/
polygonize.py
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/
polygonize.py
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# -*- coding: utf-8 -*-
"""
***************************************************************************
polygonize.py
---------------------
Date : August 2012
Copyright : (C) 2012 by Victor Olaya
Email : volayaf 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__ = 'Victor Olaya'
__date__ = 'August 2012'
__copyright__ = '(C) 2012, Victor Olaya'
# This will get replaced with a git SHA1 when you do a git archive
__revision__ = '$Format:%H$'
import os
from qgis.PyQt.QtGui import QIcon
from qgis.PyQt.QtCore import QFileInfo
from qgis.core import (QgsProcessing,
QgsProcessingException,
QgsProcessingParameterRasterLayer,
QgsProcessingParameterBand,
QgsProcessingParameterString,
QgsProcessingParameterBoolean,
QgsProcessingParameterVectorDestination)
from processing.algs.gdal.GdalAlgorithm import GdalAlgorithm
from processing.tools.system import isWindows
from processing.algs.gdal.GdalUtils import GdalUtils
pluginPath = os.path.split(os.path.split(os.path.dirname(__file__))[0])[0]
class polygonize(GdalAlgorithm):
INPUT = 'INPUT'
BAND = 'BAND'
FIELD = 'FIELD'
EIGHT_CONNECTEDNESS = 'EIGHT_CONNECTEDNESS'
OUTPUT = 'OUTPUT'
def __init__(self):
super().__init__()
def initAlgorithm(self, config=None):
self.addParameter(QgsProcessingParameterRasterLayer(self.INPUT, self.tr('Input layer')))
self.addParameter(QgsProcessingParameterBand(self.BAND,
self.tr('Band number'),
1,
parentLayerParameterName=self.INPUT))
self.addParameter(QgsProcessingParameterString(self.FIELD,
self.tr('Name of the field to create'),
defaultValue='DN'))
self.addParameter(QgsProcessingParameterBoolean(self.EIGHT_CONNECTEDNESS,
self.tr('Use 8-connectedness'),
defaultValue=False))
self.addParameter(QgsProcessingParameterVectorDestination(self.OUTPUT,
self.tr('Vectorized'),
QgsProcessing.TypeVectorPolygon))
def name(self):
return 'polygonize'
def displayName(self):
return self.tr('Polygonize (raster to vector)')
def group(self):
return self.tr('Raster conversion')
def groupId(self):
return 'rasterconversion'
def icon(self):
return QIcon(os.path.join(pluginPath, 'images', 'gdaltools', 'polygonize.png'))
def commandName(self):
return 'gdal_polygonize'
def getConsoleCommands(self, parameters, context, feedback, executing=True):
arguments = []
inLayer = self.parameterAsRasterLayer(parameters, self.INPUT, context)
if inLayer is None:
raise QgsProcessingException(self.invalidRasterError(parameters, self.INPUT))
arguments.append(inLayer.source())
outFile = self.parameterAsOutputLayer(parameters, self.OUTPUT, context)
output, outFormat = GdalUtils.ogrConnectionStringAndFormat(outFile, context)
arguments.append(output)
if self.parameterAsBool(parameters, self.EIGHT_CONNECTEDNESS, context):
arguments.append('-8')
arguments.append('-b')
arguments.append(str(self.parameterAsInt(parameters, self.BAND, context)))
if outFormat:
arguments.append('-f {}'.format(outFormat))
arguments.append(GdalUtils.ogrLayerName(output))
arguments.append(self.parameterAsString(parameters, self.FIELD, context))
commands = []
if isWindows():
commands = ['cmd.exe', '/C ', self.commandName() + '.bat',
GdalUtils.escapeAndJoin(arguments)]
else:
commands = [self.commandName() + '.py',
GdalUtils.escapeAndJoin(arguments)]
return commands