i saw this on the wiki and i'm a bit confused now

does this mean i have to build one initial cornerpost and then i can build all the way around my claim? (1 Initial and 3 Subsequent cornerposts?)
Initial Cornerpost:
* Block of Wood x100,
* Leather x10,
* Bone Glue x2,
* Rope x5
Subsequent Cornerposts
* Block of Wood x30
Wall Sections:
* Block of Wood x3
Gate:
* Block of Wood x30
http://havenandhearth.wikia.com/wiki/Palisade