Add and process school data

scripts/csvToGeojson.ts

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+import {parse} from 'csv-parse/sync';
+import {readFileSync} from "fs";
+
+var lambert72toWGS84 = function(x, y){
+
+    var newLongitude, newLatitude;
+
+    var n = 0.77164219,
+        F = 1.81329763,
+        thetaFudge = 0.00014204,
+        e = 0.08199189,
+        a = 6378388,
+        xDiff = 149910,
+        yDiff = 5400150,
+        theta0 = 0.07604294;
+
+    var xReal = xDiff - x,
+        yReal = yDiff - y;
+
+    var rho = Math.sqrt(xReal * xReal + yReal * yReal),
+        theta = Math.atan(xReal / -yReal);
+
+    newLongitude = (theta0 + (theta + thetaFudge) / n) * 180 / Math.PI;
+    newLatitude = 0;
+
+    for (var i = 0; i < 5 ; ++i) {
+        newLatitude = (2 * Math.atan(Math.pow(F * a / rho, 1 / n) * Math.pow((1 + e * Math.sin(newLatitude)) / (1 - e * Math.sin(newLatitude)), e / 2))) - Math.PI / 2;
+    }
+    newLatitude *= 180 / Math.PI;
+    return [newLongitude, newLatitude];
+
+}
+
+function main(args: string[]): void {
+
+    
+    
+    if (args.length == 0) {
+   /*     args = ["/home/pietervdvn/Downloads/Scholen/aantallen.csv",
+            "/home/pietervdvn/Downloads/Scholen/perschool.csv",
+            "/home/pietervdvn/Downloads/Scholen/Vestigingsplaatsen-van-scholen-gewoon-secundair-onderwijs-cleaned.csv"]
+    */
+    console.log("Usage: csvToGeojson input.csv name-of-lat-field name-of-lon-field")
+        return
+    }
+    
+    let file =  args[0]
+    if(file.startsWith("file://")){
+        file = file.substr("file://".length)
+    }
+    const latField = args[1]
+    const lonField = args[2]
+    
+    const csvOptions = {
+        columns: true,
+        skip_empty_lines: true,
+        trim: true
+    }
+    
+    const csv: Record<any, string>[] = parse(readFileSync(file), csvOptions)
+    
+   const features =  csv.map((csvElement, i) => {
+        const lat = Number(csvElement[latField])
+        const lon = Number(csvElement[lonField])
+       if(isNaN(lat) || isNaN(lon)){
+           throw `Not a valid lat or lon for entry ${i}: ${JSON.stringify(csvElement)}`
+       }
+       
+       
+
+       return {
+            type: "Feature",
+            properties: csvElement,
+            geometry: {
+                type: "Point",
+                coordinates: lambert72toWGS84(lon, lat)
+            }
+        }
+        
+    })
+    
+    console.log(JSON.stringify({
+        type: "FeatureCollection",
+        features
+    }))
+
+}
+
+main(process.argv.slice(2))