reverse Geocoding example with typescript

package.json

{
  "name": "3_tsconfig",
  "version": "1.0.0",
  "description": "",
  "main": "old.js",
  "scripts": {
    "demo": "tsc && node build/js/reverseGeo.js 'Stuttgart, Germany'"
  },
  "author": "",
  "license": "Apache-2.0",
  "devDependencies": {
    "@types/node": "^6.0.45"
  },
  "dependencies": {
    "request": "^2.75.0"
  }
}

reverseGeo.ts

var request = require('request');

var reverseGeocode = function (locationName, callback) {
    request({
        uri: "http://nominatim.openstreetmap.org/search?format=json&q=" + locationName,
        json: true
    }, function (err, response, body) {
        if (err) { return callback(err, null); }
        else {
            if (body && body.length) {
                return callback(null, body[0])
            } else {
                return callback("response is no array", null);
            }
        }
    });
}

var param = process.argv;

if (!param) {
    console.log('No parameter. Add location as parameter string (e.g. "Stuttgart, Germany")');
    process.exit();
}

reverseGeocode(param, function (err, data) {
    if (err) {
        console.log("Error: ", err);
        return;
    }

    var result = { importance: data.importance, type: data.type, lat: data.lat, lon: data.lon };

    console.log(result);
});

tsconfig.json

{
    "compilerOptions": {
        "target": "es5",
        "module": "commonjs",
        "removeComments": true,
        "typeRoots": [
            "node_modules/@types"
        ],
        "outDir": "build/js",
        "inlineSourceMap": true
    },
    "exclude": [
        "node_modules"
    ]
}