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ridgeToPoint_Dock.py
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ridgeToPoint_Dock.py
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# -*- coding: utf-8 -*-
"""
/***************************************************************************
reOrderDock
Dock for reOrder script
Option dock initialize
-------------------
begin : 2018-04-16
last : 2017-04-16
copyright : (C) 2017 by Peillet Sebastien
email : [email protected]
***************************************************************************/
/***************************************************************************
* *
* 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. *
* *
***************************************************************************/
"""
import os
import math
from datetime import datetime
from PyQt4.QtGui import QColor
from PyQt4 import QtGui, uic
from PyQt4.QtCore import pyqtSignal, QVariant, Qt
from PyQt4 import QtCore
from qgis.core import QgsVectorLayer, QgsVectorFileWriter, QgsVectorDataProvider, QgsField, \
QgsExpression, QgsFeatureRequest, QgsRasterPipe, QgsRasterFileWriter, \
QgsRectangle, QgsRasterLayer, QgsFeature, QgsPoint, QgsGeometry, QgsRaster, \
QgsCoordinateReferenceSystem
FORM_CLASS, _ = uic.loadUiType(os.path.join(
os.path.dirname(__file__), 'ridgeToPointDock.ui'))
class Timer():
"""Processing timer"""
startTimes = dict()
stopTimes = dict()
@staticmethod
def start(key=0):
"""Start the timer"""
Timer.startTimes[key] = datetime.now()
Timer.stopTimes[key] = None
@staticmethod
def stop(key=0):
"""Stop the timer"""
Timer.stopTimes[key] = datetime.now()
@staticmethod
def show(key=0):
"""Print computation time"""
if key in Timer.startTimes:
if Timer.startTimes[key] is not None:
if key in Timer.stopTimes:
if Timer.stopTimes[key] is not None:
delta = Timer.stopTimes[key] - Timer.startTimes[key]
print 'Timer delta: %s' % delta
class ridgeToPointDock(QtGui.QDockWidget, FORM_CLASS):
"""Convert ridge line to point"""
closingPlugin = pyqtSignal()
def __init__(self, iface, list_vect, list_vect_ind, list_rast, list_rast_ind, parent=None):
"""Dock initialization"""
super(ridgeToPointDock, self).__init__(parent)
self.setupUi(self)
self.lines_layer = None
self.dem_layer = None
self.output_path = None
self.id_line = None
self.min_dist = None
self.iface = iface
self.canvas = self.iface.mapCanvas()
self.list_vect = list_vect
self.list_vect_ind = list_vect_ind
self.list_rast = list_rast
self.list_rast_ind = list_rast_ind
self.initCombo()
self.launchButton.clicked.connect(self.launchR2P)
self.connect(self.lineComboBox, QtCore.SIGNAL("currentIndexChanged(const QString)"), self.idComboInit)
self.canvas.layersChanged.connect(self.layersUpdate)
self.connect(self, QtCore.SIGNAL('triggered()'), self.closeEvent)
def closeEvent(self, event):
"""Close dock"""
print 'Closing RidgeToPoint dock.'
