diff --git a/include/boost/gil/extension/io/formats/tiff/reader_backend.hpp b/include/boost/gil/extension/io/formats/tiff/reader_backend.hpp
index 050255e5b..5bc957c6c 100644
--- a/include/boost/gil/extension/io/formats/tiff/reader_backend.hpp
+++ b/include/boost/gil/extension/io/formats/tiff/reader_backend.hpp
@@ -101,6 +101,13 @@ public:
             io_error_if( !_io_dev.template get_property< tiff_tile_length >( _info._tile_length )
                         , "cannot read tiff_tile_length tag." );
         }
+
+				io_error_if( _io_dev.template get_property<tiff_resolution_unit> ( _info._resolution_unit) == false
+					, "cannot read tiff tag");
+				io_error_if( _io_dev. template get_property<tiff_x_resolution>( _info._x_resolution ) == false
+					, "cannot read tiff tag" );
+				io_error_if( _io_dev. template get_property<tiff_y_resolution>( _info._y_resolution ) == false
+					, "cannot read tiff tag" );
     }
 
     /// Check if image is large enough.
diff --git a/include/boost/gil/extension/io/formats/tiff/writer_backend.hpp b/include/boost/gil/extension/io/formats/tiff/writer_backend.hpp
index d96bdf285..1bbe55343 100644
--- a/include/boost/gil/extension/io/formats/tiff/writer_backend.hpp
+++ b/include/boost/gil/extension/io/formats/tiff/writer_backend.hpp
@@ -116,9 +116,10 @@ protected:
         // write rows per strip
         this->_io_dev.template set_property<tiff_rows_per_strip>( this->_io_dev.get_default_strip_size() );
 
-        // x, y resolution
-        this->_io_dev.template set_property<tiff_x_resolution>( this->_info._x_resolution );
-        this->_io_dev.template set_property<tiff_y_resolution>( this->_info._y_resolution );
+        // write x, y resolution and units
+				this->_io_dev.template set_property<tiff_resolution_unit>( this->_info._resolution_unit );
+				this->_io_dev.template set_property<tiff_x_resolution>( this->_info._x_resolution );
+				this->_io_dev.template set_property<tiff_y_resolution>( this->_info._y_resolution );
     }
 
 
diff --git a/include/boost/gil/extension/io/tiff_tags.hpp b/include/boost/gil/extension/io/tiff_tags.hpp
index b4ef467db..2a29dd5c8 100644
--- a/include/boost/gil/extension/io/tiff_tags.hpp
+++ b/include/boost/gil/extension/io/tiff_tags.hpp
@@ -125,7 +125,13 @@ struct tiff_x_resolution : tiff_property_base< float, TIFFTAG_XRESOLUTION > {};
 struct tiff_y_resolution : tiff_property_base< float, TIFFTAG_YRESOLUTION > {};
 
 /// Defines type for resolution unit property.
-struct tiff_resolution_unit : tiff_property_base< uint16_t, TIFFTAG_RESOLUTIONUNIT > {};
+		enum class tiff_resolution_unit_value: std:: uint16_t {
+			NONE = RESUNIT_NONE,
+				INCH = RESUNIT_INCH,
+				CENTIMETRE = RESUNIT_CENTIMETER
+				};
+		struct tiff_resolution_unit : tiff_property_base< tiff_resolution_unit_value, TIFFTAG_RESOLUTIONUNIT > {
+		};
 
 /// Defines type for planar configuration property.
 struct tiff_planar_configuration : tiff_property_base< uint16_t, TIFFTAG_PLANARCONFIG > {};
@@ -218,6 +224,10 @@ struct image_read_info< tiff_tag >
 
     , _tile_width ( 0 )
     , _tile_length( 0 )
+
+    , _x_resolution( 0 )
+    , _y_resolution( 0 )
+    , _resolution_unit( tiff_resolution_unit_value:: NONE )
     {}
 
     /// The number of rows of pixels in the image.
@@ -247,6 +257,10 @@ struct image_read_info< tiff_tag >
     tiff_tile_width::type _tile_width;
     /// Tile length
     tiff_tile_length::type _tile_length;
+
+    tiff_x_resolution::type _x_resolution;
+    tiff_y_resolution::type _y_resolution;
+    tiff_resolution_unit::type _resolution_unit;
 };
 
 /// Read settings for tiff images.
@@ -279,9 +293,9 @@ struct image_read_settings< tiff_tag > : public image_read_settings_base
     tiff_directory::type _directory;
 };
 
-/// Read settings for tiff images.
+/// Write settings for tiff images.
 ///
-/// The structure can be used for all read_xxx functions, except read_image_info.
+/// The structure can be used for all write_xxx functions, except write_image_info.
 template< typename Log >
 struct image_write_info< tiff_tag, Log >
 {
@@ -298,6 +312,7 @@ struct image_write_info< tiff_tag, Log >
     , _tile_length               ( 0 )
     , _x_resolution              ( 0 )
     , _y_resolution              ( 0 )
+		, _resolution_unit           ( tiff_resolution_unit_value::NONE )
     {}
 
     /// The color space of the image data.
@@ -321,6 +336,7 @@ struct image_write_info< tiff_tag, Log >
     /// x, y resolution
     tiff_x_resolution::type               _x_resolution;
     tiff_y_resolution::type               _y_resolution;
+    tiff_resolution_unit::type            _resolution_unit;
 
 	/// A log to transcript error and warning messages issued by libtiff.
     Log                                   _log;