BangleApps/apps/waypoints

Waypoints

This app provides a common way to set up the waypoints.json file, which several other apps rely on for navigation.

Waypoint JSON file

When the app is loaded from the app loader, a file named waypoints.json is loaded along with the javascript etc. The file has the following contents:

[
  {
  "name":"NONE"
  },
  {
  "name":"No10",
  "lat":51.5032,
  "lon":-0.1269
  },
  {
  "name":"Stone",
  "lat":51.1788,
  "lon":-1.8260
  },
  { "name":"WP0" },
  { "name":"WP1" },
  { "name":"WP2" },
  { "name":"WP3" },
  { "name":"WP4" }
]

The file contains the initial NONE waypoint which is useful if you just want to display course and speed. The next two entries are waypoints to No 10 Downing Street and to Stone Henge - obtained from Google Maps. The last five entries are entries which can be marked.

You add and delete entries using the Web IDE to load and then save the file from and to watch storage. The app itself does not limit the number of entries although it does load the entire file into RAM which will obviously limit this.

Waypoint Editor

Clicking on the download icon of Waypoints in the app loader invokes the waypoint editor. The editor downloads and displays the current waypoints.json file. Clicking the Edit button beside an entry causes the entry to be deleted from the list and displayed in the edit boxes. It can be restored - by clicking the Add waypoint button. A new markable entry is created by using the Add name button. The edited waypoints.json file is uploaded to the Bangle by clicking the Upload button.