better stations list

datagenerators/stations.js

@@ -0,0 +1,54 @@
+// list all stations in a single file
+// only find stations with 4 letter codes
+
+const https = require('./https');
+const fs = require('fs');
+const path = require('path');
+
+// immediately invoked function so we can access async/await
+const start = async () => {
+	// load the list of states
+	const states = ['AK', 'NC', 'VA', 'TX', 'GA', 'PR'];
+	// const states = require('./stations-states.js');
+
+	let output = {};
+	// loop through states
+	await Promise.all(states.map(async (state) => {
+		try {
+			// get list and parse the JSON
+			const stationsRaw = await https(`https://api.weather.gov/stations?state=${state}`);
+			const stationsAll = JSON.parse(stationsRaw).features;
+			// filter stations for 4 letter identifiers
+			const stations = stationsAll.filter(station => station.properties.stationIdentifier.match(/^[A-Z]{4}$/));
+			// add each resulting station to the output
+			stations.forEach(station => {
+				const id = station.properties.stationIdentifier;
+				if (output[id]) {
+					console.log(`Duplicate station: ${state}-${id}`);
+					return;
+				}
+				output[id] = {
+					id,
+					city: station.properties.name,
+					state: state,
+					lat: station.geometry.coordinates[1],
+					lon: station.geometry.coordinates[0],
+				};
+			});
+			console.log(`Complete: ${state}`);
+		} catch (e) {
+			console.error(`Unable to get state: ${state}`);
+			return false;
+		}
+	}));
+
+	// write the output
+	fs.writeFileSync(path.join(__dirname, 'output/stations.js'), JSON.stringify(output, null, 2));
+
+};
+
+// immediately invoked function allows access to async
+(async () => {
+	await start();
+})();
+