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Django-Mapengine

django-mapengine is a Django app to provide library for maplibre in backend. This includes

  • html templates and JS files for maplibre
  • creation of maplibre sources and layers including choropleths,
  • provision of multi-vector-tiles from django models,
  • distilling of map source views
  • basic popups

Requirements

Maplibre must be installed (i.e. via npm) and provided as JS framework

Quick start

  1. Add "django_mapengine" to your INSTALLED_APPS setting like this:

    INSTALLED_APPS = [
     "...",
     'django_mapengine',
]

  2. Install maplibre-gl and pubsub-js dependency by:

    npm install maplibre-gl pubsub-js

    and copy JS and CSS to your static folder.

  3. Include URLs from django_mapengine to your project:

    urlpatterns = [
    "...",
    path("map/", include("django_mapengine.urls")),
]

  4. Configure map engine by setting zoom levels, regions and styles folder in project settings.py. You can see all possible settings by looking into django_mapengine.settings.py. Example settings:

    from django_mapengine import setup

MAP_ENGINE_CENTER_AT_STARTUP = [12.537917858911896, 51.80812518969171]
MAP_ENGINE_ZOOM_AT_STARTUP = 9
MAP_ENGINE_MAX_BOUNDS = [[11.280733017118229, 51.22918643452503], [13.616574868700604, 52.35515806663738]]

MAP_ENGINE_IMAGES = [setup.MapImage("wind", "images/icons/i_wind.png")]

MAP_ENGINE_API_MVTS = {
    "municipality":
        [
            setup.MVTAPI("municipality", "map", "Municipality"),
            setup.MVTAPI("municipalitylabel", "map", "Municipality", "label_tiles"),
        ],
    "results": [setup.MVTAPI("results", "map", "Municipality")]
}

MAP_ENGINE_API_CLUSTERS = [
    setup.ClusterAPI("wind", "map", "WindTurbine"),
    setup.ClusterAPI("pvroof", "map", "PVroof"),
    setup.ClusterAPI("pvground", "map", "PVground"),
    setup.ClusterAPI("hydro", "map", "Hydro"),
    setup.ClusterAPI("biomass", "map", "Biomass"),
    setup.ClusterAPI("combustion", "map", "Combustion"),
]

MAP_ENGINE_STYLES_FOLDER = "digiplan/static/config/"
MAP_ENGINE_ZOOM_LEVELS = {
   "municipality": core.Zoom(8, 12),
}

MAP_ENGINE_POPUPS = ["results"]

  5. Add middleware to your middleware setup before Whitenoise middleware (or other static server middleware):

    MIDDLEWARE = [
    "django.middleware.security.SecurityMiddleware",
    "django_mapengine.django_mapengine.middleware.MapEngineMiddleware",
    "whitenoise.middleware.WhiteNoiseMiddleware",
    ...
]

  6. Add maplibre-gl, pubsub-js and mapengine JS, CSS and JSONs in template by:

    {% block javascript %}
  {{ block.super }}
  {% compress js %}
    <script src="{% static 'vendors/maplibre/js/maplibre-gl.js' %}"></script>
    <script src="{% static 'vendors/pubsub/js/pubsub.js' %}"></script>
  {% endcompress %}
{% endblock javascript %}

{%  block inline_javascript %}
  {% include 'django_mapengine/map_json.html' %}
  {% compress js %}
    {% include 'django_mapengine/map_js.html' %}
  {% endcompress %}
{% endblock %}

{% block css %}
  {% compress css %}
    <link href="{% static 'vendors/maplibre/css/maplibre-gl.css' %}" rel='stylesheet'/>
  {% endcompress %}
{% endblock css %}

  7. If you want to integrate basemaps to your map add the following to the corresponding places:

    <script src="{% static 'django_mapengine/js/basemaps.js' %}" type="text/javascript"></script>
{% include 'django_mapengine/map_basemaps.html'}

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