diff --git a/envi/envi.h b/envi/envi.h
index d7a1f37..eb4a468 100644
--- a/envi/envi.h
+++ b/envi/envi.h
@@ -574,16 +574,66 @@ public:
 		if(header.interleave == envi_header::BSQ){		//if the infile is bsq file
 			if(header.data_type ==envi_header::float32)
 				return ((bsq<float>*)file)->band((float*)ptr, wavelength);
-
+			else if (header.data_type == envi_header::float64)
+				return ((bsq<double>*)file)->band((double*)ptr, wavelength);
+			else{
+				std::cout << "ERROR: unidentified data type" << std::endl;
+				exit(1);
+			}
+		}
+		else if (header.interleave == envi_header::BIL){
+			if (header.data_type == envi_header::float32)
+				return ((bil<float>*)file)->band((float*)ptr, wavelength);
+			else if (header.data_type == envi_header::float64)
+				return ((bil<double>*)file)->band((double*)ptr, wavelength);
+			else{
+				std::cout << "ERROR: unidentified data type" << std::endl;
+				exit(1);
+			}
+		}
+		else if (header.interleave == envi_header::BIP){
+			if (header.data_type == envi_header::float32)
+				return ((bip<float>*)file)->band((float*)ptr, wavelength);
+			else if (header.data_type == envi_header::float64)
+				return ((bip<double>*)file)->band((double*)ptr, wavelength);
+			else{
+				std::cout << "ERROR: unidentified data type" << std::endl;
+				exit(1);
+			}
 		}
 		return false;
 	}
 
 	bool band_index(void* ptr, unsigned int b){
-		if(header.interleave == envi_header::BSQ){		//if the infile is bsq file
-			if(header.data_type ==envi_header::float32)
+		if (header.interleave == envi_header::BSQ){		//if the infile is bsq file
+			if (header.data_type == envi_header::float32)
 				return ((bsq<float>*)file)->band_index((float*)ptr, b);
-
+			else if (header.data_type == envi_header::float64)
+				return ((bsq<double>*)file)->band_index((double*)ptr, b);
+			else{
+				std::cout << "ERROR: unidentified data type" << std::endl;
+				exit(1);
+			}
+		}
+		else if (header.interleave == envi_header::BIL){
+			if (header.data_type == envi_header::float32)
+				return ((bil<float>*)file)->band_index((float*)ptr, b);
+			else if (header.data_type == envi_header::float64)
+				return ((bil<double>*)file)->band_index((double*)ptr, b);
+			else{
+				std::cout << "ERROR: unidentified data type" << std::endl;
+				exit(1);
+			}
+		}
+		else if (header.interleave == envi_header::BIP){
+			if (header.data_type == envi_header::float32)
+				return ((bip<float>*)file)->band_index((float*)ptr, b);
+			else if (header.data_type == envi_header::float64)
+				return ((bip<double>*)file)->band_index((double*)ptr, b);
+			else{
+				std::cout << "ERROR: unidentified data type" << std::endl;
+				exit(1);
+			}
 		}
 		return false;
 	}
--
libgit2 0.21.4