ol-ext: Clip map or layer
ol.filter.Clip
use a list of coordinates to clip map or layer.
Coordinates can be defined with pixel units or percentage.
Form:
circle
square
old map
circle
keep aspect ratio
Color:
none
black
red
Position
top-left
top-center
top-right
middle-left
middle-center
middle-right
bottom-left
bottom-center
bottom-right