anchor.diff:      </trkseg>
     </trk>
   </gpx>
  +--XXXXXXXX
  +Content-Disposition: form-data; name="file2"; filename="test.umap"
  +Content-Type: application/json
  +
  +{
  +  "type": "umap",
  +  "properties": {
  +    "name": "Umap test"
  +  },
  +  "layers": [
  +    {
  +      "type": "FeatureCollection",
  +      "features": [
  +        {
  +          "type": "Feature",
  +          "properties": {},
  +          "geometry": {
  +            "type": "Point",
  +            "coordinates": [
  +              8.535261,
  +              52.026977
  +            ]
  +          }
  +        }
  +      ],
  +      "_umap_options": {
  +        "name": "Layer 1"
  +      }
  +    }
  +  ]
  +}
   --XXXXXXXX--
   ----
   
  
positive.code:     "paper_size": "Din A1"
  }
  --XXXXXXXX
  Content-Disposition: form-data; name="track"; filename="test.gpx"
  Content-Type: application/gpx+xml
  
  <?xml version="1.0" encoding="UTF-8"?>
  
negative.code: layout:: Map layout to use (default: "plain")
  style:: Map base style to use (default: "CartoOSM")
  overlays:: List of overlays to put on top of base style (default: None)
  paper_height:: Paper height in mm
  paper_width:: Paper width in mm
  paper_size:: Predefined paper size to use (default: "Din A4" 210x297mm²)
  orientation:: Paper orientation: "portrait" or "landscape" when using a predefined paper size (default: "portrait")
  import_url:: URL pointing to an import file in one of the supported formats
  track_url:: URL pointing to a GPX track to download and print (deprecated)
  umap_url:: URL pointing to an Umap export file do download and print (deprecated)
  
  It is also possible import files directly using a multipart/form-data POST request.
  In this case you have to submit the actual API JSON as a post parameter
  named "json", and add file fields using whatever field name you like.
  
  Supported import file formats for now are GPX tracks, Umap map exports, and POI
  files as generated by the "Umgebungsplaene" neighborhood POI web application.
  
  After successfully submitting a request you can either poll the job result API every
  once in a while until it either returns the "200 OK" status, or a 4xx error code.
  