clustersCorrespondingToWatershed = d3.greatest([
maples2003WithClusters.filter((d) => {
return (d.watershed === 'Reference' && d.clusterIndex === 0)
|| (d.watershed === 'W1' && d.clusterIndex === 1)
}),
maples2003WithClusters.filter((d) => {
return (d.watershed === 'Reference' && d.clusterIndex === 1)
|| (d.watershed === 'W1' && d.clusterIndex === 0)
})
], (data) => data.length)