I need to do a 130m long bridge facade in 2D? Has anyone done similar flight?
I’ve done an approx 50m long fence in two straight line with free flight. First one was one way and 3m above back but it doesn’t add up a nice stitched up photo together.
I recommend you read the following article about image acquisition for different types of projects. In your case, I recommend that you review the “Building construction” section since oblique images would be adequate to capture the bridge fence. https://support.pix4d.com/hc/en-us/articles/202557459-Step-1-Before-Starting-a-Project-1-Designing-the-Image-Acquisition-Plan-a-Selecting-the-Image-Acquisition-Plan-Type#label4
I hope this information is useful for you.
Have a very nice day,