self.close()
def initCombo(self):
"""Fill layer combo box of the dock"""
layers = self.iface.legendInterface().layers()
self.lineComboBox.addItems(self.list_vect)
selected_line = self.lineComboBox.currentIndex()
self.lines_layer = layers[self.list_vect_ind[selected_line]]
self.idComboInit()
self.DEMComboBox.addItems(self.list_rast)
def idComboInit(self):
"""Fill combo box"""
layers = self.iface.legendInterface().layers()
self.idLineComboBox.clear()
selected_line = self.lineComboBox.currentIndex()
self.lines_layer = layers[self.list_vect_ind[selected_line]]
attr_ind = self.lines_layer.attributeList()
attr_list = []
for ind in attr_ind:
attr_list.append(self.lines_layer.attributeDisplayName(ind))
self.idLineComboBox.addItems(attr_list)
def layersUpdate(self):
"""Update layer list"""
track_text = self.lineComboBox.currentText()
dem_text = self.DEMComboBox.currentText()
self.listRastLayer()
self.listVectLayer()
track_ind = self.lineComboBox.findText(track_text)
dem_ind = self.DEMComboBox.findText(dem_text)
if track_ind != -1:
self.lineComboBox.setCurrentIndex(track_ind)
if dem_ind != -1:
self.DEMComboBox.setCurrentIndex(dem_ind)
layers = self.iface.legendInterface().layers()
selected_line = self.lineComboBox.currentIndex()
self.lines_layer = layers[self.list_vect_ind[selected_line]]
self.idComboInit()
return None
def listRastLayer(self):
"""List raster inputs for the DEM selection"""
# clear list and index
self.DEMComboBox.clear()
self.DEMComboBox.clearEditText()
self.list_rast = []
self.list_rast_ind = []
layers = self.iface.legendInterface().layers()
index = 0
for layer in layers:
if layer.type() == 1:
self.list_rast.append(layer.name())
self.list_rast_ind.append(index)
index += 1
self.DEMComboBox.addItems(self.list_rast)
def listVectLayer(self):
"""List line layer for the track selection"""
# clear list and index
self.lineComboBox.clear()
self.lineComboBox.clearEditText()
self.list_vect = []
self.list_vect_ind = []
layers = self.iface.legendInterface().layers()
index = 0
for layer in layers:
if layer.type() == 0:
if layer.geometryType() == 1:
self.list_vect.append(layer.name())
self.list_vect_ind.append(index)
index += 1
self.lineComboBox.addItems(self.list_vect)
def launchR2P(self):
"""Ridge to Point conversion"""
layers = self.iface.legendInterface().layers()
# Get index of combo box
selected_line = self.lineComboBox.currentIndex()
selected_dem_layer = self.DEMComboBox.currentIndex()
# Get layer that fit with the combo box index
self.lines_layer = layers[self.list_vect_ind[selected_line]]
self.dem_layer = layers[self.list_rast_ind[selected_dem_layer]]
self.min_dist = self.minLengthBox.value()
self.id_line = self.idLineComboBox.currentText()
self.output_path = self.outputEdit.text()
l_done = []
time = Timer()
time.start()
tmp_path = os.path.dirname(self.lines_layer.source())
# Extract all points of interest (start of line, end of line, peak, pass) from polyline layer
pointPassage, crs, self.dem_layer = passPointSeek(self.lines_layer, self.id_line, self.dem_layer, tmp_path)
output_filename = os.path.join(os.path.dirname(self.output_path), r'temp.shp')
QgsVectorFileWriter.writeAsVectorFormat(pointPassage, output_filename, "utf-8", crs, "ESRI Shapefile")
pointPassage = None
pointPassage = QgsVectorLayer(output_filename, 'pointpassage', "ogr")
print 'R2P: Remove small ridge part'
ids_rem = []
orphans = []
