def processing_alghelp(_, request):
"""Retrieve arguments and usage information of a Processing algorithm.
HTTP query arguments:
alg (string): the name of the algorithm for which to show the help
Returns:
An array of strings describing the algorithm as well as its arguments.
"""
with GetStdOut() as alghelp:
processing.alghelp(request.args['alg'])
# strip parameter-initial tabs and remove blank lines
return NetworkAPIResult([line.strip() for line in alghelp if line])
#Initialisierung und Beenden von QGIS in Python:
# Import modules
import sys
from qgis.core import *
from qgis.gui import *
from PyQt4.QtCore import *
from PyQt4.QtGui import *
from qgis.utils import *
# Configure QGIS directories and start the app
# Not to be used in QGIS python editor
app = QgsApplication([], True)
QgsApplication.setPrefixPath("/usr", True)
QgsApplication.initQgis()
sys.path.append("/usr/share/qgis/python/plugins")
import processing
from processing.core.Processing import Processing
from processing.tools import *
Processing.initialize()
# now do processing.runalg(...) - needs loaded Layer first
inputVectorFile = '/home/jorge/Escritorio/CCAA/Comunidades_Autonomas_ETRS89_30N.shp'
vecLayer = QgsVectorLayer(inputVectorFile, 'myVecLayer', 'ogr')
processing.alghelp('grass:v.buffer.distance')
processing.runalg('qgis:fixeddistancebuffer', vecLayer, 30, 10, False,
'/tmp/buff.shp')
# ...
# finish app at the end
QgsApplication.exitQgis()
def runAlgorithm(algOrName, onFinish, *args):
if isinstance(algOrName, GeoAlgorithm):
alg = algOrName
else:
alg = Processing.getAlgorithm(algOrName)
if alg is None:
print 'Error: Algorithm not found\n'
return
if len(args) != alg.getVisibleParametersCount() \
+ alg.getVisibleOutputsCount():
print 'Error: Wrong number of parameters'
processing.alghelp(algOrName)
return
alg = alg.getCopy()
if isinstance(args, dict):
# Set params by name
for (name, value) in args.items():
if alg.getParameterFromName(name).setValue(value):
continue
if alg.getOutputFromName(name).setValue(value):
continue
print 'Error: Wrong parameter value %s for parameter %s.' \
% (value, name)
return
else:
i = 0
for param in alg.parameters:
if not param.hidden:
if not param.setValue(args[i]):
print 'Error: Wrong parameter value: ' \
+ unicode(args[i])
return
i = i + 1
for output in alg.outputs:
if not output.hidden:
if not output.setValue(args[i]):
print 'Error: Wrong output value: ' + unicode(args[i])
return
i = i + 1
msg = alg.checkParameterValuesBeforeExecuting()
if msg:
print 'Unable to execute algorithm\n' + msg
return
if not alg.checkInputCRS():
print 'Warning: Not all input layers use the same CRS.\n' \
+ 'This can cause unexpected results.'
ProcessingLog.addToLog(ProcessingLog.LOG_ALGORITHM, alg.getAsCommand())
# Don't set the wait cursor twice, because then when you
# restore it, it will still be a wait cursor.
cursor = QApplication.overrideCursor()
if cursor is None or cursor == 0:
QApplication.setOverrideCursor(QCursor(Qt.WaitCursor))
elif cursor.shape() != Qt.WaitCursor:
QApplication.setOverrideCursor(QCursor(Qt.WaitCursor))
progress = SilentProgress()
if iface is not None :
progress = MessageBarProgress()
ret = UnthreadedAlgorithmExecutor.runalg(alg, progress)
if onFinish is not None and ret:
onFinish(alg, progress)
QApplication.restoreOverrideCursor()
progress.close()
return alg
for i, j in reversed(list(enumerate(field_names))):
if j not in accepted_attributes:
layer.deleteAttribute(i)
print "--> Columns deleted.\n"
# Export attribute table as csv file
SLIC_attr = os.getcwd() + r"\39_SLIC_attr.csv"
if not os.path.isfile(SLIC_attr):
QgsVectorFileWriter.writeAsVectorFormat(layer, SLIC_attr, "utf-8", None,
"CSV")
print "--> Attribute table exported.\n"
QgsMapLayerRegistry.instance().removeMapLayers([layer.id()])
print "All processing finished."
