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136 lines
5.4 KiB
Python
136 lines
5.4 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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polygonize.py
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---------------------
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Date : August 2012
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Copyright : (C) 2012 by Victor Olaya
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Email : volayaf 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__ = 'Victor Olaya'
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__date__ = 'August 2012'
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__copyright__ = '(C) 2012, Victor Olaya'
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import os
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from qgis.PyQt.QtGui import QIcon
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from qgis.core import (QgsProcessing,
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QgsProcessingException,
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QgsProcessingParameterDefinition,
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QgsProcessingParameterRasterLayer,
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QgsProcessingParameterBand,
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QgsProcessingParameterString,
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QgsProcessingParameterBoolean,
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QgsProcessingParameterVectorDestination)
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from processing.algs.gdal.GdalAlgorithm import GdalAlgorithm
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from processing.tools.system import isWindows
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from processing.algs.gdal.GdalUtils import GdalUtils
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pluginPath = os.path.split(os.path.split(os.path.dirname(__file__))[0])[0]
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class polygonize(GdalAlgorithm):
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INPUT = 'INPUT'
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BAND = 'BAND'
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FIELD = 'FIELD'
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EIGHT_CONNECTEDNESS = 'EIGHT_CONNECTEDNESS'
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EXTRA = 'EXTRA'
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OUTPUT = 'OUTPUT'
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def __init__(self):
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super().__init__()
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def initAlgorithm(self, config=None):
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self.addParameter(QgsProcessingParameterRasterLayer(self.INPUT, self.tr('Input layer')))
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self.addParameter(QgsProcessingParameterBand(self.BAND,
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self.tr('Band number'),
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1,
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parentLayerParameterName=self.INPUT))
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self.addParameter(QgsProcessingParameterString(self.FIELD,
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self.tr('Name of the field to create'),
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defaultValue='DN'))
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self.addParameter(QgsProcessingParameterBoolean(self.EIGHT_CONNECTEDNESS,
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self.tr('Use 8-connectedness'),
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defaultValue=False))
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extra_param = QgsProcessingParameterString(self.EXTRA,
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self.tr('Additional command-line parameters'),
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defaultValue=None,
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optional=True)
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extra_param.setFlags(extra_param.flags() | QgsProcessingParameterDefinition.FlagAdvanced)
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self.addParameter(extra_param)
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self.addParameter(QgsProcessingParameterVectorDestination(self.OUTPUT,
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self.tr('Vectorized'),
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QgsProcessing.TypeVectorPolygon))
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def name(self):
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return 'polygonize'
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def displayName(self):
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return self.tr('Polygonize (raster to vector)')
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def group(self):
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return self.tr('Raster conversion')
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def groupId(self):
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return 'rasterconversion'
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def icon(self):
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return QIcon(os.path.join(pluginPath, 'images', 'gdaltools', 'polygonize.png'))
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def commandName(self):
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return 'gdal_polygonize'
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def getConsoleCommands(self, parameters, context, feedback, executing=True):
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arguments = []
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inLayer = self.parameterAsRasterLayer(parameters, self.INPUT, context)
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if inLayer is None:
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raise QgsProcessingException(self.invalidRasterError(parameters, self.INPUT))
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arguments.append(inLayer.source())
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outFile = self.parameterAsOutputLayer(parameters, self.OUTPUT, context)
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self.setOutputValue(self.OUTPUT, outFile)
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output, outFormat = GdalUtils.ogrConnectionStringAndFormat(outFile, context)
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arguments.append(output)
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if self.parameterAsBoolean(parameters, self.EIGHT_CONNECTEDNESS, context):
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arguments.append('-8')
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arguments.append('-b')
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arguments.append(str(self.parameterAsInt(parameters, self.BAND, context)))
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if outFormat:
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arguments.append('-f {}'.format(outFormat))
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if self.EXTRA in parameters and parameters[self.EXTRA] not in (None, ''):
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extra = self.parameterAsString(parameters, self.EXTRA, context)
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arguments.append(extra)
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layerName = GdalUtils.ogrOutputLayerName(output)
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if layerName:
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arguments.append(layerName)
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arguments.append(self.parameterAsString(parameters, self.FIELD, context))
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if isWindows():
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commands = ["python3", "-m", self.commandName()]
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else:
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commands = [self.commandName() + '.py']
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commands.append(GdalUtils.escapeAndJoin(arguments))
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return commands
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