diff --git a/components/iscesys/ImageApi/DataAccessor/DataAccessorPy.py b/components/iscesys/ImageApi/DataAccessor/DataAccessorPy.py
index b0c3be87..8a3b859c 100755
--- a/components/iscesys/ImageApi/DataAccessor/DataAccessorPy.py
+++ b/components/iscesys/ImageApi/DataAccessor/DataAccessorPy.py
@@ -142,7 +142,12 @@ def createAccessor(self):
         caster = '' or self.caster
         filename = self.filename
         scheme = self.scheme
-        self.extraFilename = self.filename + '.' + self._extra_reader
+        #if the filename is a URL, the extraFilename should indicate the file from the local machine
+        #instead of from the remote server.
+        if self.filename.startswith('http://') or self.filename.startswith('https://'):
+            self.extraFilename = os.path.basename(self.filename) + '.' + self._extra_reader
+        else:
+            self.extraFilename = self.filename + '.' + self._extra_reader
 
         if self._accessor is None:#to avoid creating duplicates
             selection = self.methodSelector()