mirror of
https://github.com/qgis/QGIS.git
synced 2025-03-04 00:30:59 -05:00
139 lines
6.0 KiB
Python
139 lines
6.0 KiB
Python
# -*- coding: utf-8 -*-
|
|
|
|
"""
|
|
***************************************************************************
|
|
Intersection.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.core import (QgsFeatureRequest,
|
|
QgsFeature,
|
|
QgsFeatureSink,
|
|
QgsGeometry,
|
|
QgsWkbTypes,
|
|
QgsMessageLog,
|
|
QgsProcessingUtils)
|
|
|
|
from processing.core.GeoAlgorithmExecutionException import GeoAlgorithmExecutionException
|
|
from processing.algs.qgis.QgisAlgorithm import QgisAlgorithm
|
|
from processing.core.parameters import ParameterVector
|
|
from processing.core.outputs import OutputVector
|
|
from processing.tools import vector
|
|
|
|
pluginPath = os.path.split(os.path.split(os.path.dirname(__file__))[0])[0]
|
|
|
|
wkbTypeGroups = {
|
|
'Point': (QgsWkbTypes.Point, QgsWkbTypes.MultiPoint, QgsWkbTypes.Point25D, QgsWkbTypes.MultiPoint25D,),
|
|
'LineString': (QgsWkbTypes.LineString, QgsWkbTypes.MultiLineString, QgsWkbTypes.LineString25D, QgsWkbTypes.MultiLineString25D,),
|
|
'Polygon': (QgsWkbTypes.Polygon, QgsWkbTypes.MultiPolygon, QgsWkbTypes.Polygon25D, QgsWkbTypes.MultiPolygon25D,),
|
|
}
|
|
for key, value in list(wkbTypeGroups.items()):
|
|
for const in value:
|
|
wkbTypeGroups[const] = key
|
|
|
|
|
|
class Intersection(QgisAlgorithm):
|
|
|
|
INPUT = 'INPUT'
|
|
INPUT2 = 'INPUT2'
|
|
OUTPUT = 'OUTPUT'
|
|
|
|
def icon(self):
|
|
return QIcon(os.path.join(pluginPath, 'images', 'ftools', 'intersect.png'))
|
|
|
|
def group(self):
|
|
return self.tr('Vector overlay tools')
|
|
|
|
def __init__(self):
|
|
super().__init__()
|
|
self.addParameter(ParameterVector(self.INPUT,
|
|
self.tr('Input layer')))
|
|
self.addParameter(ParameterVector(self.INPUT2,
|
|
self.tr('Intersect layer')))
|
|
self.addOutput(OutputVector(self.OUTPUT, self.tr('Intersection')))
|
|
|
|
def name(self):
|
|
return 'intersection'
|
|
|
|
def displayName(self):
|
|
return self.tr('Intersection')
|
|
|
|
def processAlgorithm(self, parameters, context, feedback):
|
|
vlayerA = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.INPUT), context)
|
|
vlayerB = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.INPUT2), context)
|
|
|
|
geomType = QgsWkbTypes.multiType(vlayerA.wkbType())
|
|
fields = vector.combineVectorFields(vlayerA, vlayerB)
|
|
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(fields, geomType, vlayerA.crs(), context)
|
|
outFeat = QgsFeature()
|
|
index = QgsProcessingUtils.createSpatialIndex(vlayerB, context)
|
|
selectionA = QgsProcessingUtils.getFeatures(vlayerA, context)
|
|
total = 100.0 / vlayerA.featureCount() if vlayerA.featureCount() else 0
|
|
for current, inFeatA in enumerate(selectionA):
|
|
feedback.setProgress(int(current * total))
|
|
geom = inFeatA.geometry()
|
|
atMapA = inFeatA.attributes()
|
|
intersects = index.intersects(geom.boundingBox())
|
|
request = QgsFeatureRequest().setFilterFids(intersects)
|
|
|
|
engine = None
|
|
if len(intersects) > 0:
|
|
# use prepared geometries for faster intersection tests
|
|
engine = QgsGeometry.createGeometryEngine(geom.geometry())
|
|
engine.prepareGeometry()
|
|
|
|
for inFeatB in vlayerB.getFeatures(request):
|
|
tmpGeom = inFeatB.geometry()
|
|
if engine.intersects(tmpGeom.geometry()):
|
|
atMapB = inFeatB.attributes()
|
|
int_geom = QgsGeometry(geom.intersection(tmpGeom))
|
|
if int_geom.wkbType() == QgsWkbTypes.Unknown or QgsWkbTypes.flatType(int_geom.geometry().wkbType()) == QgsWkbTypes.GeometryCollection:
|
|
int_com = geom.combine(tmpGeom)
|
|
int_geom = QgsGeometry()
|
|
if int_com:
|
|
int_sym = geom.symDifference(tmpGeom)
|
|
int_geom = QgsGeometry(int_com.difference(int_sym))
|
|
if int_geom.isEmpty() or not int_geom.isGeosValid():
|
|
raise GeoAlgorithmExecutionException(
|
|
self.tr('GEOS geoprocessing error: One or '
|
|
'more input features have invalid '
|
|
'geometry.'))
|
|
try:
|
|
if int_geom.wkbType() in wkbTypeGroups[wkbTypeGroups[int_geom.wkbType()]]:
|
|
outFeat.setGeometry(int_geom)
|
|
attrs = []
|
|
attrs.extend(atMapA)
|
|
attrs.extend(atMapB)
|
|
outFeat.setAttributes(attrs)
|
|
writer.addFeature(outFeat, QgsFeatureSink.FastInsert)
|
|
except:
|
|
raise GeoAlgorithmExecutionException(
|
|
self.tr('Feature geometry error: One or more '
|
|
'output features ignored due to invalid '
|
|
'geometry.'))
|
|
|
|
del writer
|