1 files changed, 9 insertions, 4 deletions
diff --git a/webmap-import b/webmap-import
index 5cfe003..1cf9def 100755
--- a/webmap-import
+++ b/webmap-import
@@ -929,15 +929,20 @@ def importSource2(lyr_dst, path, args={}, basedir=None, extent=None):
             fld.SetIgnored(True)
     defn = None
 
+    count0 = -1
+    if lyr.TestCapability(ogr.OLCFastFeatureCount):
+        count0 = lyr.GetFeatureCount(force=0)
+
+    if count0 == 0 and len(fieldSet) == 0:
+        # skip the below warning in some cases (e.g., GeoJSON source)
+        logging.info('Source layer "%s" has no fields nor features, skipping', layername)
+        return
+
     logging.debug('Field map: %s', str(fieldMap))
     for fld in fields:
         if not fld in fieldSet:
             logging.warning('Source layer "%s" has no field named "%s", ignoring', layername, fld)
 
-    count0 = -1
-    if lyr.TestCapability(ogr.OLCFastFeatureCount):
-        count0 = lyr.GetFeatureCount(force=0)
-
     count1 = -1
     if args.get('spatial-filter', True) and extent is not None:
         if extent.GetSpatialReference().IsSame(srs):