for pt in pointPassage.getFeatures():
pt_id = pt.id()
pt_geom = pt.geometry().asPoint()
pt_x, pt_y = pt_geom
bounding_box_buff = QgsRectangle(pt_x - self.min_dist, pt_y - self.min_dist, pt_x + self.min_dist, pt_y + self.min_dist)
pts_near_it = pointPassage.getFeatures(QgsFeatureRequest().setFilterRect(bounding_box_buff))
for pt_near in pts_near_it:
pt_near_id = pt_near.id()
if pt_near_id != pt_id:
dist = math.sqrt(pt_geom.sqrDist(pt_near.geometry().asPoint()))
if dist != 0 and dist < self.min_dist:
pt_Tid = pt.attribute('T_id')
res = pt_Tid.split('p')
l_id1 = res[0]
pt_near_Tid = pt_near.attribute('T_id')
res = pt_near_Tid.split('p')
l_id2 = res[0]
if l_id1 == l_id2 and ((pt_Tid[-1] == 's' and pt_near_Tid[-1] == 'e') or (pt_Tid[-1] == 'e' and pt_near_Tid[-1] == 's')):
if pt_id not in ids_rem:
ids_rem.append(pt_id)
if pt_near_id not in ids_rem:
ids_rem.append(pt_near_id)
# if pt_Tid in orphans:
# orphans.remove(pt_Tid)
# if pt_near_Tid in orphans:
# orphans.remove(pt_near_Tid)
BB1 = pt.geometry().buffer(3, 4).boundingBox()
BB2 = pt_near.geometry().buffer(3, 4).boundingBox()
for feat1 in pointPassage.getFeatures(QgsFeatureRequest(QgsExpression("nature='start' or nature='end'")).setFilterRect(BB1)):
tid1 = feat1.attribute("T_id")
if feat1.id() not in ids_rem and tid1 not in orphans:
orphans.append(tid1)
for feat2 in pointPassage.getFeatures(QgsFeatureRequest(QgsExpression("nature='start' or nature='end'")).setFilterRect(BB2)):
tid2 = feat2.attribute("T_id")
if feat2.id() not in ids_rem and tid2 not in orphans:
orphans.append(tid2)
pointPassage.startEditing()
pointPassage.dataProvider().deleteFeatures(ids_rem)
pointPassage.commitChanges()
# Find link point between seperate line
print 'R2P: Find link point between seperate line'
already_done = []
geom_to_change = []
for pt in pointPassage.getFeatures():
if pt.attribute('T_id') in orphans:
pt_id = pt.id()
pt_nat = pt.attribute('nature')
if pt_nat == 'end':
pt_nat_opp = 'start'
else:
pt_nat_opp = 'end'
pt_opp_it = None
pt_opp_it = pointPassage.getFeatures(QgsFeatureRequest(QgsExpression("L_id = '%s' and nature='%s'" % (pt.attribute('L_id'), pt_nat_opp))))
pt_opp = next(pt_opp_it)
pt_opp_geom = pt_opp.geometry().asPoint()
pt_opp_buff = pt_opp.geometry().buffer(1, 4).boundingBox()
pt_opp_near_it = pointPassage.getFeatures(QgsFeatureRequest(QgsExpression("L_id != '%s'" % (pt_opp.attribute('L_id')))))
list_opp = [pt_opp_near.attribute('T_id') for pt_opp_near in pt_opp_near_it]
list_opp.append(pt_opp.attribute('T_id'))
pt_geom = pt.geometry().asPoint()
pt_x, pt_y = pt_geom
bounding_box_buff = QgsRectangle(pt_x - self.min_dist*2, pt_y - self.min_dist*2, pt_x + self.min_dist*2, pt_y + self.min_dist*2)
pts_near_it = pointPassage.getFeatures(QgsFeatureRequest().setFilterRect(bounding_box_buff))
list_id = []
w0 = 0
id0 = pt_id
act_dist = None
list_line = []
for pt_near in pts_near_it:
pt_near_id = pt_near.id()
pt_near_Tid = pt_near.attribute('T_id')
pt_near_geom = pt_near.geometry().asPoint()
if pt_near_id != pt_id and pt_near_Tid in orphans and pt_near_geom != pt_opp_geom:
dist = math.sqrt(pt_geom.sqrDist(pt_near_geom))
if dist != 0 and dist < self.min_dist*2:
pt_Tid = pt.attribute('T_id')
res = pt_Tid.split('p')
l_id1 = res[0]
res = pt_near_Tid.split('p')
l_id2 = res[0]
if pt_id not in already_done and l_id1 != l_id2 and l_id2 not in list_line and pt_Tid[-1] in ['s', 'e'] and pt_near_Tid[-1] in ['s', 'e']:
