49 lines
2.0 KiB
Python

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
class warp(GeoAlgorithm):
INPUT = "INPUT"
OUTPUT = "OUTPUT"
SOURCE_SRS = "SOURCE_SRS"
DEST_SRS = "DEST_SRS "
METHOD = "METHOD"
METHOD_OPTIONS = ["near", "bilinear", "cubic", "cubicspline", "lanczos"]
def getIcon(self):
filepath = os.path.dirname(__file__) + "/icons/warp.png"
return QtGui.QIcon(filepath)
def defineCharacteristics(self):
self.name = "warp"
self.group = "Projections"
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(ParameterSelection(warp.METHOD, "Resampling method", warp.METHOD_OPTIONS))
self.addOutput(OutputRaster(warp.OUTPUT, "Output layer"))
def processAlgorithm(self, progress):
srs = self.getParameterValue(warp.DEST_SRS)
self.crs = QgsCoordinateReferenceSystem(int(srs))
commands = ["gdalwarp"]
commands.append("-s_srs")
commands.append("EPSG:" + str(self.getParameterValue(warp.SOURCE_SRS)))
commands.append("-t_srs")
commands.append("EPSG:" + str(srs))
commands.append("-r")
commands.append(warp.METHOD_OPTIONS[self.getParameterValue(warp.METHOD)])
commands.append("-of")
out = self.getOutputValue(warp.OUTPUT)
commands.append(GdalUtils.getFormatShortNameFromFilename(out))
commands.append(self.getParameterValue(warp.INPUT))
commands.append(out)
GdalUtils.runGdal(commands, progress)