Clean your 3D scan and explore the tools of Meshmixer
Install the Software Exact Flat
3D Printing and 3D Scanning
Similar as described in the outline at hodey, we scanned parts of bodies with a special camera which is installed on an Ipad. You have to surround the object and your programm (fusion360) will get the custom-fit sketch in a very fast way
The software for the scanner is called Sense
it can automatically measure distances (2 lenses). It builds your scanned object in real size with all measurements