mirror of
https://github.com/qgis/QGIS.git
synced 2025-03-03 00:02:25 -05:00
121 lines
5.2 KiB
Python
121 lines
5.2 KiB
Python
|
# -*- coding: utf-8 -*-
|
||
|
|
|
||
|
|
"""
|
||
|
|
***************************************************************************
|
||
|
|
ShortestPath.py
|
||
|
|
---------------------
|
||
|
|
Date : November 2016
|
||
|
|
Copyright : (C) 2016 by Alexander Bruy
|
||
|
|
Email : alexander dot bruy 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__ = 'Alexander Bruy'
|
||
|
|
__date__ = 'November 2016'
|
||
|
|
__copyright__ = '(C) 2016, Alexander Bruy'
|
||
|
|
|
||
|
|
# 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.analysis import (QgsLineVectorLayerDirector,
|
||
|
|
QgsDistanceArcProperter,
|
||
|
|
QgsGraphBuilder,
|
||
|
|
QgsGraphAnalyzer
|
||
|
|
)
|
||
|
|
|
||
|
|
from processing.core.GeoAlgorithm import GeoAlgorithm
|
||
|
|
from processing.core.parameters import (ParameterVector,
|
||
|
|
ParameterPoint,
|
||
|
|
ParameterNumber,
|
||
|
|
ParameterString,
|
||
|
|
ParameterTableField,
|
||
|
|
ParameterSelection
|
||
|
|
)
|
||
|
|
from processing.core.outputs import (OutputNumber,
|
||
|
|
OutputVector
|
||
|
|
)
|
||
|
|
from processing.tools import dataobjects
|
||
|
|
|
||
|
|
pluginPath = os.path.split(os.path.split(os.path.dirname(__file__))[0])[0]
|
||
|
|
|
||
|
|
|
||
|
|
class ShortestPath(GeoAlgorithm):
|
||
|
|
|
||
|
|
INPUT_VECTOR = 'INPUT_VECTOR'
|
||
|
|
START_POINT = 'START_POINT'
|
||
|
|
END_POINT = 'END_POINT'
|
||
|
|
DIRECTION_FIELD = 'DIRECTION_FIELD'
|
||
|
|
VALUE_DIRECT = 'VALUE_DIRECT'
|
||
|
|
VALUE_REVERSED = 'VALUE_REVERSED'
|
||
|
|
VALUE_BIDIRECTIONAL = 'VALUE_BIDIRECTIONAL'
|
||
|
|
DEFAULT_DIRECTION = 'DEFAULT_DIRECTION'
|
||
|
|
PATH_LENGTH = 'PATH_LENGTH'
|
||
|
|
OUTPUT_LAYER = 'OUTPUT_LAYER'
|
||
|
|
|
||
|
|
def getIcon(self):
|
||
|
|
return QIcon(os.path.join(pluginPath, 'images', 'networkanalysis.png'))
|
||
|
|
|
||
|
|
def defineCharacteristics(self):
|
||
|
|
self.DIRECTIONS = {1: self.tr('Direct direction'),
|
||
|
|
2: self.tr('Inverse direction'),
|
||
|
|
3: self.tr('Bidirectional')
|
||
|
|
}
|
||
|
|
|
||
|
|
self.UNITS = {0: self.tr('Meters'),
|
||
|
|
1: self.tr('Kilometers')
|
||
|
|
}
|
||
|
|
|
||
|
|
self.name, self.i18n_name = self.trAlgorithm('Shortest path')
|
||
|
|
self.group, self.i18n_group = self.trAlgorithm('Network analysis')
|
||
|
|
|
||
|
|
self.addParameter(ParameterVector(self.INPUT_VECTOR,
|
||
|
|
self.tr('Vector layer representing road network'),
|
||
|
|
[dataobjects.TYPE_VECTOR_LINE]))
|
||
|
|
self.addParameter(ParameterPoint(self.START_POINT,
|
||
|
|
self.tr('Start point')))
|
||
|
|
self.addParameter(ParameterPoint(self.END_POINT,
|
||
|
|
self.tr('End point')))
|
||
|
|
|
||
|
|
self.addParameter(ParameterTableField(self.DIRECTION_FIELD,
|
||
|
|
self.tr('Road direction field'),
|
||
|
|
self.INPUT_VECTOR))
|
||
|
|
self.addParameter(ParameterString(self.VALUE_DIRECT,
|
||
|
|
self.tr('Value for direct direction road'),
|
||
|
|
''))
|
||
|
|
self.addParameter(ParameterString(self.VALUE_REVERSED,
|
||
|
|
self.tr('Value for reversed direction road'),
|
||
|
|
''))
|
||
|
|
self.addParameter(ParameterString(self.VALUE_BIDIRECTIONAL,
|
||
|
|
self.tr('Value for bidirectional road'),
|
||
|
|
''))
|
||
|
|
self.addParameter(ParameterSelection(self.DEFAULT_DIRECTION,
|
||
|
|
self.tr('Default road direction'),
|
||
|
|
list(self.DIRECTIONS.keys())))
|
||
|
|
|
||
|
|
self.addOutput(OutputNumber(self.PATH_LENGTH,
|
||
|
|
self.tr('Path length')))
|
||
|
|
self.addOutput(OutputVector(self.OUTPUT_LAYER,
|
||
|
|
self.tr('Shortest path'),
|
||
|
|
datatype=[dataobjects.TYPE_VECTOR_LINE]))
|
||
|
|
|
||
|
|
def processAlgorithm(self, progress):
|
||
|
|
layer = dataobjects.getObjectFromUri(
|
||
|
|
self.getParameterValue(self.INPUT_VECTOR))
|
||
|
|
fielName = self.getParameterValue(self.RASTER_BAND)
|
||
|
|
columnPrefix = self.getParameterValue(self.COLUMN_PREFIX)
|
||
|
|
st = self.getParameterValue(self.STATISTICS)
|
||
|
|
|
||
|
|
vectorLayer = dataobjects.getObjectFromUri(vectorPath)
|