"""
### Notes ###
# QGIS help
import processing
processing.alghelp("qgis:fieldcalculator")
processing.alghelp("grass7:v.clean")
processing.alglist("g.extension")
# Code Snippets
# Add boundary field per line segment
SLIC_boundary = os.getcwd() + r"\24_SLIC_final.shp"
if not os.path.isfile(SLIC_boundary):
processing.runalg('qgis:addfieldtoattributestable',
{"INPUT_LAYER": SLIC_dsm_gradient,
"FIELD_NAME": "boundary",
# Silence the error "UserWarning: Matplotlib is building the font cache using fc-list. This may take a moment.", see https://github.com/matplotlib/matplotlib/issues/5836#issuecomment-179592427
with warnings.catch_warnings():
warnings.simplefilter("ignore")
from processing.core.Processing import Processing
from processing.core.Processing import ProcessingConfig
Processing.initialize()
import processing
# Manually set the OTB path, see https://github.com/qgis/QGIS/blob/master/python/plugins/processing/core/ProcessingConfig.py and https://github.com/qgis/QGIS/blob/master/python/plugins/processing/algs/otb/OTBUtils.py
ProcessingConfig.setSettingValue("OTB_FOLDER", os.getenv('OTB_FOLDER', ''))
ProcessingConfig.setSettingValue("OTB_LIB_FOLDER",
os.getenv('OTB_LIB_FOLDER', ''))
print("###### Algorithm help and options:")
processing.alghelp("modeler:docker")
processing.algoptions("modeler:docker")
# Helper function for creating output directory
import errno
def make_sure_path_exists(path):
try:
os.makedirs(path)
except OSError as exception:
if exception.errno != errno.EEXIST:
raise
# Run model, use current timestamp for output directory name
#------------------------------------------------------------------------------------------------
#----------------------------------------#
#--- Load processing tools to console ---#
#----------------------------------------#
#Load processing algorithms
import processing
#List of algorithm within processing
processing.alglist()
#Points related algorithms
processing.alglist("point")
#Processing tool example
processing.alghelp("saga:slopeaspectcurvature")
#Processing especification from polygon centroids
processing.alghelp("saga:polygoncentroids")
#ALGORITHM: Polygon centroids
# POLYGONS <ParameterVector>
# METHOD <ParameterBoolean>
# CENTROIDS <OutputVector>
processing.algoptions("saga:polygoncentroids")
#--- Load a shapefile
wd = "C:/Users/PC-600/Dropbox (Farmers Edge)/MuriloVianna/DB/SoilDB/ISRIC/ISRIC_250m/costumers"
fn = "BLDFIE_M_sl1_250m_NA_ChapadaodaAtlantica_Subfield1972585_Zoning87346_NIR_NB_20150806.shp"
def runAlgorithm(algOrName, onFinish, *args):
if isinstance(algOrName, GeoAlgorithm):
alg = algOrName
else:
alg = Processing.getAlgorithm(algOrName)
if alg is None:
print 'Error: Algorithm not found\n'
return
alg = alg.getCopy()
if len(args) == 1 and isinstance(args[0], dict):
# Set params by name and try to run the alg even if not all parameter values are provided,
# by using the default values instead.
setParams = []
for (name, value) in args[0].items():
param = alg.getParameterFromName(name)
if param and param.setValue(value):
setParams.append(name)
continue
output = alg.getOutputFromName(name)
if output and output.setValue(value):
continue
print 'Error: Wrong parameter value %s for parameter %s.' \
% (value, name)
ProcessingLog.addToLog(ProcessingLog.LOG_ERROR,
Processing.tr('Error in %s. Wrong parameter value %s for parameter %s.') \
% (alg.name, value, name))
return
# fill any missing parameters with default values if allowed
for param in alg.parameters:
if param.name not in setParams:
if not param.setValue(None):
print(
'Error: Missing parameter value for parameter %s.'
