Indicoasters
These basic felted coasters are embellished with needle felting in the shapes of Silver Lake, Osgood Pond, Lake Colby, Catlin Lake, and Raquette Lake. The dots in the four corners are indicators of lake condition including trophic status, acidity, acid neutralizing capacity, and road salt influence as reported in our Adirondack Lake Assessment Program 2020 Update.
More info here on Ravelry.