Manipulated data from the Swiss Map Vector 500 dataset by swisstopo.
seen
An sf object containing polygon data with following attributes
Name of the Lake in the respective official language (see NLN1)
Probabbly greatest depth
Probabbly elevelation of lake level
Language
Area in m2
sfc_POLYGON data in EPSG 2056
https://shop.swisstopo.admin.ch/en/products/maps/national/digital/smv500
Manipulation:
Dropped some columns
selected lakes within switzland (st_intersects)