diff --git a/data_stream_xml_generation/generate_xml_datm.py b/data_stream_xml_generation/generate_xml_datm.py
index ddd4f61..6c648be 100644
--- a/data_stream_xml_generation/generate_xml_datm.py
+++ b/data_stream_xml_generation/generate_xml_datm.py
@@ -104,7 +104,11 @@
             SubElement(stream_info, "dtlimit").text = "1.0"
 
     SubElement(stream_info, "readmode").text = "single"
-    SubElement(stream_info, "mapalgo").text = "bilinear"
+    if stream_name in STREAMS_AVE:
+        SubElement(stream_info, "mapalgo").text = "consf"
+    else:
+        SubElement(stream_info, "mapalgo").text = "patch"
+
     SubElement(stream_info, "year_first").text = str(year_first)
     SubElement(stream_info, "year_last").text = str(year_last)
     SubElement(stream_info, "year_align").text = str(year_align)
diff --git a/data_stream_xml_generation/generate_xml_drof.py b/data_stream_xml_generation/generate_xml_drof.py
index 1f25f80..0e058f6 100644
--- a/data_stream_xml_generation/generate_xml_drof.py
+++ b/data_stream_xml_generation/generate_xml_drof.py
@@ -72,7 +72,7 @@
     SubElement(stream_info, "tintalgo").text = "linear"
     SubElement(stream_info, "offset").text = "0"
     SubElement(stream_info, "readmode").text = "single"
-    SubElement(stream_info, "mapalgo").text = "bilinear"
+    SubElement(stream_info, "mapalgo").text = "consd"
     SubElement(stream_info, "year_first").text = str(year_first)
     SubElement(stream_info, "year_last").text = str(year_last)
     SubElement(stream_info, "year_align").text = str(year_align)