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96 lines
3.5 KiB
Python
96 lines
3.5 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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DeleteHoles.py
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---------------------
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Date : April 2015
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Copyright : (C) 2015 by Etienne Trimaille
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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__ = 'Etienne Trimaille'
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__date__ = 'April 2015'
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__copyright__ = '(C) 2015, Etienne Trimaille'
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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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from qgis.core import (QgsApplication,
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QgsProcessingUtils)
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from processing.algs.qgis.QgisAlgorithm import QgisAlgorithm
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from processing.core.parameters import (ParameterVector,
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ParameterNumber)
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from processing.core.outputs import OutputVector
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from processing.tools import dataobjects
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class DeleteHoles(QgisAlgorithm):
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INPUT = 'INPUT'
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MIN_AREA = 'MIN_AREA'
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OUTPUT = 'OUTPUT'
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def icon(self):
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return QgsApplication.getThemeIcon("/providerQgis.svg")
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def svgIconPath(self):
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return QgsApplication.iconPath("providerQgis.svg")
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def tags(self):
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return self.tr('remove,delete,drop,holes,rings,fill').split(',')
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def group(self):
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return self.tr('Vector geometry tools')
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def __init__(self):
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super().__init__()
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self.addParameter(ParameterVector(self.INPUT,
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self.tr('Input layer'), [dataobjects.TYPE_VECTOR_POLYGON]))
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self.addParameter(ParameterNumber(self.MIN_AREA,
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self.tr('Remove holes with area less than'), 0, 10000000.0, default=0.0, optional=True))
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self.addOutput(OutputVector(self.OUTPUT, self.tr('Cleaned'), datatype=[dataobjects.TYPE_VECTOR_POLYGON]))
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def name(self):
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return 'deleteholes'
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def displayName(self):
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return self.tr('Delete holes')
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def processAlgorithm(self, parameters, context, feedback):
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layer = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.INPUT), context)
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min_area = self.getParameterValue(self.MIN_AREA)
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if min_area is not None:
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try:
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min_area = float(min_area)
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except:
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pass
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if min_area == 0.0:
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min_area = -1.0
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writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(layer.fields(), layer.wkbType(), layer.crs(),
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context)
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features = QgsProcessingUtils.getFeatures(layer, context)
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total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
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for current, f in enumerate(features):
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if f.hasGeometry():
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if min_area is not None:
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f.setGeometry(f.geometry().removeInteriorRings(min_area))
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else:
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f.setGeometry(f.geometry().removeInteriorRings())
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writer.addFeature(f)
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feedback.setProgress(int(current * total))
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del writer
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