data = {
const wind = {N:0, NE:45, E:90, SE:135, S:180, SW:225, W:270, NW:315};
const csv = await d3.csv('https://raw.githubusercontent.com/ds5110/stinky2/main/sample_data/merged_data.csv');
return csv.map(d => [new Date((+d.date.slice(0,4)), +d.date.slice(5,7)-1,+d.date.slice(8,10)), wind[d.wind_direction], [+d.longitude, +d.latitude]]
);
}