% (param.name))
ProcessingLog.addToLog(ProcessingLog.LOG_ERROR,
Processing.tr('Error in %s. Missing parameter value for parameter %s.') \
% (alg.name, param.name))
return
else:
if len(args) != alg.getVisibleParametersCount() \
+ alg.getVisibleOutputsCount():
print 'Error: Wrong number of parameters'
processing.alghelp(algOrName)
return
i = 0
for param in alg.parameters:
if not param.hidden:
if not param.setValue(args[i]):
print 'Error: Wrong parameter value: ' \
+ unicode(args[i])
return
i = i + 1
for output in alg.outputs:
if not output.hidden:
if not output.setValue(args[i]):
print 'Error: Wrong output value: ' + unicode(args[i])
return
i = i + 1
msg = alg.checkParameterValuesBeforeExecuting()
if msg:
print 'Unable to execute algorithm\n' + msg
return
if not alg.checkInputCRS():
print 'Warning: Not all input layers use the same CRS.\n' \
+ 'This can cause unexpected results.'
if iface is not None:
# Don't set the wait cursor twice, because then when you
# restore it, it will still be a wait cursor.
cursor = QApplication.overrideCursor()
if cursor is None or cursor == 0:
QApplication.setOverrideCursor(QCursor(Qt.WaitCursor))
elif cursor.shape() != Qt.WaitCursor:
QApplication.setOverrideCursor(QCursor(Qt.WaitCursor))
progress = None
if iface is not None:
progress = MessageBarProgress()
ret = runalg(alg, progress)
if onFinish is not None and ret:
onFinish(alg, progress)
if iface is not None:
QApplication.restoreOverrideCursor()
progress.close()
return alg
def runAlgorithm(algOrName, onFinish, *args):
if isinstance(algOrName, GeoAlgorithm):
alg = algOrName
else:
alg = Processing.getAlgorithm(algOrName)
if alg is None:
print 'Error: Algorithm not found\n'
return
if len(args) != alg.getVisibleParametersCount() \
+ alg.getVisibleOutputsCount():
print 'Error: Wrong number of parameters'
processing.alghelp(algOrName)
return
alg = alg.getCopy()
if isinstance(args, dict):
# Set params by name
for (name, value) in args.items():
if alg.getParameterFromName(name).setValue(value):
continue
if alg.getOutputFromName(name).setValue(value):
continue
print 'Error: Wrong parameter value %s for parameter %s.' \
% (value, name)
return
else:
i = 0
for param in alg.parameters:
if not param.hidden:
if not param.setValue(args[i]):
print 'Error: Wrong parameter value: ' \
+ unicode(args[i])
return
i = i + 1
for output in alg.outputs:
if not output.hidden:
if not output.setValue(args[i]):
print 'Error: Wrong output value: ' + unicode(args[i])
return
i = i + 1
msg = alg.checkParameterValuesBeforeExecuting()
if msg:
print 'Unable to execute algorithm\n' + msg
return
if not alg.checkInputCRS():
print 'Warning: Not all input layers use the same CRS.\n' \
+ 'This can cause unexpected results.'
ProcessingLog.addToLog(ProcessingLog.LOG_ALGORITHM, alg.getAsCommand())
# Don't set the wait cursor twice, because then when you
# restore it, it will still be a wait cursor.
cursor = QApplication.overrideCursor()
if cursor is None or cursor == 0:
QApplication.setOverrideCursor(QCursor(Qt.WaitCursor))
elif cursor.shape() != Qt.WaitCursor:
QApplication.setOverrideCursor(QCursor(Qt.WaitCursor))
progress = MessageBarProgress()
ret = UnthreadedAlgorithmExecutor.runalg(alg, progress)
if onFinish is not None and ret:
onFinish(alg, progress)
QApplication.restoreOverrideCursor()
progress.close()
return alg
#GARRET BENZ
#6/24/2019
#GEOG 682
path1 = "C:\Users\gbenz\Downloads\Crime_Incidents_in_2017\Crime_Incidents_in_2017.shp"
from PyQt4.QtGui import *
crime = QgsVectorLayer(path1, "Crime Incidents", "ogr")
QgsMapLayerRegistry.instance().addMapLayer(crime)
path2 = "C:\Users\gbenz\Downloads\Police_Districts\Police_Districts.shp"
districts = QgsVectorLayer(path2, "Police Districts", "ogr")
QgsMapLayerRegistry.instance().addMapLayer(districts)
import processing
processing.alghelp("qgis:joinattributesbylocation")
processing.runalg(
"qgis:joinattributesbylocation", {
"TARGET":
"C:\Users\gbenz\Downloads\Police_Districts\Police_Districts.shp",
"JOIN":
"C:\Users\gbenz\Downloads\Crime_Incidents_in_2017\Crime_Incidents_in_2017.shp",
"PREDICATE": u'contains',
"SUMMARY": 1,
"KEEP": 1,
"OUTPUT": "C:\Users\gbenz\Downloads\Police_Districts\joindata2.shp"
})
#Which police district had the most crimes in 2017? How many crimes occured there?