list_id.append(pt_near_id)
list_line.append(l_id2)
w0 += dist
already_done.append(pt_id)
for id in list_id:
point1 = next(pointPassage.getFeatures(QgsFeatureRequest().setFilterFid(id)))
point1_geom = point1.geometry().asPoint()
pt1_x, pt1_y = point1_geom
bounding_box_buff1 = QgsRectangle(pt_x - self.min_dist*2, pt_y - self.min_dist*2, pt_x + self.min_dist*2, pt_y + self.min_dist*2)
pts1_near_it = pointPassage.getFeatures(QgsFeatureRequest().setFilterRect(bounding_box_buff1))
w = 0
for opoint in pts1_near_it:
if id != opoint.id() and opoint.attribute('T_id') in orphans:
opoint_geom = opoint.geometry().asPoint()
p = math.sqrt(point1_geom.sqrDist(opoint_geom))
w += p
if w < w0:
w0 = w
id0 = opoint.id()
already_done.append(id)
list_id.append(pt_id)
try:
list_id.remove(id0)
except ValueError:
continue
change = [id0, list_id]
geom_to_change.append(change)
for change in geom_to_change:
id_fix = change[0]
req = QgsFeatureRequest().setFilterFid(id_fix)
point_fix_it = pointPassage.getFeatures(req)
try:
for point_fix in point_fix_it:
geom_fix = point_fix.geometry()
# try:
# orphans.remove(point_fix.attribute("T_id"))
# except ValueError:
# continue
ids_change = change[1]
for id_change in ids_change:
req = QgsFeatureRequest().setFilterFid(id_change)
point_change_it = pointPassage.getFeatures(req)
point_change = next(point_change_it)
# try:
# orphans.remove(point_change.attribute("T_id"))
# except ValueError:
# continue
pointPassage.startEditing()
pointPassage.dataProvider().changeGeometryValues({id_change : geom_fix})
pointPassage.commitChanges()
pointPassage.updateExtents()
except StopIteration:
pass
print 'R2P: Find link point between seperate line'
already_done = []
geom_to_change = []
for pt in pointPassage.getFeatures():
pt_id = pt.id()
pt_geom = pt.geometry().asPoint()
pt_x, pt_y = pt_geom
bounding_box_buff = QgsRectangle(pt_x - self.min_dist, pt_y - self.min_dist, pt_x + self.min_dist, pt_y + self.min_dist)
pts_near_it = pointPassage.getFeatures(QgsFeatureRequest().setFilterRect(bounding_box_buff))
list_id = []
w0 = 0
id0 = pt_id
for pt_near in pts_near_it:
pt_near_id = pt_near.id()
pt_near_Tid = pt_near.attribute('T_id')
if pt_near_id != pt_id:
dist = math.sqrt(pt_geom.sqrDist(pt_near.geometry().asPoint()))
if dist != 0 and dist < self.min_dist:
pt_Tid = pt.attribute('T_id')
res = pt_Tid.split('p')
l_id1 = res[0]
res = pt_near_Tid.split('p')
l_id2 = res[0]
if pt_id not in already_done and l_id1 != l_id2 and pt_Tid[-1] in ['s', 'e'] and pt_near_Tid[-1] in ['s', 'e']:
list_id.append(pt_near_id)
w0 += dist
already_done.append(pt_id)
for id in list_id:
point1 = next(pointPassage.getFeatures(QgsFeatureRequest().setFilterFid(id)))
point1_geom = point1.geometry().asPoint()
pt1_x, pt1_y = point1_geom
bounding_box_buff1 = QgsRectangle(pt_x - self.min_dist, pt_y - self.min_dist, pt_x + self.min_dist, pt_y + self.min_dist)
pts1_near_it = pointPassage.getFeatures(QgsFeatureRequest().setFilterRect(bounding_box_buff1))
w = 0
for opoint in pts1_near_it:
if id != opoint.id():
opoint_geom = opoint.geometry().asPoint()
p = math.sqrt(point1_geom.sqrDist(opoint_geom))
w += p
if w < w0:
w0 = w
id0 = opoint.id()
already_done.append(id)
list_id.append(pt_id)
try:
list_id.remove(id0)
except ValueError:
continue
change = [id0, list_id]
geom_to_change.append(change)
for change in geom_to_change:
id_fix = change[0]
req = QgsFeatureRequest().setFilterFid(id_fix)
