[GH85Carrera]

Morning all.

Over the hump and on the downhill slide toward the weekend. I have all the "small" tiles done, (200 MB each) and now I am making the big mama-looka mosaic. It has to be in a Jpeg2000 format. The Tiff files and Jpeg files all cap out in size limits so the JPEG2000 works great. Each of the individual tiles have a "world file" that matches the tiff file. The world file specifies precisely where the file belongs to mapping software. I can open all 962 of the tiles, and they lay out one next to the other in a grid and make one big image. You can then zoom in to any one image and do whatever measurements needed, and only need the one file open so things are zippy fast. There is a "shape file" that tells a client where each tile will open on a map.

It is really kinda cool. The coolest part is the 3D viewing we can generate from the images. The tile images I am working are just ortho-photos and they are looking straight down and all the buildings and structures are standing straight up. You can't see the sides of the buildings at all.

The client provided targets on the ground and had a surveyor give us the XY&Z location of each target. Then we can tie our project to the targets and the surveyor or the client can go to any point in the image and get a spatial position. They will ground check it and it will be within the National Map Accuracy standards.