Handle the case where no observations are found.

Artdatabanken returns an empty response in that case (Content-Length: 0),
but we need a valid GeoJSON file without any features.

Unfortunately QGIS appears unable to load such files though, due to the
‘|subset=’ filter which references unknown fields.

1 files changed, 4 insertions, 1 deletions

diff --git a/gis-observation-map b/gis-observation-map
index 91abd1e..966d438 100755
--- a/gis-observation-map
+++ b/gis-observation-map
@@ -427,7 +427,10 @@ def getObservations(taxonLists, taxonRedlistCategories, searchFilter):
     )
 
     resp.raise_for_status()
-    obs = resp.json()
+    if resp.text == '':
+        obs = { 'crs': 'EPSG:4326', 'type': 'FeatureCollection', 'features': [] }
+    else:
+        obs = resp.json()
 
     # https://www.rfc-editor.org/rfc/rfc7946
     if obs is None or type(obs) != dict or 'type' not in obs.keys():