diff --git a/Notebooks/Node Treshold.ipynb b/Notebooks/Node Treshold.ipynb
new file mode 100644
index 0000000..dab7969
--- /dev/null
+++ b/Notebooks/Node Treshold.ipynb	
@@ -0,0 +1,169 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Node Treshold Design\n",
+    "\n",
+    "We want to apply the treshold filter on the whole stack of rasters, but filter each raster independently."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import sys\n",
+    "from pathlib import Path\n",
+    "import numpy as np\n",
+    "import matplotlib.pyplot as plt\n",
+    "import collections\n",
+    "\n",
+    "ld2dap_path = Path('../')\n",
+    "sys.path.append(str(ld2dap_path.resolve()))\n",
+    "import ld2dap\n",
+    "from ld2dap.core import Filter"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Load and display 2 rasters with different order of magnitude"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "rasters = ['../Data/phase1_rasters/Intensity_C1/UH17_GI1F051_TR.tif',\n",
+    "           '../Data/phase1_rasters/DEM_C123_3msr/UH17_GEG051_TR.tif']\n",
+    "\n",
+    "in_test = ld2dap.LoadTIFF(rasters)\n",
+    "disp_test = ld2dap.ShowFig(stack_id='all')\n",
+    "\n",
+    "disp_test.input = in_test\n",
+    "disp_test.run()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "tresh_test = ld2dap.Treshold(treshold=1e4)\n",
+    "tresh2_test = ld2dap.Treshold(treshold=1e3)\n",
+    "\n",
+    "o = ld2dap.RawOutput()\n",
+    "\n",
+    "in_test = ld2dap.LoadTIFF(rasters)\n",
+    "tresh_test.input = in_test\n",
+    "tresh2_test.input = tresh_test\n",
+    "disp_test.input = in_test\n",
+    "o.input = in_test\n",
+    "\n",
+    "\n",
+    "disp_test.run()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "A = list()\n",
+    "A.copy()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "print(o.metadata[0])"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "[x.copy() for x in o.metadata]"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "mdesc = o.metadata[0].desc\n",
+    "mdesc_copy = o.metadata[0].desc.copy()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "o.metadata[0].desc.app"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "hex(id(mdesc)), hex(id(o.metadata[0].desc)), hex(id(mdesc_copy))"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "mdesc_copy.append('BDQ')"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "mdesc_copy"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}
diff --git a/ld2dap/core/Input.py b/ld2dap/core/Input.py
index 5245b70..77dec73 100644
--- a/ld2dap/core/Input.py
+++ b/ld2dap/core/Input.py
@@ -22,7 +22,7 @@ class Input(Node):
         """Override abstract method"""
         data, meta = self._process(data, metadata)
         for output in self.outputs:
-            output.process(data, meta)
+            output.process(data, [x.copy() for x in meta])
 
     def _run(self):
         self.process(None, None)
diff --git a/ld2dap/core/Stack.py b/ld2dap/core/Stack.py
index 8033bf7..d9c83ba 100644
--- a/ld2dap/core/Stack.py
+++ b/ld2dap/core/Stack.py
@@ -8,9 +8,11 @@
 #
 # TODO details
 
+import logging
 
 class Stack(object):
     def __init__(self, begin=0, size=1, desc=None, symb=None) :
+        self.logger = logging.getLogger('Stack')
         self.begin = begin
         self.end   = begin + size
         self.desc  = list()
@@ -22,6 +24,16 @@ class Stack(object):
         for i in range(size):
             self.symb.append(symb.copy() if isinstance(symb, list) else [symb])
 
+    def copy(self):
+        self.logger.debug('Copy method called')
+        new_stack = Stack()
+        new_stack.__dict__ = self.__dict__.copy()
+        new_stack.desc = self.desc.copy()
+        new_stack.symb = self.symb.copy()
+        self.logger.debug('Old Meta: {}, New Meta: {}'.format(
+            hex(id(self.desc)), hex(id(new_stack.symb))))
+        return new_stack
+
     def __str__(self):
         return ("Stack: begin: {}, end: {}, desc: {}, symb: {}".format(
             self.begin, self.end, self.desc, self.symb))
diff --git a/logging.yaml b/logging.yaml
index b18e6ed..cf50544 100644
--- a/logging.yaml
+++ b/logging.yaml
@@ -7,7 +7,7 @@ formatters:
 handlers:
     console:
         class: logging.StreamHandler
-        level: INFO
+        level: DEBUG
         formatter: simple
         stream: ext://sys.stdout