diff --git a/src/main/java/org/gcube/dataanalysis/geo/insertion/ThreddsFetcher.java b/src/main/java/org/gcube/dataanalysis/geo/insertion/ThreddsFetcher.java
index acde6a4..636fc48 100644
--- a/src/main/java/org/gcube/dataanalysis/geo/insertion/ThreddsFetcher.java
+++ b/src/main/java/org/gcube/dataanalysis/geo/insertion/ThreddsFetcher.java
@@ -127,7 +127,7 @@ public class ThreddsFetcher {
 					metadataInserter.setYRightUpper(maxY);
 					
 					//set keywords
-					metadataInserter.setCustomTopics(filename, description,numberOfDimensions+"D",gds.getTitle(),gds.getDescription());
+					metadataInserter.setCustomTopics(filename, description,numberOfDimensions+"D",gds.getTitle(),gds.getDescription(),"unit:"+gdt.getUnitsString().trim());
 					//set Temporal Extent
 					if (hStartDate!=null){
 						metadataInserter.setStartDate(dr.getStart().getDate());