title: GeoDjango admin: show PointField on a map?
body: <p>I have a PointField (<code>position</code>) in my Django model. I would like to display it as a read-only map in my Django admin interface. However, whenever I set it to be read-only, it's displaying as text. </p>
  
  <p>This is my definition in admin.py:</p>
  
  <pre><code>class PostcodeAdmin(admin.ModelAdmin):
      list_display = ('postcode', 'position', )
      fields = ['postcode', 'position']
      readonly_fields = ['postcode', 'position']
  </code></pre>
  
  <p>Whenever I remove it from the list of read-only fields, it displays on a map: whenever I set it to be read-only, it displays as text. </p>
  
  <p>Is it possible to have it is a read-only map? I'm using Django 1.7. </p>