Tethys Platform
Table Of Contents
Table Of Contents

Spatial Input

Last Updated: June 2020

1. Spatial Input Controller

Add a new controller to the controller.py module:

@controller
def draw(request):
    drawing_options = MVDraw(
        controls=['Modify', 'Move', 'Point', 'LineString', 'Polygon', 'Box'],
        initial='Polygon'
    )

    map_options = MapView(
        height='450px',
        width='100%',
        layers=[],
        draw=drawing_options
    )

    geometry = ''

    if request.POST and 'geometry' in request.POST:
        geometry = request.POST['geometry']

    context = {'map_options': map_options,
               'geometry': geometry}

    return render(request, 'geoserver_app/draw.html', context)

2. Spatial Input Template

Create a new draw.html template in your template directory and add the following contents:

{% extends "geoserver_app/base.html" %}
{% load tethys_gizmos %}

{% block app_content %}
    <h1>Draw on the Map</h1>

    {% if geometry %}
        <p>{{ geometry }}</p>
    {% endif %}

    <form method="post">
        {% csrf_token %}
        {% gizmo map_view map_options %}
        <input name="submit" type="submit" class="btn btn-primary mt-3">
    </form>
{% endblock %}

4. Test Spatial Input Page

Navigate to the spatial input page using the "Draw" link in your navigation (http://localhost:8000/apps/geoserver-app/draw/). Use the drawing controls to add features to the map, then press the submit button. The GeoJSON encoded spatial data should be displayed when the page refreshes.

5. Solution

This concludes the this part of the GeoServer tutorial. You can view the solution on GitHub at https://github.com/tethysplatform/tethysapp-geoserver_app or clone it as follows:

git clone https://github.com/tethysplatform/tethysapp-geoserver_app.git
cd tethysapp-geoserver_app
git checkout -b map-draw-solution map-draw-solution-3.4