[FEATURE] reproject layer tool for SEXTANTE

Author: alexbruy

python/plugins/sextante/ftools/FToolsAlgorithmProvider.py

@@ -41,6 +41,7 @@
 from sextante.ftools.NearestNeighbourAnalysis import NearestNeighbourAnalysis
 
 # data management tools
+from sextante.ftools.ReprojectLayer import ReprojectLayer
 
 # geometry tools
 from sextante.ftools.Delaunay import Delaunay
@@ -79,6 +80,7 @@ def __init__(self):
                         BasicStatisticsNumbers(), NearestNeighbourAnalysis(),
                         MeanCoords(), LinesIntersection(), UniqueValues(), PointDistance(),
                         # data management
+                        ReprojectLayer(),
                         # geometry
                         ExportGeometryInfo(), Centroids(), Delaunay(), VoronoiPolygons(),
                         SimplifyGeometries(), DensifyGeometries(), MultipartToSingleparts(),

python/plugins/sextante/ftools/ReprojectLayer.py

@@ -0,0 +1,90 @@
+# -*- coding: utf-8 -*-
+
+"""
+***************************************************************************
+    ReprojectLayer.py
+    ---------------------
+    Date                 : October 2012
+    Copyright            : (C) 2012 by Alexander Bruy
+    Email                : alexander dot bruy at gmail dot com
+***************************************************************************
+*                                                                         *
+*   This program is free software; you can redistribute it and/or modify  *
+*   it under the terms of the GNU General Public License as published by  *
+*   the Free Software Foundation; either version 2 of the License, or     *
+*   (at your option) any later version.                                   *
+*                                                                         *
+***************************************************************************
+"""
+
+__author__ = 'Alexander Bruy'
+__date__ = 'October 2012'
+__copyright__ = '(C) 2012, Alexander Bruy'
+# This will get replaced with a git SHA1 when you do a git archive
+__revision__ = '$Format:%H$'
+
+import os.path
+
+from PyQt4 import QtGui
+from PyQt4.QtCore import *
+
+from qgis.core import *
+
+from sextante.core.GeoAlgorithm import GeoAlgorithm
+from sextante.core.QGisLayers import QGisLayers
+from sextante.core.SextanteLog import SextanteLog
+
+from sextante.parameters.ParameterVector import ParameterVector
+from sextante.parameters.ParameterCrs import ParameterCrs
+
+from sextante.outputs.OutputVector import OutputVector
+
+class ReprojectLayer(GeoAlgorithm):
+
+    INPUT = "INPUT"
+    TARGET_CRS = "TARGET_CRS"
+    OUTPUT = "OUTPUT"
+
+    def getIcon(self):
+        return QtGui.QIcon(os.path.dirname(__file__) + "/icons/reproject.png")
+
+    def defineCharacteristics(self):
+        self.name = "Reproject layer"
+        self.group = "Data management tools"
+
+        self.addParameter(ParameterVector(self.INPUT, "Input layer", ParameterVector.VECTOR_TYPE_ANY))
+        self.addParameter(ParameterCrs(self.TARGET_CRS, "Target CRS", "4326"))
+
+        self.addOutput(OutputVector(self.OUTPUT, "Reprojected layer"))
+
+    def processAlgorithm(self, progress):
+        layer = QGisLayers.getObjectFromUri(self.getParameterValue(self.INPUT))
+        crsId = self.getParameterValue(self.TARGET_CRS)
+        targetCrs = QgsCoordinateReferenceSystem(int(crsId))
+
+        output = self.getOutputValue(self.OUTPUT)
+
+        writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(layer.pendingFields(),
+                     layer.wkbType(), targetCrs)
+
+        layer.select(layer.pendingAllAttributesList())
+
+        current = 0
+        total = 100.0 / float(layer.featureCount())
+
+        layerCrs = layer.crs()
+        crsTransform = QgsCoordinateTransform(layerCrs, targetCrs)
+
+        f = QgsFeature()
+        outFeat = QgsFeature()
+        while layer.nextFeature(f):
+            geom = f.geometry()
+            geom.transform(crsTransform)
+            outFeat.setGeometry(geom)
+            outFeat.setAttributeMap(f.attributeMap())
+            writer.addFeature(outFeat)
+
+            current += 1
+            progress.setPercentage(int(current * total))
+
+        del writer