#ANSWER: The Second District reports the highest amount of crime with 5628 offenses recorded
import warnings; # Silence the error "UserWarning: Matplotlib is building the font cache using fc-list. This may take a moment.", see https://github.com/matplotlib/matplotlib/issues/5836#issuecomment-179592427
with warnings.catch_warnings():
warnings.simplefilter("ignore");
from processing.core.Processing import Processing
from processing.core.Processing import ProcessingConfig
Processing.initialize()
import processing
# Manually set the OTB path, see https://github.com/qgis/QGIS/blob/master/python/plugins/processing/core/ProcessingConfig.py and https://github.com/qgis/QGIS/blob/master/python/plugins/processing/algs/otb/OTBUtils.py
ProcessingConfig.setSettingValue("OTB_FOLDER", os.getenv('OTB_FOLDER', ''))
ProcessingConfig.setSettingValue("OTB_LIB_FOLDER", os.getenv('OTB_LIB_FOLDER', ''))
print("###### Algorithm help and options:")
processing.alghelp("modeler:docker")
processing.algoptions("modeler:docker")
# Helper function for creating output directory
import errno
def make_sure_path_exists(path):
try:
os.makedirs(path)
except OSError as exception:
if exception.errno != errno.EEXIST:
raise
# Run model, use current timestamp for output directory name
input_image = os.path.join(os.getenv('QGIS_WORKSPACE', os.getcwd()), "aasee_muenster_sentinel2.tif")
output_directory = os.path.join(os.getenv('QGIS_RESULT', os.path.join(tempfile.gettempdir(), 'results')), datetime.datetime.now().strftime("%Y%m%d-%H%M%S"))
make_sure_path_exists(output_directory)
# -*- coding: utf-8 -*-
#importar las funciones del procesamiento
import processing
#ahora necesitamos saber el algoritmo a usar
#para ello usamos el método alglist()
#si introduces alglist() te salen todos los métodos pero
#si pones entre los paréwntesis algún nombre, te hace el filtro
processing.alglist("merge")
#nos tiene que salir
#Merge vector layers---------------------------------->qgis:mergevectorlayers
#como ya sabemos lo que queremos usar
#usamos el método alghelp() para saber como es la sintaxis
processing.alghelp("qgis:mergevectorlayers")
#como ya sabemos la sintaxis, usamos ell sigueinte étodo
#para usar el algoritmo
#runalg(nombre del algoritmo,parámetro1,parámetro2,etc)
nom_layer_carret = r'E:\CURSO_PYQGIS\CAPAS\carreteras.shp'
nom_layer_rios = r'E:\CURSO_PYQGIS\CAPAS\rios.shp'
nom_resultado = r'E:\CURSO_PYQGIS\CAPAS_PROCESADAS\elementos_lineales.shp'
processing.runalg('qgis:mergevectorlayers', [nom_layer_carret, nom_layer_rios],
nom_resultado)
layer_lineas = QgsVectorLayer(
r'E:\CURSO_PYQGIS\CAPAS_PROCESADAS\elementos_lineales.shp', 'elem_lineal',
'ogr')
QgsMapLayerRegistry.instance().addMapLayer(layer_lineas)
# -*- coding: utf-8 -*-
# 1. QGIS Mac Version
import os
import sys
sys.path.append('/Applications/QGis.app/Contents/Resources/python/')
sys.path.append('/Applications/QGis.app/Contents/Resources/python/plugins') # if you want to use the processing module, for example
from qgis.core import *
app = QgsApplication([],True)
QgsApplication.setPrefixPath("/Applications/QGIS.app/Contents/Plugins", True)
QgsApplication.initQgis()
import processing # all the steps above need to be done on a mac version of qgis installed my kyngchaos
# initialize processing
from processing.core.Processing import Processing
Processing.initialize()
Processing.updateAlgsList()
# run algorithms
processing.alghelp("qgis:clip")
processing.runalg("qgis:clip",inputlayer,overlaylayer,"output_file.shp")
# Silence the error "UserWarning: Matplotlib is building the font cache using fc-list. This may take a moment.", see https://github.com/matplotlib/matplotlib/issues/5836#issuecomment-179592427
with warnings.catch_warnings():
warnings.simplefilter("ignore")
from processing.core.Processing import Processing
