Plot.plot({
projection: {
type: () => proj4d3("+proj=lcc +lat_0=46.5 +lon_0=3 +lat_1=49 +lat_2=44 +x_0=700000 +y_0=6600000 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs +type=crs"),
domain: dataset
},
inset: 4,
marks: [
Plot.geo(dataset, {
stroke: "black",
strokeWidth: 0.5,
fill: "rgba(0,0,0,0.3)"
}),
Plot.frame()
]
})