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review Line intersections tool
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from sextante.core.GeoAlgorithm import GeoAlgorithm | ||
import os.path | ||
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from PyQt4 import QtGui | ||
from PyQt4.QtCore import * | ||
from PyQt4.QtGui import * | ||
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from qgis.core import * | ||
from sextante.parameters.ParameterVector import ParameterVector | ||
from sextante.core.QGisLayers import QGisLayers | ||
from sextante.outputs.OutputVector import OutputVector | ||
from sextante.ftools import ftools_utils | ||
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from sextante.core.GeoAlgorithm import GeoAlgorithm | ||
from sextante.core.GeoAlgorithmExecutionException import GeoAlgorithmExecutionException | ||
from sextante.core.QGisLayers import QGisLayers | ||
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from sextante.parameters.ParameterVector import ParameterVector | ||
from sextante.parameters.ParameterTableField import ParameterTableField | ||
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from sextante.outputs.OutputVector import OutputVector | ||
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from sextante.ftools import FToolsUtils as utils | ||
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class LinesIntersection(GeoAlgorithm): | ||
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INPUT1 = "INPUT1" | ||
INPUT2 = "INPUT2" | ||
INPUT_A = "INPUT_A" | ||
INPUT_B = "INPUT_B" | ||
FIELD_A = "FIELD_A" | ||
FIELD_B = "FIELD_B" | ||
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OUTPUT = "OUTPUT" | ||
FIELD1 = "FIELD1" | ||
FIELD2 = "FIELD2" | ||
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def getIcon(self): | ||
return QtGui.QIcon(os.path.dirname(__file__) + "/icons/intersections.png") | ||
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def defineCharacteristics(self): | ||
self.name = "Line intersections" | ||
self.group = "Analysis tools" | ||
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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)) | ||
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self.addOutput(OutputVector(self.OUTPUT, "Output layer")) | ||
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def processAlgorithm(self, progress): | ||
layer1 = QGisLayers.getObjectFromUri(self.getParameterValue(LinesIntersection.INPUT1)) | ||
layer2 = QGisLayers.getObjectFromUri(self.getParameterValue(LinesIntersection.INPUT2)) | ||
field1 = self.getParameterValue(LinesIntersection.FIELD1) | ||
field2 = self.getParameterValue(LinesIntersection.FIELD2) | ||
provider1 = layer1.dataProvider() | ||
provider2 = layer2.dataProvider() | ||
allAttrs = provider1.attributeIndexes() | ||
provider1.select(allAttrs) | ||
allAttrs = provider2.attributeIndexes() | ||
provider2.select(allAttrs) | ||
fieldList = ftools_utils.getFieldList(layer1) | ||
index1 = provider1.fieldNameIndex(field1) | ||
field1 = fieldList[index1] | ||
field1.setName(unicode(field1.name()) + "_1") | ||
fieldList = ftools_utils.getFieldList(layer2) | ||
index2 = provider2.fieldNameIndex(field2) | ||
field2 = fieldList[index2] | ||
field2.setName(unicode(field2.name()) + "_2") | ||
fieldList = {0:field1, 1:field2} | ||
sRs = provider1.crs() | ||
writer = self.getOutputFromName(LinesIntersection.OUTPUT).getVectorWriter(fieldList, QGis.WKBPoint, sRs) | ||
#writer = QgsVectorFileWriter(outPath, "UTF-8", fieldList, QGis.WKBPoint, sRs) | ||
inFeat = QgsFeature() | ||
settings = QSettings() | ||
encoding = settings.value( "/UI/encoding", "System" ).toString() | ||
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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) | ||
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output = self.getOutputValue(self.OUTPUT) | ||
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providerA = layerA.dataProvider() | ||
providerB = layerB.dataProvider() | ||
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idxA = layerA.fieldNameIndex(fieldA) | ||
idxB = layerB.fieldNameIndex(fieldB) | ||