from processing.core.Processing import ProcessingConfig
Processing.initialize()
import processing
# Manually set the OTB path, see https://github.com/qgis/QGIS/blob/master/python/plugins/processing/core/ProcessingConfig.py and https://github.com/qgis/QGIS/blob/master/python/plugins/processing/algs/otb/OTBUtils.py
ProcessingConfig.setSettingValue("OTB_FOLDER", os.getenv('OTB_FOLDER', ''))
ProcessingConfig.setSettingValue("OTB_LIB_FOLDER",
os.getenv('OTB_LIB_FOLDER', ''))
print("###### Algorithm help and options:")
processing.alghelp("otb:unsupervisedkmeansimageclassification")
processing.algoptions("otb:unsupervisedkmeansimageclassification")
# Helper function for creating output directory
import errno
def make_sure_path_exists(path):
try:
os.makedirs(path)
except OSError as exception:
if exception.errno != errno.EEXIST:
raise
# Get number of classes from envrionment variable within the container
def runAlgorithm(algOrName, onFinish, *args):
if isinstance(algOrName, GeoAlgorithm):
alg = algOrName
else:
alg = Processing.getAlgorithm(algOrName)
if alg == None:
print("Error: Algorithm not found\n")
return
if len(args) != alg.getVisibleParametersCount() + alg.getVisibleOutputsCount():
print ("Error: Wrong number of parameters")
processing.alghelp(algOrName)
return
alg = alg.getCopy()
if isinstance(args, dict):
# set params by name
for name, value in args.items():
if alg.getParameterFromName(name).setValue(value):
continue;
if alg.getOutputFromName(name).setValue(value):
continue;
print ("Error: Wrong parameter value %s for parameter %s." % (value, name))
return
else:
i = 0
for param in alg.parameters:
if not param.hidden:
if not param.setValue(args[i]):
print ("Error: Wrong parameter value: " + unicode(args[i]))
return
i = i +1
for output in alg.outputs:
if not output.hidden:
if not output.setValue(args[i]):
print ("Error: Wrong output value: " + unicode(args[i]))
return
i = i +1
msg = alg.checkParameterValuesBeforeExecuting()
if msg:
print ("Unable to execute algorithm\n" + msg)
return
if not alg.checkInputCRS():
print ("Warning: Not all input layers use the same CRS.\n" +
"This can cause unexpected results.")
ProcessingLog.addToLog(ProcessingLog.LOG_ALGORITHM, alg.getAsCommand())
# don't set the wait cursor twice, because then when you restore it
# it will still be a wait cursor
cursor = QApplication.overrideCursor()
if cursor == None or cursor == 0:
QApplication.setOverrideCursor(QCursor(Qt.WaitCursor))
elif cursor.shape() != Qt.WaitCursor:
QApplication.setOverrideCursor(QCursor(Qt.WaitCursor))
useThreads = ProcessingConfig.getSetting(ProcessingConfig.USE_THREADS)
#this is doing strange things, so temporarily the thread execution is disabled from the console
useThreads = False
if useThreads:
algEx = AlgorithmExecutor(alg)
progress = QProgressDialog()
progress.setWindowTitle(alg.name)
progress.setLabelText("Executing %s..." % alg.name)
def finish():
QApplication.restoreOverrideCursor()
if onFinish is not None:
onFinish(alg, SilentProgress())
progress.close()
def error(msg):
QApplication.restoreOverrideCursor()
print msg
ProcessingLog.addToLog(ProcessingLog.LOG_ERROR, msg)
def cancel():
try:
algEx.finished.disconnect()
algEx.terminate()
QApplication.restoreOverrideCursor()
progress.close()
except:
pass
algEx.error.connect(error)
algEx.finished.connect(finish)
algEx.start()
algEx.wait()
else:
progress = SilentProgress()
ret = UnthreadedAlgorithmExecutor.runalg(alg, progress)
if onFinish is not None and ret:
onFinish(alg, progress)
QApplication.restoreOverrideCursor()
return alg
closed=[]
exp=QgsExpression("Type='Traffic Signs' and Status='Acknowledged'")
exp.prepare(scf.pendingFields())
for f in scf.getFeatures():
if exp.evaluate(f)==1:
closed.append(f.id())
scf.setSelectedFeatures(closed)
import processing
processing.alglist()
processing.alglist(“buffer”)
