I have a layer of polygons, cadastrals, that i'd like to have the length of the edge of:

[![Cadastral edge][1]][1]

I thought about doing this:

 1. Dissolve the polygons
 2. Create one large dissolved polygon
 3. Making a; From polygon to Line

But from here, i don't know what to do next. 

 - Cut it up, and measure the length of the line, then join attributes so that the polygons get the data. But how?


[![enter image description here][2]][2]


  [1]: https://i.sstatic.net/n6c23.png
  [2]: https://i.sstatic.net/mY665.png