plats is a form of:

Plat



ENGLISH MEANING
noun
1.
A plot; a plan; a design; a diagram; a map; a chart.
2.
Work done by platting or braiding; a plait.
3.
A small piece or plot of ground laid out with some design, or for a special use; usually, a portion of flat, even ground.
4.
Plain; flat; level.
5.
The flat or broad side of a sword.
verb
1.
(TRANSITIVE) To lay out in plats or plots, as ground.
2.
(TRANSITIVE) To form by interlaying interweaving; to braid; to plait.
adverb
1.
Plainly; flatly; downright.
2.
Flatly; smoothly; evenly.