mirror of
https://github.com/qgis/QGIS.git
synced 2025-02-28 00:17:30 -05:00
142 lines
5.1 KiB
Python
142 lines
5.1 KiB
Python
# -*- coding: utf-8 -*-
|
|
|
|
"""
|
|
***************************************************************************
|
|
LinesIntersection.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.path
|
|
|
|
from PyQt4 import QtGui
|
|
from PyQt4.QtCore import *
|
|
|
|
from qgis.core import *
|
|
|
|
from sextante.core.GeoAlgorithm import GeoAlgorithm
|
|
from sextante.core.GeoAlgorithmExecutionException import GeoAlgorithmExecutionException
|
|
from sextante.core.QGisLayers import QGisLayers
|
|
|
|
from sextante.parameters.ParameterVector import ParameterVector
|
|
from sextante.parameters.ParameterTableField import ParameterTableField
|
|
|
|
from sextante.outputs.OutputVector import OutputVector
|
|
|
|
from sextante.ftools import FToolsUtils as utils
|
|
|
|
class LinesIntersection(GeoAlgorithm):
|
|
|
|
INPUT_A = "INPUT_A"
|
|
INPUT_B = "INPUT_B"
|
|
FIELD_A = "FIELD_A"
|
|
FIELD_B = "FIELD_B"
|
|
|
|
OUTPUT = "OUTPUT"
|
|
|
|
def getIcon(self):
|
|
return QtGui.QIcon(os.path.dirname(__file__) + "/icons/intersections.png")
|
|
|
|
def defineCharacteristics(self):
|
|
self.name = "Line intersections"
|
|
self.group = "Analysis tools"
|
|
|
|
self.addParameter(ParameterVector(self.INPUT_A, "Input layer", ParameterVector.VECTOR_TYPE_LINE))
|
|
self.addParameter(ParameterVector(self.INPUT_B, "Intersect layer", ParameterVector.VECTOR_TYPE_LINE))
|
|
self.addParameter(ParameterTableField(self.FIELD_A, "Input unique ID field", self.INPUT_A))
|
|
self.addParameter(ParameterTableField(self.FIELD_B, "Intersect unique ID field", self.INPUT_B))
|
|
|
|
self.addOutput(OutputVector(self.OUTPUT, "Output layer"))
|
|
|
|
def processAlgorithm(self, progress):
|
|
layerA = QGisLayers.getObjectFromUri(self.getParameterValue(self.INPUT_A))
|
|
layerB = QGisLayers.getObjectFromUri(self.getParameterValue(self.INPUT_B))
|
|
fieldA = self.getParameterValue(self.FIELD_A)
|
|
fieldB = self.getParameterValue(self.FIELD_B)
|
|
|
|
output = self.getOutputValue(self.OUTPUT)
|
|
|
|
providerA = layerA.dataProvider()
|
|
providerB = layerB.dataProvider()
|
|
|
|
|
|
idxA = layerA.fieldNameIndex(fieldA)
|
|
idxB = layerB.fieldNameIndex(fieldB)
|
|
|
|
fieldList = {0 : layerA.pendingFields()[idxA],
|
|
1 : layerB.pendingFields()[idxB]
|
|
}
|
|
|
|
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(fieldList,
|
|
QGis.WKBPoint, providerA.crs())
|
|
|
|
spatialIndex = utils.createSpatialIndex(providerB)
|
|
|
|
providerA.rewind()
|
|
layerA.select([idxA])
|
|
providerB.rewind()
|
|
layerB.select([idxB])
|
|
|
|
inFeatA = QgsFeature()
|
|
inFeatB = QgsFeature()
|
|
outFeat = QgsFeature()
|
|
inGeom = QgsGeometry()
|
|
tmpGeom = QgsGeometry()
|
|
|
|
current = 0
|
|
total = 100.0 / float(providerA.featureCount())
|
|
hasIntersections = False
|
|
|
|
while layerA.nextFeature(inFeatA):
|
|
inGeom = inFeatA.geometry()
|
|
hasIntersections = False
|
|
lines = spatialIndex.intersects(inGeom.boundingBox())
|
|
|
|
if len(lines) > 0:
|
|
hasIntersections = True
|
|
|
|
if hasIntersections:
|
|
layerB.select([idxB])
|
|
for i in lines:
|
|
layerB.featureAtId(int(i), inFeatB)
|
|
tmpGeom = QgsGeometry(inFeatB.geometry())
|
|
|
|
points = []
|
|
atMapA = inFeatA.attributeMap()
|
|
atMapB = inFeatB.attributeMap()
|
|
|
|
if inGeom.intersects(tmpGeom):
|
|
tempGeom = inGeom.intersection(tmpGeom)
|
|
if tempGeom.type() == QGis.Point:
|
|
if tempGeom.isMultipart():
|
|
points = tempGeom.asMultiPoint()
|
|
else:
|
|
points.append(tempGeom.asPoint())
|
|
|
|
for j in points:
|
|
outFeat.setGeometry(tempGeom.fromPoint(j))
|
|
outFeat.addAttribute(0, atMapA[idxA])
|
|
outFeat.addAttribute(1, atMapB[idxB])
|
|
writer.addFeature(outFeat)
|
|
|
|
current += 1
|
|
progress.setPercentage(int(current * total))
|
|
|
|
del writer
|