mirror of
https://github.com/qgis/QGIS.git
synced 2025-03-06 00:05:02 -05:00
2d0e950ba2
Work done for Faunalia funded by Prof. António Mira (University of Évora, Portugal, Unidade de Biologia da Conservação) and Dr. Rosana Peixoto
122 lines
4.6 KiB
Python
122 lines
4.6 KiB
Python
# -*- coding: utf-8 -*-
|
|
|
|
"""
|
|
***************************************************************************
|
|
PointsToPaths.py
|
|
---------------------
|
|
Date : April 2014
|
|
Copyright : (C) 2014 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__ = 'April 2014'
|
|
__copyright__ = '(C) 2014, Alexander Bruy'
|
|
|
|
# This will get replaced with a git SHA1 when you do a git archive
|
|
|
|
__revision__ = '$Format:%H$'
|
|
|
|
from datetime import datetime
|
|
from datetime import timedelta
|
|
|
|
from PyQt4.QtCore import *
|
|
|
|
from qgis.core import *
|
|
|
|
from processing import interface
|
|
from processing.core.GeoAlgorithm import GeoAlgorithm
|
|
from processing.core.ProcessingLog import ProcessingLog
|
|
from processing.parameters.ParameterVector import ParameterVector
|
|
from processing.parameters.ParameterTableField import ParameterTableField
|
|
from processing.parameters.ParameterString import ParameterString
|
|
from processing.parameters.ParameterNumber import ParameterNumber
|
|
from processing.outputs.OutputVector import OutputVector
|
|
from processing.tools import dataobjects, vector
|
|
|
|
class PointsToPaths(GeoAlgorithm):
|
|
|
|
VECTOR = 'VECTOR'
|
|
GROUP_FIELD = 'GROUP_FIELD'
|
|
ORDER_FIELD = 'ORDER_FIELD'
|
|
DATE_FORMAT = 'DATE_FORMAT'
|
|
GAP_PERIOD = 'GAP_PERIOD'
|
|
OUTPUT = 'OUTPUT'
|
|
|
|
def defineCharacteristics(self):
|
|
self.name = 'Points to path'
|
|
self.group = 'Vector creation tools'
|
|
self.addParameter(ParameterVector(self.VECTOR,
|
|
'Input point layer', [ParameterVector.VECTOR_TYPE_POINT]))
|
|
self.addParameter(
|
|
ParameterTableField(self.GROUP_FIELD, 'Group field', self.VECTOR))
|
|
self.addParameter(
|
|
ParameterTableField(self.ORDER_FIELD, 'Order field', self.VECTOR))
|
|
self.addParameter(ParameterString(self.DATE_FORMAT,
|
|
'Date format (if order field is DateTime)', '', optional=True))
|
|
self.addParameter(ParameterNumber(
|
|
self.GAP_PERIOD,
|
|
'Gap period (if order field is DateTime)', 0, 60, 0))
|
|
self.addOutput(OutputVector(self.OUTPUT, 'Paths'))
|
|
|
|
def processAlgorithm(self, progress):
|
|
layer = dataobjects.getObjectFromUri(
|
|
self.getParameterValue(self.VECTOR))
|
|
groupField = self.getParameterValue(self.GROUP_FIELD)
|
|
orderField = self.getParameterValue(self.ORDER_FIELD)
|
|
dateFormat = unicode(self.getParameterValue(self.DATE_FORMAT))
|
|
gap = int(self.getParameterValue(self.GAP_PERIOD))
|
|
|
|
fields = QgsFields()
|
|
fields.append(QgsField('group', QVariant.String, '', 254, 0))
|
|
fields.append(QgsField('begin', QVariant.String, '', 254, 0))
|
|
fields.append(QgsField('end', QVariant.String, '', 254, 0))
|
|
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(
|
|
fields, QGis.WKBLineString, layer.dataProvider().crs())
|
|
|
|
points = dict()
|
|
features = vector.features(layer)
|
|
total = 100.0 / len(features)
|
|
for count, f in enumerate(features):
|
|
point = f.geometry().asPoint()
|
|
group = f[groupField]
|
|
order = f[orderField]
|
|
if dateFormat != '':
|
|
order = datetime.strptime(unicode(order), dateFormat)
|
|
if group in points:
|
|
points[group].append((order, point))
|
|
else:
|
|
points[group] = [(order, point)]
|
|
|
|
progress.setPercentage(int(count * total))
|
|
|
|
progress.setPercentage(0)
|
|
|
|
count = 0
|
|
total = 100.0 / len(points)
|
|
for k, v in points.iteritems():
|
|
v.sort()
|
|
f = QgsFeature()
|
|
f.initAttributes(len(fields))
|
|
f.setFields(fields)
|
|
f['group'] = k
|
|
f['begin'] = v[0][0]
|
|
f['end'] = v[-1][0]
|
|
line = []
|
|
for node in v:
|
|
line.append(node[1])
|
|
f.setGeometry(QgsGeometry.fromPolyline(line))
|
|
writer.addFeature(f)
|
|
count += 1
|
|
progress.setPercentage(int(count * total))
|
|
|
|
del writer
|