diff --git a/gdal/warp.py b/gdal/warp.py
index 5dac040..b4f1eee 100644
--- a/gdal/warp.py
+++ b/gdal/warp.py
@@ -23,14 +23,16 @@
 # This will get replaced with a git SHA1 when you do a git archive
 __revision__ = '$Format:%H$'
 
+import os
+from qgis.core import *
 from PyQt4 import QtGui
 from sextante.core.GeoAlgorithm import GeoAlgorithm
 from sextante.parameters.ParameterRaster import ParameterRaster
 from sextante.outputs.OutputRaster import OutputRaster
-import os
-from qgis.core import *
 from sextante.parameters.ParameterSelection import ParameterSelection
 from sextante.parameters.ParameterCrs import ParameterCrs
+from sextante.parameters.ParameterString import ParameterString
+from sextante.parameters.ParameterNumber import ParameterNumber
 from sextante.gdal.GdalUtils import GdalUtils
 
 class warp(GeoAlgorithm):
@@ -41,6 +43,8 @@
     DEST_SRS = "DEST_SRS "
     METHOD = "METHOD"
     METHOD_OPTIONS = ["near", "bilinear", "cubic", "cubicspline", "lanczos"]
+    EXTRA = "EXTRA"
+    TR = "TR"
 
     def getIcon(self):
         filepath = os.path.dirname(__file__) + "/icons/warp.png"
@@ -52,7 +56,9 @@
         self.addParameter(ParameterRaster(warp.INPUT, "Input layer", False))
         self.addParameter(ParameterCrs(warp.SOURCE_SRS, "Source SRS (EPSG Code)", "4326"))
         self.addParameter(ParameterCrs(warp.DEST_SRS, "Destination SRS (EPSG Code)", "4326"))
+        self.addParameter(ParameterNumber(warp.TR, "Output file resolution in target georeferenced units (leave 0 for no change)", 0.0, None, 0.0))
         self.addParameter(ParameterSelection(warp.METHOD, "Resampling method", warp.METHOD_OPTIONS))
+        self.addParameter(ParameterString(warp.EXTRA, "Additional creation parameters"))
         self.addOutput(OutputRaster(warp.OUTPUT, "Output layer"))
 
     def processAlgorithm(self, progress):
@@ -68,6 +74,10 @@
         commands.append("-of")
         out = self.getOutputValue(warp.OUTPUT)
         commands.append(GdalUtils.getFormatShortNameFromFilename(out))
+        if str(self.getParameterValue(warp.TR)) != "0":
+            trStr = "-tr "+str(self.getParameterValue(warp.TR))+" "+str(self.getParameterValue(warp.TR))
+            commands.append(trStr)
+        commands.append(str(self.getParameterValue(warp.EXTRA)))
         commands.append(self.getParameterValue(warp.INPUT))
         commands.append(out)