Usage

Add wagtailosm and osm_field to your INSTALLED_APPS:

INSTALLED_APPS = (
    # ...
    'osm_field',
    'wagtailosm',
    # ...
)

The order does not matter, but we need both of these applications to be registered because they contain static files.

To have a field with a map displayed in Wagtail, do this:

class Country(Page):

    # If you are adding this field to an existing model, you need to define some
    # default location for populating existing rows in the migration.
    DEFAULT_LAT, DEFAULT_LON = (52.4864, 13.4385)

    location = OSMField(default=(DEFAULT_LAT, DEFAULT_LON), lat_field='latitude', lon_field='longitude')
    latitude = LatitudeField(default=DEFAULT_LAT)
    longitude = LongitudeField(default=DEFAULT_LON)

    # This is handled by the map, but don't forget you will probably need
    # to be able to customize this...
    zoom_level = models.PositiveSmallIntegerField(default=15)

    # Add to Wagtail admin's panels
    content_panels = Page.content_panels + [
        FieldPanel('location', widget=osm_field.fields.OSMWidget('latitude', 'longitude'), classname="wagtailosm-location"),
        FieldPanel('latitude', classname="wagtailosm-hidden"),
        FieldPanel('longitude', classname="wagtailosm-hidden"),
    ]