point_fix_it = pointPassage.getFeatures(req)
try:
for point_fix in point_fix_it:
geom_fix = point_fix.geometry()
ids_change = change[1]
for id_change in ids_change:
pointPassage.startEditing()
pointPassage.dataProvider().changeGeometryValues({id_change: geom_fix})
pointPassage.commitChanges()
pointPassage.updateExtents()
except StopIteration:
pass
# Remove small ridge part at the end/start of a line
print 'R2P: Remove small ridge part at the end/start of a line'
geom_to_change = []
list_id = []
for pt in pointPassage.getFeatures():
pt_id = pt.id()
pt_geom = pt.geometry().asPoint()
pt_x, pt_y = pt_geom
bounding_box_buff = QgsRectangle(pt_x - self.min_dist, pt_y - self.min_dist, pt_x + self.min_dist, pt_y + self.min_dist)
pts_near_it = pointPassage.getFeatures(QgsFeatureRequest().setFilterRect(bounding_box_buff))
for pt_near in pts_near_it:
pt_near_id = pt_near.id()
if pt_near_id != pt_id:
dist = math.sqrt(pt_geom.sqrDist(pt_near.geometry().asPoint()))
if dist != 0 and dist < self.min_dist:
pt_Tid = pt.attribute('T_id')
res = pt_Tid.split('p')
l_id1 = res[0]
pt_near_Tid = pt_near.attribute('T_id')
res = pt_near_Tid.split('p')
l_id2 = res[0]
if l_id1 == l_id2 and pt_Tid[-1] in ['s', 'e'] and pt_near_Tid[-1] not in ['s', 'e'] and pt_near_Tid not in list_id:
change = [pt_id, pt_near_id]
list_id.append(pt_near_Tid)
geom_to_change.append(change)
id_rm = []
print 'R2P: geom_to_change: %s' % geom_to_change
for change in geom_to_change:
id_fix = change[0]
req = QgsFeatureRequest().setFilterFid(id_fix)
point_fix_it = pointPassage.getFeatures(req)
point_fix = next(point_fix_it)
try:
id_change = change[1]
req = QgsFeatureRequest().setFilterFid(id_change)
point_ch_it = pointPassage.getFeatures(req)
for point_ch in point_ch_it:
if point_fix.attribute('T_id')[-1] == 'e':
if int(point_ch.attribute('P_id')) < int(point_fix.attribute('P_id')):
pointPassage.startEditing()
pointPassage.changeAttributeValue(id_fix, 2, point_ch.attribute('P_id'))
pointPassage.commitChanges()
else:
pointPassage.startEditing()
pointPassage.changeAttributeValue(id_fix, 2, point_ch.attribute('P_id'))
pointPassage.commitChanges()
id_rm.append(id_change)
except StopIteration:
pass
pointPassage.startEditing()
pointPassage.deleteFeatures(id_rm)
pointPassage.commitChanges()
pointPassage.updateExtents()
# First attempt
print 'R2P: First attempt'
already_done = []
geom_to_change = []
for pt in pointPassage.getFeatures():
pt_id = pt.id()
pt_geom = pt.geometry().asPoint()
pt_x, pt_y = pt_geom
bounding_box_buff = QgsRectangle(pt_x - self.min_dist, pt_y - self.min_dist, pt_x + self.min_dist, pt_y + self.min_dist)
pts_near_it = pointPassage.getFeatures(QgsFeatureRequest().setFilterRect(bounding_box_buff))
list_id = []
w0 = 0
id0 = pt_id
for pt_near in pts_near_it:
pt_near_id = pt_near.id()
if pt_near_id != pt_id:
dist = math.sqrt(pt_geom.sqrDist(pt_near.geometry().asPoint()))
if dist != 0 and dist < self.min_dist:
pt_Tid = pt.attribute('T_id')
res = pt_Tid.split('p')
l_id1 = res[0]
pt_near_Tid = pt_near.attribute('T_id')
res = pt_near_Tid.split('p')
l_id2 = res[0]
if pt_id not in already_done and pt_near_id not in already_done and l_id1 == l_id2:
pt1_elev = self.dem_layer.dataProvider().identify(pt_geom, QgsRaster.IdentifyFormatValue)
pt2_elev = self.dem_layer.dataProvider().identify(pt_near.geometry().asPoint(), QgsRaster.IdentifyFormatValue)
already_done.append(pt_id)
