dichteste_wetterstationen.js

let ziel_breite = 53.6659197;
let ziel_hoehe = 10.2356524;
 
require("https")
.get("https://opendata.dwd.de/climate_environment/CDC/observations_germany/climate/10_minutes/air_temperature/now/zehn_now_tu_Beschreibung_Stationen.txt", async res => {
    let b = []; for await (let c of res) b.push(c);
    console.log(
        Buffer.concat(b)
        .toString("utf-8")
        .split("\r\n")
        .slice(2, -1)
        .map(l => {
            let stations_id = l.slice(0, 5).trim();
            let breite = parseFloat(l.slice(39, 50).trim());
            let hoehe = parseFloat(l.slice(51, 60).trim());
            let stations_name = l.slice(61, 101).trim();
            let bundesland = l.slice(102, 199).trim();
            let distanz = Math.sqrt(Math.pow(breite - ziel_breite, 2) + Math.pow(hoehe - ziel_hoehe, 2))
            return { stations_id, distanz, stations_name, bundesland };
        })
        .sort((a, b) => a.distanz - b.distanz)
        .slice(0, 5)
    );
});