diff --git a/bin/ui/wndMain.ui b/bin/ui/wndMain.ui
index eb2c9f5f7..0b2f2cfc1 100644
--- a/bin/ui/wndMain.ui
+++ b/bin/ui/wndMain.ui
@@ -249,6 +249,17 @@ If that is the case then randomisations would be invalidated for those analyses.
             <signal handler="on_basedata_attach_properties" name="activate"/>
           </object>
         </child>
+        <child>
+          <object class="GtkAction" id="menu_attach_basedata_group_properties_from_rasters">
+            <property name="name">menu_attach_basedata_group_properties_from_rasters</property>
+            <property name="tooltip" translatable="yes">Attach properties (e.g. environmental conditions) to the groups.
+It will only work if your basedata has no analysis outputs,
+as these might have used existing properties.
+If that is the case then randomisations would be invalidated for those analyses.  </property>
+            <property name="label" translatable="yes">Attach group properties from a set of rasters</property>
+            <signal handler="on_basedata_attach_group_properties_from_rasters" name="activate"/>
+          </object>
+        </child>
         <child>
           <object class="GtkAction" id="menu_attach_ranges_as_properties">
             <property name="name">menu_attach_ranges_as_properties</property>
@@ -751,6 +762,7 @@ This cannot be undone.  </property>
           <menuitem action="menu_rename_basedata_groups"/>
           <menuitem action="menu_binarise_basedata_elements"/>
           <menuitem action="menu_attach_basedata_properties"/>
+          <menuitem action="menu_attach_basedata_group_properties_from_rasters"/>
           <menuitem action="menu_attach_ranges_as_properties"/>
           <menuitem action="menu_attach_abundances_as_properties"/>
           <menuitem action="menu_delete_element_properties"/>
diff --git a/lib/Biodiverse/GUI/Callbacks.pm b/lib/Biodiverse/GUI/Callbacks.pm
index b9b412f6e..513a29a76 100644
--- a/lib/Biodiverse/GUI/Callbacks.pm
+++ b/lib/Biodiverse/GUI/Callbacks.pm
@@ -286,6 +286,9 @@ my %data_funcs = (
     on_basedata_attach_properties => {
         METHOD => 'do_basedata_attach_properties',
     },
+    on_basedata_attach_group_properties_from_rasters => {
+        METHOD => 'do_basedata_attach_group_properties_from_rasters',
+    },
     on_basedata_attach_label_abundances_as_properties => {
         METHOD => 'do_basedata_attach_label_abundances_as_properties',
     },
diff --git a/lib/Biodiverse/GUI/Manager/BaseDatas.pm b/lib/Biodiverse/GUI/Manager/BaseDatas.pm
index b80a72fa5..975dcf233 100644
--- a/lib/Biodiverse/GUI/Manager/BaseDatas.pm
+++ b/lib/Biodiverse/GUI/Manager/BaseDatas.pm
@@ -326,6 +326,68 @@ sub do_basedata_attach_properties {
     return;
 }
 
+sub do_basedata_attach_group_properties_from_rasters {
+    my $self = shift;
+
+    my $bd = $self->{project}->get_selected_base_data();
+    croak "Cannot add properties to Basedata with existing outputs\n"
+      . "Use the Duplicate Without Outputs option to create a copy without deleting the outputs.\n"
+      if $bd->get_output_ref_count;
+
+    
+    my $dlg = Gtk2::FileChooserDialog->new(
+        'Select one or more rasters',
+        undef,
+        'open',
+        'gtk-cancel' => 'cancel',
+        'gtk-ok'     => 'ok',
+    );
+    $dlg->set_select_multiple(1);
+
+    my $filter = Gtk2::FileFilter->new();
+    $filter->set_name("raster files");
+    foreach my $extension (qw /tif tiff img asc flt/) {
+        $filter->add_pattern("*.$extension");
+    }
+    $dlg->add_filter($filter);
+    $dlg->set_modal(1);
+    
+    my $response = $dlg->run;
+
+    return if !$response eq 'ok';
+    
+    my @raster_list = $dlg->get_filenames();
+
+    $dlg->destroy();
+
+    my $basedatas = $bd->assign_group_properties_from_rasters(
+        rasters          => \@raster_list,
+        #return_basedatas => $return_basedatas,
+    );
+
+    $self->set_dirty();
+
+    my $count = @raster_list;
+    my $summary_text
+      = "Assigned properties using $count rasters.\n"
+      . "If not all are assigned then check the respective "
+      . "extents and coordinate systems.";
+    my $summary_dlg  = Gtk2::MessageDialog->new(
+        $self->{gui},
+        'destroy-with-parent',
+        'info',    # message type
+        'ok',      # which set of buttons?
+        $summary_text,
+    );
+    $summary_dlg->set_title('Assigned properties');
+
+    $summary_dlg->run;
+    $summary_dlg->destroy;
+
+    return;
+}
+
+
 sub do_delete_element_properties {
     my $self = shift;
     my $bd   = $self->{project}->get_selected_base_data;
diff --git a/lib/Biodiverse/GUI/Project.pm b/lib/Biodiverse/GUI/Project.pm
index 5953a717e..fd3e8a9e0 100644
--- a/lib/Biodiverse/GUI/Project.pm
+++ b/lib/Biodiverse/GUI/Project.pm
@@ -1294,6 +1294,7 @@ sub manage_empty_basedatas {
           menu_rename_basedata_labels
           menu_rename_basedata_groups
           menu_attach_basedata_properties
+          menu_attach_basedata_group_properties_from_rasters
           menu_delete_element_properties
           menu_basedata_reorder_axes
           menu_basedata_drop_axes