plane you just did by using Planar and fill the box (8) with 1024 in both length and width.
4. The photo will fit nicely on each polygon in your ground poly. But each polygon in Ground poly will be the same. Next thing you need to unwrap it if it does not fit or the orientation is not what you want(9)
5. Then hit collase to your ground poly and select each polygon (10) and change the ID to that polygon according to each photo (red small arrow). In the picture the last polygon in my project is 4, so I changed that one to 4 and the picture will change.
6. Now you are done with your ground poly. Next thing you have to do is to match the size of it. You know how long the runway is, you make your dummy runway to that lenght and resize your gound poly to fit the runway length. That's all. No need to clone, no need to match each polygons. I think it is easier.
I got an idea from this web site but I cannot remmember which thread, let the credit be his if one knows.