already_done.append(pt_near_id)
if pt.attribute('T_id')[-1] == 'd' and pt_near.attribute('T_id') == 'd':
if pt1_elev > pt2_elev:
change = pt_Tid
else:
change = pt_near_Tid
else:
if pt1_elev < pt2_elev:
change = pt_Tid
else:
change = pt_near_Tid
geom_to_change.append(change)
print'R2P: geom_to_change: %s' % geom_to_change
for change in geom_to_change:
print 'R2P: change: %s' % change
id_fix = change
req = QgsFeatureRequest().setFilterExpression("T_id = '%s'" % (id_fix))
point_rm_it = pointPassage.getFeatures(req)
point_rm = point_rm_it.next()
id_rm = point_rm.id()
line_id = point_rm.attribute('L_id')
point_pid = int(point_rm.attribute('P_id'))
nat = point_rm.attribute('nature')
fin = 0
count = 1
found = False
if nat == 'end':
fin = 1
else:
pointPassage.startEditing()
while True:
if found:
point_pid += 1
req = QgsFeatureRequest().setFilterExpression("L_id ='%s' and P_id = '%s'" % (line_id, str(point_pid + count)))
point_nxt_it = pointPassage.getFeatures(req)
found = False
point_nxt = None
try:
point_nxt = next(point_nxt_it)
except StopIteration:
point_nxt = None
continue
if point_nxt != None:
pointPassage.changeAttributeValue(point_nxt.id(), 2, str(point_pid))
current_id = point_nxt.attribute('T_id')
if current_id[-1] == 'e':
break
print 'R2P: current_id: %s' % current_id
found = True
count = 1
else:
count += 1
found = False
pointPassage.deleteFeatures([id_rm])
pointPassage.commitChanges()
pointPassage.updateExtents()
time.stop()
print 'R2P: Processing Time:'
time.show()
error = QgsVectorFileWriter.writeAsVectorFormat(pointPassage, self.output_path, "utf-8", crs, "ESRI Shapefile")
if error == QgsVectorFileWriter.NoError:
print "R2P: Success!"
out_layer = self.iface.addVectorLayer(self.output_path, "", "ogr")
if not out_layer:
print "R2P: Layer failed to load!"
def passPointSeek(crete_layer, ID_crete, dem_layer, PassagePoint):
"""Seeks passage points (peak, col) along ridge
Extract all points of interest (start of line, end of line, peak, pass) from polyline layer
"""
# Load ridge line layer
inCRS = crete_layer.crs().authid()
crs = QgsCoordinateReferenceSystem(inCRS)
# Load dem_layer layer
x_res = dem_layer.rasterUnitsPerPixelX()
y_res = dem_layer.rasterUnitsPerPixelY()
# Create memory layer to store result
pointPassage = QgsVectorLayer("Point", "point", 'memory')
pointPassage.setCrs(crs)
name_T_id = "T_id"
name_L_id = "L_id"
name_P_id = "P_id"
name_nat = "nature"
provider = pointPassage.dataProvider()
caps = provider.capabilities()
if caps & QgsVectorDataProvider.AddAttributes:
res = provider.addAttributes([QgsField(name_T_id, QVariant.String), QgsField(name_L_id, QVariant.String), QgsField(name_P_id, QVariant.String), QgsField(name_nat, QVariant.String)])
pointPassage.updateFields()
pointPassage.startEditing()
# Loop over features
for feature in crete_layer.getFeatures():
feat_L_id = feature.attribute(ID_crete)
geomType = feature.geometry().wkbType()
if geomType == 2:
geom = feature.geometry().asPolyline()
nb = len(geom)
geom_clean = feature.geometry().asPolyline()
ind = 0
for i in range(0, nb - 1):
pt1 = geom[i]
x1 = pt1.x()
if x1 % 10 == 2:
x1 += 0.5
elif x1 % 10 == 8:
x1 += -0.5
y1 = pt1.y()
if y1 % 10 == 2:
y1 += 0.5
elif y1 % 10 == 8:
y1 += -0.5
pt2 = geom[i + 1]
x2 = pt2.x()
if x2 % 10 == 2:
x2 += 0.5
elif x2 % 10 == 8:
x2 += -0.5
y2 = pt2.y()
if y2 % 10 == 2:
y2 += 0.5
elif y2 % 10 == 8:
y2 += -0.5
