Lines on a map

import Foundation
import UIKit
import TrimbleMaps
import TrimbleMapsAccounts

class LinesOnAMapViewController: UIViewController, AccountManagerDelegate, TMGLMapViewDelegate {

    internal var mapView: TMGLMapView!

    let SOURCE_ID = "tristatepoints"
    let LAYER_ID = "tristatepoints"

    override func viewDidLoad() {
        super.viewDidLoad()

        let apiKey =  "Your-API-key-here"
        let account = Account(apiKey: apiKey, region: Region.northAmerica)
        AccountManager.default.account = account
        AccountManager.default.delegate = self
    }

    func stateChanged(newStatus: AccountManagerState) {
        if newStatus == .loaded {
            DispatchQueue.main.async {
                // Create a map view
                self.mapView = TMGLMapView(frame: self.view.bounds)
                self.mapView.delegate = self

                // Set the map location
                let center = CLLocationCoordinate2D(latitude: 40.60902838712187, longitude: -97.73800045737227)
                self.mapView.setCenter(center, zoomLevel: 2.5, animated: false)

                // Add the map
                self.view.addSubview(self.mapView)
            }
        }
    }

    func mapViewDidFinishLoadingMap(_ mapView: TMGLMapView) {
        // In this example a .json file is being used as the source

        let filePath = Bundle.main.path(forResource: "lines", ofType: "json")!
        let fileUrl = URL(fileURLWithPath: filePath)

        // Create a source and add it to the style. Important to note, sources are linked to styles.
        // If you change the style you may need to re-add your source and layers
        let shapeSource = TMGLShapeSource(identifier: SOURCE_ID, url: fileUrl, options: .none)
        mapView.style?.addSource(shapeSource)

        // Create a LineLayer to display our source information.
        let lineLayer = TMGLLineStyleLayer(identifier: LAYER_ID, source: shapeSource)
        lineLayer.lineWidth = NSExpression(forConstantValue: 6)
        lineLayer.lineColor = NSExpression(forConstantValue: UIColor.blue)
        lineLayer.lineOpacity = NSExpression(forConstantValue: 0.8)

        // add the layer
        mapView.style?.addLayer(lineLayer)
    }

}

{
  "type": "FeatureCollection",
  "features": [
    {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "LineString",
        "coordinates": [
          [-119.091796875, 44.08758502824516],
          [-108.80859375, 44.213709909702054],
          [-114.2578125, 44.213709909702054],
          [-113.90625, 36.31512514748051]
        ]
      }
    },
    {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "LineString",
        "coordinates": [
          [-111.09374999999999, 36.94989178681327],
          [-111.357421875, 42.5530802889558],
          [-107.138671875, 41.83682786072714],
          [-108.10546875, 39.36827914916014],
          [-111.005859375, 39.30029918615029],
          [-108.017578125, 36.80928470205937]
        ]
      }
    },
    {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "LineString",
        "coordinates": [
          [-105.64453124999999, 42.22851735620852],
          [-100.1953125, 42.35854391749705],
          [-102.919921875, 42.22851735620852],
          [-103.0078125, 36.94989178681327],
          [-105.908203125, 37.020098201368114],
          [-99.931640625, 36.94989178681327]
        ]
      }
    },
    {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "LineString",
        "coordinates": [
          [-98.349609375, 36.87962060502676],
          [-98.173828125, 42.48830197960227],
          [-95.80078125, 39.33429742980725],
          [-94.0869140625, 42.5530802889558],
          [-94.04296874999999, 37.055177106660814]
        ]
      }
    },
    {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "LineString",
        "coordinates": [
          [-92.548828125, 42.48830197960227],
          [-92.548828125, 36.73888412439431],
          [-89.1650390625, 37.26530995561875],
          [-89.4287109375, 39.50404070558415],
          [-92.021484375, 39.842286020743394],
          [-89.384765625, 40.51379915504413],
          [-89.384765625, 42.391008609205045],
          [-92.493896484375, 42.49640294093705]
        ]
      }
    },
    {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "LineString",
        "coordinates": [
          [-87.4072265625, 42.35854391749705],
          [-87.9345703125, 37.23032838760387],
          [-83.583984375, 37.19533058280065]
        ]
      }
    },
    {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "LineString",
        "coordinates": [
          [-78.837890625, 37.33522435930639],
          [-82.4853515625, 37.3002752813443],
          [-82.44140625, 39.774769485295465],
          [-79.27734374999999, 39.70718665682654],
          [-82.44140625, 40.01078714046552],
          [-82.3974609375, 41.705728515237524],
          [-79.1455078125, 41.672911819602085]
        ]
      }
    }
  ]
}