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fieldList = {0 : layerA.pendingFields()[idxA], | ||
1 : layerB.pendingFields()[idxB] | ||
} | ||
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writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(fieldList, | ||
QGis.WKBPoint, providerA.crs()) | ||
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spatialIndex = utils.createSpatialIndex(providerB) | ||
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providerA.rewind() | ||
layerA.select([idxA]) | ||
providerB.rewind() | ||
layerB.select([idxB]) | ||
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inFeatA = QgsFeature() | ||
inFeatB = QgsFeature() | ||
outFeat = QgsFeature() | ||
inGeom = QgsGeometry() | ||
tempGeom = QgsGeometry() | ||
start = 15.00 | ||
add = 85.00 / layer1.featureCount() | ||
index = ftools_utils.createIndex( provider2 ) | ||
while provider1.nextFeature(inFeat): | ||
inGeom = inFeat.geometry() | ||
lineList = [] | ||
#(check, lineList) = layer2.featuresInRectangle(inGeom.boundingBox(), True, True) | ||
# Below is a work-around for featuresInRectangle | ||
# Which appears to have been removed for QGIS version 1.0 | ||
#layer2.select(inGeom.boundingBox(), False) | ||
#lineList = layer2.selectedFeatures() | ||
lineList = index.intersects( inGeom.boundingBox() ) | ||
if len(lineList) > 0: check = 0 | ||
else: check = 1 | ||
if check == 0: | ||
for i in lineList: | ||
provider2.featureAtId( int( i ), inFeatB , True, allAttrs ) | ||
tmpGeom = QgsGeometry( inFeatB.geometry() ) | ||
#tempGeom = i.geometry() | ||
tempList = [] | ||
atMap1 = inFeat.attributeMap() | ||
atMap2 = inFeatB.attributeMap() | ||
tmpGeom = QgsGeometry() | ||
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current = 0 | ||
total = 100.0 / float(providerA.featureCount()) | ||
hasIntersections = False | ||
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while layerA.nextFeature(inFeatA): | ||
inGeom = inFeatA.geometry() | ||
hasIntersections = False | ||
lines = spatialIndex.intersects(inGeom.boundingBox()) | ||
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if len(lines) > 0: | ||
hasIntersections = True | ||
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if hasIntersections: | ||
layerB.select([idxB]) | ||
for i in lines: | ||
layerB.featureAtId(int(i), inFeatB) | ||
tmpGeom = QgsGeometry(inFeatB.geometry()) | ||
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points = [] | ||
atMapA = inFeatA.attributeMap() | ||
atMapB = inFeatB.attributeMap() | ||
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if inGeom.intersects(tmpGeom): | ||
tempGeom = inGeom.intersection(tmpGeom) | ||
if tempGeom.type() == QGis.Point: | ||
if tempGeom.isMultipart(): | ||
tempList = tempGeom.asMultiPoint() | ||
points = tempGeom.asMultiPoint() | ||
else: | ||
tempList.append(tempGeom.asPoint()) | ||
for j in tempList: | ||
points.append(tempGeom.asPoint()) | ||
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for j in points: | ||
outFeat.setGeometry(tempGeom.fromPoint(j)) | ||
outFeat.addAttribute(0, atMap1[index1]) | ||
outFeat.addAttribute(1, atMap2[index2]) | ||
outFeat.addAttribute(0, atMapA[idxA]) | ||
outFeat.addAttribute(1, atMapB[idxB]) | ||
writer.addFeature(outFeat) | ||
start = start + add | ||
progress.setPercentage(start) | ||
del writer | ||
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current += 1 | ||
progress.setPercentage(int(current * total)) | ||
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def defineCharacteristics(self): | ||
self.name = "Line intersections" | ||
self.group = "Analysis tools" | ||
self.addParameter(ParameterVector(LinesIntersection.INPUT1, "Input layer", ParameterVector.VECTOR_TYPE_LINE)) | ||
self.addParameter(ParameterVector(LinesIntersection.INPUT2, "Intersect layer", ParameterVector.VECTOR_TYPE_LINE)) | ||
self.addParameter(ParameterTableField(LinesIntersection.FIELD1, "Input unique ID field", LinesIntersection.INPUT1)) | ||
self.addParameter(ParameterTableField(LinesIntersection.FIELD2, "Intersect unique ID field", LinesIntersection.INPUT2)) | ||
self.addOutput(OutputVector(LinesIntersection.OUTPUT, "Output layer")) | ||
#========================================================= | ||
del writer |