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refactor Geometry convert alg
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Alexander Bruy
parent
8e696b7662
commit
be07989619
@ -83,6 +83,7 @@ from mmqgisx.Gridify import Gridify
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from mmqgisx.HubDistance import HubDistance
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from mmqgisx.HubLines import HubLines
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from mmqgisx.Merge import Merge
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from mmqgisx.GeometryConvert import GeometryConvert
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from ConcaveHull import ConcaveHull
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from Polygonize import Polygonize
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@ -150,7 +151,7 @@ class QGISAlgorithmProvider(AlgorithmProvider):
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DeleteColumn(), DeleteDuplicateGeometries(),
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TextToFloat(), ExtractByAttribute(),
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SelectByAttribute(), Grid(), Gridify(), HubDistance(),
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HubLines(), Merge(),
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HubLines(), Merge(), GeometryConvert(),
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#mmqgisx_delete_duplicate_geometries_algorithm(),
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#mmqgisx_geometry_convert_algorithm(),
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#mmqgisx_grid_algorithm(),
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221
python/plugins/processing/algs/qgis/mmqgisx/GeometryConvert.py
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221
python/plugins/processing/algs/qgis/mmqgisx/GeometryConvert.py
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@ -0,0 +1,221 @@
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# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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Gridify.py
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---------------------
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Date : May 2010
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Copyright : (C) 2010 by Michael Minn
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Email : pyqgis at michaelminn 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__ = 'Michael Minn'
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__date__ = 'May 2010'
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__copyright__ = '(C) 2010, Michael Minn'
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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 PyQt4.QtCore import *
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from qgis.core import *
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from processing.core.GeoAlgorithm import GeoAlgorithm
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from processing.core.GeoAlgorithmExecutionException import \
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GeoAlgorithmExecutionException
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from processing.core.parameters import ParameterVector
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from processing.core.parameters import ParameterSelection
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from processing.core.outputs import OutputVector
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from processing.tools import dataobjects, vector
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class GeometryConvert(GeoAlgorithm):
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INPUT = 'INPUT'
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TYPE = 'TYPE'
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OUTPUT = 'OUTPUT'
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TYPES = ['Centroids',
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'Nodes',
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'Linestrings',
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'Multilinestrings',
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'Polygons'
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]
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def defineCharacteristics(self):
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self.name = 'Convert geometry type'
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self.group = 'Vector geometry tools'
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self.addParameter(ParameterVector(self.INPUT,
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'Input layer', [ParameterVector.VECTOR_TYPE_ANY]))
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self.addParameter(ParameterSelection(self.TYPE,
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'New geometry type', self.TYPES))
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self.addOutput(OutputVector(self.OUTPUT, 'Output'))
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def processAlgorithm(self, progress):
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layer = dataobjects.getObjectFromUri(
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self.getParameterValue(self.INPUT))
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index = self.getParameterValue(self.TYPE)
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splitNodes = False
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if index == 0:
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newType = QGis.WKBPoint
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elif index == 1:
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newType = QGis.WKBPoint
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splitNodes = True
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elif index == 2:
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newType = QGis.WKBLineString
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elif index == 3:
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newType = QGis.WKBMultiLineString
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elif index == 4:
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newType = QGis.WKBPolygon
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else:
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newType = QGis.WKBPoint
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writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(
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layer.pendingFields(), newType, layer.crs())
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features = vector.features(layer)
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count = len(features)
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total = 100.0 / float(count)
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for count, f in enumerate(features):
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geom = f.geometry()
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geomType = geom.wkbType()
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if geomType in [QGis.WKBPoint, QGis.WKBPoint25D]:
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if newType == QGis.WKBPoint:
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writer.addFeature(f)
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else:
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raise GeoAlgorithmExecutionException(
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'Cannot convert from %s to %s', geomType, newType)
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elif geomType in [QGis.WKBMultiPoint, QGis.WKBMultiPoint25D]:
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if newType == QGis.WKBPoint and splitNodes:
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points = geom.asMultiPoint()
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for p in points:
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feat = QgsFeature()
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feat.setAttributes(f.attributes())
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feat.setGeometry(QgsGeometry.fromPoint(p))
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writer.addFeature(feat)
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elif newType == QGis.WKBPoint:
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feat = QgsFeature()
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feat.setAttributes(f.attributes())
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feat.setGeometry(geom.centroid())
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writer.addFeature(feat)
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else:
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raise GeoAlgorithmExecutionException(
