diff -rupN --no-dereference libLAS-d76a061f33a69a36ab116cd939c5d444b301efd8/src/spatialreference.cpp libLAS-d76a061f33a69a36ab116cd939c5d444b301efd8-new/src/spatialreference.cpp
--- libLAS-d76a061f33a69a36ab116cd939c5d444b301efd8/src/spatialreference.cpp	2020-06-08 11:37:26.837015849 +0200
+++ libLAS-d76a061f33a69a36ab116cd939c5d444b301efd8-new/src/spatialreference.cpp	2020-06-08 11:37:26.839015824 +0200
@@ -522,14 +522,14 @@ const GTIF* SpatialReference::GetGTIF()
         }
 
         if (uid == record.GetUserId(true).c_str() &&
-            34736 == record.GetRecordId())
+            34736 == record.GetRecordId() && !data.empty())
         {
             int count = data.size() / sizeof(double);
             ST_SetKey(m_tiff, record.GetRecordId(), count, STT_DOUBLE, &(data[0]));
         }
 
         if (uid == record.GetUserId(true).c_str() &&
-            34737 == record.GetRecordId())
+            34737 == record.GetRecordId() && !data.empty())
         {
             int count = data.size()/sizeof(uint8_t);
             ST_SetKey(m_tiff, record.GetRecordId(), count, STT_ASCII, &(data[0]));