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81 lines
3.1 KiB
Python
81 lines
3.1 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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contour.py
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---------------------
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Date : September 2013
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Copyright : (C) 2013 by Alexander Bruy
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Email : alexander bruy at gmail dot com
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***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************
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"""
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__author__ = 'Alexander Bruy'
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__date__ = 'September 2013'
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__copyright__ = '(C) 2013, Alexander Bruy'
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# This will get replaced with a git SHA1 when you do a git archive
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__revision__ = '$Format:%H$'
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import os
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from PyQt4 import QtGui
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from qgis.core import *
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from processing.core.GeoAlgorithm import GeoAlgorithm
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from processing.parameters.ParameterRaster import ParameterRaster
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from processing.parameters.ParameterNumber import ParameterNumber
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from processing.parameters.ParameterString import ParameterString
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from processing.outputs.OutputVector import OutputVector
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from processing.gdal.GdalUtils import GdalUtils
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class contour(GeoAlgorithm):
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INPUT_RASTER = "INPUT_RASTER"
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OUTPUT_VECTOR = "OUTPUT_VECTOR"
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INTERVAL = "INTERVAL"
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FIELD_NAME = "FIELD_NAME"
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EXTRA = "EXTRA"
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def getIcon(self):
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filepath = os.path.dirname(__file__) + "/icons/contour.png"
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return QtGui.QIcon(filepath)
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def defineCharacteristics(self):
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self.name = "Contour"
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self.group = "[GDAL] Extraction"
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self.addParameter(ParameterRaster(self.INPUT_RASTER, "Input layer", False))
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self.addParameter(ParameterNumber(self.INTERVAL, "Interval between contour lines", 0.0, 99999999.999999, 10.0))
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self.addParameter(ParameterString(self.FIELD_NAME, "Attribute name (if not provided, no elecation attribute is attached)", "ELEV", optional=True))
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self.addParameter(ParameterString(self.EXTRA, "Additional creation parameters", ""))
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self.addOutput(OutputVector(self.OUTPUT_VECTOR, "Output file for contour lines (vector)"))
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def processAlgorithm(self, progress):
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interval = str(self.getParameterValue(self.INTERVAL))
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fieldName = str(self.getParameterValue(self.FIELD_NAME))
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extra = str(self.getParameterValue(self.EXTRA))
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arguments = []
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if len(fieldName) > 0:
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arguments.append("-a")
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arguments.append(fieldName)
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arguments.append("-i")
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arguments.append(interval)
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if len(extra) > 0:
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arguments.append(extra)
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arguments.append(self.getParameterValue(self.INPUT_RASTER))
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arguments.append(self.getOutputValue(self.OUTPUT_VECTOR))
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GdalUtils.runGdal(["gdal_contour", GdalUtils.escapeAndJoin(arguments)], progress)
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