processing.alghelp("gdalogr:buffervectors")
processing.runalg("gdalogr:buffervectors",r'C:/Users/Paul/Desktop/Projected. shp',"geometry",100,False,None,False,"",r'C:/Users/Paul/Desktop/ProjectedBuffer.shp')
layer = iface.addVectorLayer(r'C:\Users\Paul\Desktop\ProjectedBuffer.shp', "Buffer", "ogr")
scfcity=City_or_Neighborhood
searchterm=Filter
progress.setInfo("Wait while I get data from the API")
progress.setText("Calling API")
if searchterm=="None":
pagesURL="http://seeclickfix.com/api/v2/issues?per_page=100&place_url="+scf city+"&page="
url="http://seeclickfix.com/api/v2/issues?per_page=100&place_url="+scfcity
else:
pagesURL="http://seeclickfix.com/api/v2/issuesper_page=100&place_url="+scfc ity+"&search="+searchterm+"&page="
def runAlgorithm(algOrName, onFinish, *args, **kwargs):
if isinstance(algOrName, GeoAlgorithm):
alg = algOrName
else:
alg = Processing.getAlgorithm(algOrName)
if alg is None:
# fix_print_with_import
print("Error: Algorithm not found\n")
QgsMessageLog.logMessage(
Processing.tr("Error: Algorithm {0} not found\n").format(algOrName), Processing.tr("Processing")
)
return
alg = alg.getCopy()
if len(args) == 1 and isinstance(args[0], dict):
# Set params by name and try to run the alg even if not all parameter values are provided,
# by using the default values instead.
setParams = []
for (name, value) in list(args[0].items()):
param = alg.getParameterFromName(name)
if param and param.setValue(value):
setParams.append(name)
continue
output = alg.getOutputFromName(name)
if output and output.setValue(value):
continue
# fix_print_with_import
print("Error: Wrong parameter value %s for parameter %s." % (value, name))
QgsMessageLog.logMessage(
Processing.tr("Error: Wrong parameter value {0} for parameter {1}.").format(value, name),
Processing.tr("Processing"),
)
ProcessingLog.addToLog(
ProcessingLog.LOG_ERROR,
Processing.tr("Error in %s. Wrong parameter value %s for parameter %s.") % (alg.name, value, name),
)
return
# fill any missing parameters with default values if allowed
for param in alg.parameters:
if param.name not in setParams:
if not param.setDefaultValue():
# fix_print_with_import
print("Error: Missing parameter value for parameter %s." % param.name)
QgsMessageLog.logMessage(
Processing.tr("Error: Missing parameter value for parameter {0}.").format(param.name),
Processing.tr("Processing"),
)
ProcessingLog.addToLog(
ProcessingLog.LOG_ERROR,
Processing.tr("Error in %s. Missing parameter value for parameter %s.")
% (alg.name, param.name),
)
return
else:
if len(args) != alg.getVisibleParametersCount() + alg.getVisibleOutputsCount():
# fix_print_with_import
print("Error: Wrong number of parameters")
QgsMessageLog.logMessage(
Processing.tr("Error: Wrong number of parameters"), Processing.tr("Processing")
)
processing.alghelp(algOrName)
return
i = 0
for param in alg.parameters:
if not param.hidden:
if not param.setValue(args[i]):
# fix_print_with_import
print("Error: Wrong parameter value: " + str(args[i]))
QgsMessageLog.logMessage(
Processing.tr("Error: Wrong parameter value: ") + str(args[i]), Processing.tr("Processing")
)
return
i = i + 1
for output in alg.outputs:
if not output.hidden:
if not output.setValue(args[i]):
# fix_print_with_import
print("Error: Wrong output value: " + str(args[i]))
QgsMessageLog.logMessage(
Processing.tr("Error: Wrong output value: ") + str(args[i]), Processing.tr("Processing")
)
return
i = i + 1
msg = alg._checkParameterValuesBeforeExecuting()
if msg:
# fix_print_with_import
print("Unable to execute algorithm\n" + str(msg))
QgsMessageLog.logMessage(
Processing.tr("Unable to execute algorithm\n{0}").format(msg), Processing.tr("Processing")
)
return
if not alg.checkInputCRS():
print("Warning: Not all input layers use the same CRS.\n" + "This can cause unexpected results.")
