# World Map Configuration

LibreNMS comes with a configurable Geo Map based on World Map Widget
to visualize where your equipment is located geographically.

## World Map Widget

World Map Widget, requires you to have properly formatted addresses in
sysLocation or sysLocation override. As part of the standard poller
these addresses will be Geocoded by Google and stored in the database.

Location resolution happens as follows

1. If `device['location']` contains `[lat, lng]` (note the square
   brackets), that is used
1. If there is a location overide for the device in the WebUI and it
   contains `[lat, lng]` (note the square brackets), that is used.
1. Attempt to resolve lat, lng using `$config['geoloc']['engine']`
1. Properly formatted addresses in sysLocation or sysLocation
   override, under device settings.

Example:

```
[40.424521, -86.912755]
```

or

```
1100 Congress Ave, Austin, TX 78701
```

We have two current mapping engines available:

- Leaflet (default)
- Jquery-Mapael

### World Map Widget Settings

- *Initial Latitude / Longitude*: The map will be centered on those
  coordinates.
- *Initial Zoom*: Initial zoom of the map. [More information about
  zoom levels](https://wiki.openstreetmap.org/wiki/Zoom_levels).
- *Grouping radius*: Markers are grouped by area. This value define
  the maximum size of grouping areas.
- *Show devices*: Show devices based on there status.

Example Settings:

![Example World Map Settings](/img/world-map-widget-settings.png)

## Offline OpenStreet Map

If you can't access OpenStreet map directly you can run a local [tile
server](http://wiki.openstreetmap.org/wiki/Tile_servers). To specify a
different url you can set:

```php
$config['leaflet']['tile_url'] = 'localhost.com';
```

## Additional Leaflet config

```php
$config['map']['engine']                                = "leaflet";
$config['leaflet']['default_lat']                       = "51.981074";
$config['leaflet']['default_lng']                       = "5.350342";
$config['leaflet']['default_zoom']                      = 8;
// Device grouping radius in KM default 80KM
$config['leaflet']['group_radius']                      = 1;
```

## Geocode engine config

```php
$config['geoloc']['engine']  = "google"; // Valid options are google, mapquest or bing
$config['geoloc']['api_key'] = "abcdefghijklmnopqrstuvwxyz";
```

Google:  
Pros: fast, accurate  
Cons: requires a credit card even for a free account

MapQuest:  
Pros: free, no credit card required  
Cons: inaccurate: most addresses are returned as locations at the center of the US

Bing:  
Pros: free, no credit card required, accurate  
Cons: Microsoft (debatable)

## Jquery-Mapael config

Further custom options are available to load different maps of the
world, set default coordinates of where the map will zoom and the zoom
level by default. An example of this is:

```php
$config['map']['engine']          = "jquery-mapael";
$config['mapael']['default_map']  = 'mapael-maps/united_kingdom/united_kingdom.js';
$config['mapael']['map_width']    = 400;
$config['mapael']['default_lat']  = '50.898482';
$config['mapael']['default_lng']  = '-3.401402';
$config['mapael']['default_zoom'] = 20;
```

A list of maps can be found in ```html/js/maps/``` or ```html/js/mapael-maps/```.