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'Cannot convert from %s to %s', geomType, newType)
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elif geomType in [QGis.WKBLineString, QGis.WKBLineString25D]:
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if newType == QGis.WKBPoint and splitNodes:
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points = geom.asPolyline()
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for p in points:
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feat = QgsFeature()
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feat.setAttributes(f.attributes())
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feat.setGeometry(QgsGeometry.fromPoint(p))
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writer.addFeature(feat)
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elif newType == QGis.WKBPoint:
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feat = QgsFeature()
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feat.setAttributes(f.attributes())
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feat.setGeometry(geom.centroid())
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writer.addFeature(feat)
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elif newType == QGis.WKBLineString:
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writer.addFeature(f)
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else:
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raise GeoAlgorithmExecutionException(
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'Cannot convert from %s to %s', geomType, newType)
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elif geomType in [QGis.WKBMultiLineString, QGis.WKBMultiLineString25D]:
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if newType == QGis.WKBPoint and splitNodes:
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lines = geom.asMultiPolyline()
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for line in lines:
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for p in line:
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feat = QgsFeature()
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feat.setAttributes(f.attributes())
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feat.setGeometry(QgsGeometry.fromPoint(p))
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writer.addFeature(feat)
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elif newType == QGis.WKBPoint:
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feat = QgsFeature()
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feat.setAttributes(f.attributes())
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feat.setGeometry(geom.centroid())
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writer.addFeature(feat)
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elif newType == QGis.WKBLineString:
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lines = geom.asMultiPolyline()
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for line in lines:
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feat = QgsFeature()
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feat.setAttributes(f.attributes())
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feat.setGeometry(QgsGeometry.fromPolyline(line))
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writer.addFeature(feat)
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elif newType == QGis.WKBMultiLineString:
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writer.addFeature(f)
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else:
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raise GeoAlgorithmExecutionException(
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'Cannot convert from %s to %s', geomType, newType)
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elif geomType in [QGis.WKBPolygon, QGis.WKBPolygon25D]:
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if newType == QGis.WKBPoint and splitNodes:
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rings = geom.asPolygon()
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for ring in rings:
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for p in ring:
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feat = QgsFeature()
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feat.setAttributes(f.attributes())
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feat.setGeometry(QgsGeometry.fromPoint(p))
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writer.addFeature(feat)
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elif newType == QGis.WKBPoint:
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feat = QgsFeature()
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feat.setAttributes(f.attributes())
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feat.setGeometry(geom.centroid())
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writer.addFeature(feat)
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elif newType == QGis.WKBMultiLineString:
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rings = geom.asPolygon()
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feat = QgsFeature()
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feat.setAttributes(f.attributes())
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feat.setGeometry(QgsGeometry.fromMultiPolyline(rings))
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writer.addFeature(feat)
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elif newtype == QGis.WKBPolygon:
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writer.addFeature(f)
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else:
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raise GeoAlgorithmExecutionException(
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'Cannot convert from %s to %s', geomType, newType)
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elif geomType in [QGis.WKBMultiPolygon, QGis.WKBMultiPolygon25D]:
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if newType == QGis.WKBPoint and splitNodes:
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polygons = geom.asMultiPolygon()
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for polygon in polygons:
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for line in polygon:
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for p in line:
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feat = QgsFeature()
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feat.setAttributes(f.attributes())
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feat.setGeometry(QgsGeometry.fromPoint(p))
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writer.addFeature(feat)
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elif newType == QGis.WKBPoint:
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feat = QgsFeature()
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feat.setAttributes(f.attributes())
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feat.setGeometry(geom.centroid())
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writer.addFeature(feat)
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elif newType == QGis.WKBLineString:
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polygons = geom.asMultiPolygon()
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for polygons in polygons:
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feat = QgsFeature()
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feat.setAttributes(f.attributes())
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feat.setGeometry(QgsGeometry.fromPolyline(polygon))
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writer.addFeature(feat)
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elif newType == QGis.WKBPolygon:
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polugons = geom.asMultiPolygon()
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for polygons in polygons:
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feat = QgsFeature()
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feat.setAttributes(f.attributes())
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feat.setGeometry(QgsGeometry.fromPolygon(polygon))
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writer.addFeature(feat)
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elif newType in [QGis.WKBMultiLineString, QGis.WKBMultiPolygon]:
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writer.addFeature(f)
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else:
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raise GeoAlgorithmExecutionException(
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'Cannot convert from %s to %s', geomType, newType)
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progress.setPercentage(int(count * total))
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del writer
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