QgsMessageLog.logMessage(
Processing.tr("Warning: Not all input layers use the same CRS.\nThis can cause unexpected results."),
Processing.tr("Processing"),
)
# Don't set the wait cursor twice, because then when you
# restore it, it will still be a wait cursor.
overrideCursor = False
if iface is not None:
cursor = QApplication.overrideCursor()
if cursor is None or cursor == 0:
QApplication.setOverrideCursor(QCursor(Qt.WaitCursor))
overrideCursor = True
elif cursor.shape() != Qt.WaitCursor:
QApplication.setOverrideCursor(QCursor(Qt.WaitCursor))
overrideCursor = True
progress = None
if kwargs is not None and "progress" in list(kwargs.keys()):
progress = kwargs["progress"]
elif iface is not None:
progress = MessageBarProgress(alg.name)
ret = runalg(alg, progress)
if ret:
if onFinish is not None:
onFinish(alg, progress)
else:
QgsMessageLog.logMessage(
Processing.tr("There were errors executing the algorithm."), Processing.tr("Processing")
)
if overrideCursor:
QApplication.restoreOverrideCursor()
if isinstance(progress, MessageBarProgress):
progress.close()
return alg
def shp2json(self, BoundaryFile, BoundaryQuery, PopulationFile, datafile,
OutputFileName):
exp = BoundaryQuery
# print exp
fileShape = BoundaryFile
fileInfoShape = QFileInfo(fileShape)
fileShapeName = fileInfoShape.fileName()
layer = iface.addVectorLayer(fileShape, fileShapeName, "ogr")
if layer.isValid():
subset = exp
layer.setSubsetString(subset)
fileCSV = PopulationFile
fileInfoCSV = QFileInfo(fileCSV)
fileNm = fileInfoCSV.fileName()
if fileCSV == "":
return
uri = "file:" + fileCSV + "?delimiter=%s" % (";")
# print uri
cvslayer = iface.addVectorLayer(uri, fileNm, "delimitedtext")
if cvslayer.isValid():
subset = exp
cvslayer.setSubsetString(subset)
joinInfo = QgsVectorJoinInfo()
joinInfo.targetFieldName = 'name'
joinInfo.joinFieldName = 'District'
joinInfo.memoryCache = True
joinInfo.joinLayerId = cvslayer.id()
# print joinInfo.joinLayerId
layer.addJoin(joinInfo)
# iface.addVectorLayer(layer)
fileGeoJsonInfo = QFileInfo(OutputFileName)
fileGeoJsonDir = OutputFileName[:len(OutputFileName) -
len(fileGeoJsonInfo.fileName())]
fileGeoJson = fileGeoJsonDir + fileNm[:len(fileNm) - 4] + ".geojson"
if fileGeoJson == "":
return
qgis.core.QgsVectorFileWriter.writeAsVectorFormat(
layer, fileGeoJson, 'utf-8', layer.crs(), 'GeoJson')
# fileCSV=PopulationFile
# fileInfoCSV=QFileInfo(fileCSV)
# fileNm=fileInfoCSV.fileName()
## iface.addVectorLayer(layer)
# fileGeoJson= fileGeoJsonDir+fileNm[:len(fileNm)-4]+".geojson"
# if fileGeoJson=="":
# return
# fileGeoJsonInfo=QFileInfo(fileGeoJson)
# qgis.core.QgsVectorFileWriter.writeAsVectorFormat(layer, fileGeoJson, 'utf-8', layer.crs(), 'GeoJson')
print "Made geojson File1"
firstRes = QgsVectorLayer(fileGeoJson, fileGeoJsonInfo.fileName(),
"ogr")
if not firstRes.isValid():
return
xMax = firstRes.extent().xMaximum() + firstRes.extent().width() * 0.05
xMin = firstRes.extent().xMinimum() - firstRes.extent().width() * 0.05
yMax = firstRes.extent().yMaximum() + firstRes.extent().width() * 0.05
yMin = firstRes.extent().yMinimum() - firstRes.extent().width() * 0.05
rect = QgsRectangle(xMin, yMin, xMax, yMax)
maskLayer = QgsVectorLayer("Polygon", "mask", "memory")
QgsMapLayerRegistry.instance().addMapLayer(maskLayer)