pt1 = QgsPoint(x1, y1)
pt2 = QgsPoint(x2, y2)
dist = math.sqrt(pt1.sqrDist(pt2))
if dist > math.sqrt(x_res*x_res + y_res*y_res) + 1:
azimuth = pt1.azimuth(pt2)
if azimuth % 10 != 0:
decoup_dist = math.sqrt(x_res*x_res + y_res*y_res)
else:
decoup_dist = x_res
tot_distance = 0
pts = []
while tot_distance/x_res < dist/x_res:
tot_distance += decoup_dist
xv = round(tot_distance*math.sin(math.radians(azimuth)))
yv = round(tot_distance*math.cos(math.radians(azimuth)))
# print xv, yv, tot_distance, azimuth, x1, y1, x2, y2
pt = QgsPoint(pt1.x() + xv, pt1.y() + yv)
pts.append(pt)
pt1_elev = dem_layer.dataProvider().identify(pt1, QgsRaster.IdentifyFormatValue)
pt2_elev = dem_layer.dataProvider().identify(pt2, QgsRaster.IdentifyFormatValue)
min_elev = min(pt1_elev, pt2_elev)
max_elev = max(pt1_elev, pt2_elev)
points_elev = []
min_list = None
max_list = None
max_id = None
min_id = None
for j, point in enumerate(pts):
elev = dem_layer.dataProvider().identify(point, QgsRaster.IdentifyFormatValue)
if elev < min_elev:
if min_list == None or elev < min_list:
min_list = elev
min_id = j
if elev > max_elev:
if max_list == None or elev < max_list:
max_list = elev
max_id = j
if max_id != None and min_id != None:
if max_id < min_id:
geom_clean.insert(i + 1 + ind, pts[max_id])
geom_clean.insert(i + 2 + ind, pts[min_id])
ind += 2
else:
geom_clean.insert(i + 2 + ind, pts[min_id])
geom_clean.insert(i + 1 + ind, pts[max_id])
ind += 2
elif max_id != None and min_id == None:
geom_clean.insert(i + 1 + ind, pts[max_id])
ind += 1
elif min_id != None and max_id == None:
geom_clean.insert(i + 1 + ind, pts[min_id])
ind += 1
nb = len(geom_clean)
elev_list = []
for point in geom_clean:
elev = dem_layer.dataProvider().identify(point, QgsRaster.IdentifyFormatValue)
elev_list.append(elev.results()[1])
count = 0
for i in range(0, nb):
feat_point = QgsFeature()
try:
if i == 0:
feat_point.setGeometry(QgsGeometry.fromPoint(geom[0]))
nat = 's'
t_id = 'l' + str(feat_L_id) + 'p' + str(count) + nat
feat_point.setAttributes([t_id, feat_L_id, count, 'start'])
count += 1
pointPassage.dataProvider().addFeatures([feat_point])
elif i == nb - 1:
feat_point.setGeometry(QgsGeometry.fromPoint(geom[-1]))
nat = 'e'
t_id = 'l' + str(feat_L_id) + 'p' + str(count) + nat
feat_point.setAttributes([t_id, feat_L_id, count, 'end'])
count += 1
pointPassage.dataProvider().addFeatures([feat_point])
elif i < 3:
pass
elif i > nb - 3:
pass
else:
feat_point.setGeometry(QgsGeometry.fromPoint(geom_clean[i]))
min_elev1 = min(elev_list[i - 3], elev_list[i - 2], elev_list[i - 1])
min_elev2 = min(elev_list[i + 3], elev_list[i + 2], elev_list[i + 1])
max_elev1 = max(elev_list[i - 3], elev_list[i - 2], elev_list[i - 1])
max_elev2 = max(elev_list[i + 3], elev_list[i + 2], elev_list[i + 1])
if elev_list[i] < min_elev1 and elev_list[i] <= min_elev2:
nat = 'd'
t_id = 'l' + str(feat_L_id) + 'p' + str(count) + nat
feat_point.setAttributes([t_id, feat_L_id, count, 'col'])
count += 1
pointPassage.dataProvider().addFeatures([feat_point])
if elev_list[i] >= max_elev1 and elev_list[i] > max_elev2:
nat = 't'
t_id = 'l' + str(feat_L_id) + 'p' + str(count) + nat
feat_point.setAttributes([t_id, feat_L_id, count, 'pic'])
count += 1
pointPassage.dataProvider().addFeatures([feat_point])
pointPassage.commitChanges()
pointPassage.updateExtents()
except:
pass
else:
print 'PPS: no multiline'
return pointPassage, crs, dem_layer