feature = QgsFeature()
feature.setGeometry(QgsGeometry.fromRect(rect))
maskLayer.startEditing()
maskLayer.addFeature(feature)
maskLayer.commitChanges()
fileCSV1 = datafile
fileInfoCSV1 = QFileInfo(fileCSV1)
# print fileCSV1
if fileCSV1 == "":
return
uri1 = "file:" + fileCSV1 + "?delimiter=%s&xField=%s&yField=%s" % (
",", "LNG", "LAT")
cvslayer1 = iface.addVectorLayer(uri1, fileInfoCSV1.fileName(),
"delimitedtext")
# print cvslayer1.featureCount()
filePath1 = OutputFileName
if filePath1 == "":
return
filePathInfo = QFileInfo(filePath1)
# print filePath1
sPath = filePathInfo.filePath()
sName = filePathInfo.fileName()
a = len(sPath) - len(sName)
b = len(sName) - 8
s1 = sPath[:a]
clippedPath = s1 + sName[:b] + "_Clipped.shp"
clippedName = sName[:b] + "_Clipped.shp"
# print clippedPath
print "Start Clipping"
processing.runalg("qgis:clip", cvslayer1, maskLayer, clippedPath)
print "End Clipping"
#
voronoiPath = s1 + sName[:b] + "_Voronoi.shp"
voronoiName = sName[:b] + "_Voronoi.shp"
clippedLayer = QgsVectorLayer(clippedPath, clippedName, "ogr")
print "Start the voronoi polygons"
processing.runalg("qgis:voronoipolygons", clippedLayer, voronoiPath)
print "End the voronoi polygons"
voronoiLayer = QgsVectorLayer(voronoiPath, voronoiName, "ogr")
res = voronoiLayer.dataProvider().addAttributes(
[QgsField("category", QVariant.String)])
if res == "False":
return
voronoiLayer1 = QgsVectorLayer(voronoiPath, voronoiName, "ogr")
iter = voronoiLayer1.getFeatures()
dissolveFieldName0 = fileInfoCSV1.fileName()
dissolveFieldNameLen = len(dissolveFieldName0) - 4
dissolveFieldName = dissolveFieldName0[:dissolveFieldNameLen]
print dissolveFieldName
dissolveFieldOutputName = "category"
idx1 = voronoiLayer1.fieldNameIndex(dissolveFieldName)
idx2 = voronoiLayer1.fieldNameIndex(dissolveFieldOutputName)
print idx1, idx2
maxValue = -999999999999
minValue = 999999999999
# print str(minValue)
for feature in iter:
value1 = feature.attributes()[idx1]
if value1 != NULL:
maxValue = max(maxValue, value1)
minValue = min(minValue, value1)
stage = (maxValue - minValue) / 5
a1 = minValue
a2 = a1 + stage
a3 = a2 + stage
a4 = a3 + stage
a5 = a4 + stage
a6 = maxValue
count = 0
iter1 = voronoiLayer1.getFeatures()
# print voronoiLayer1.featureCount()
# print str(stage),a6
# proper=QVariant.String
progressMessageBar = iface.messageBar().createMessage(
"Adding the value in category filed...")
progress = QProgressBar()
progress.setMaximum(voronoiLayer1.featureCount())
progress.setAlignment(Qt.AlignLeft | Qt.AlignVCenter)
progressMessageBar.layout().addWidget(progress)
iface.messageBar().pushWidget(progressMessageBar,
iface.messageBar().INFO)
voronoiLayer1.startEditing()
for feature1 in iter1:
value1 = feature1.attributes()[idx1]
if a1 <= value1 < a2:
proper = str(a1) + "-" + str(a2)
elif a2 <= value1 < a3:
proper = str(a2) + "-" + str(a3)
elif a3 <= value1 < a4:
proper = str(a3) + "-" + str(a4)
elif a4 <= value1 < a5:
proper = str(a4) + "-" + str(a5)
elif a5 <= value1 <= a6:
proper = str(a5) + "-" + str(a6)
else:
proper = ""
voronoiLayer1.changeAttributeValue(count, idx2, proper)
count += 1
progress.setValue(count)
# print "count:", count
iface.messageBar().clearWidgets()
voronoiLayer1.commitChanges()
voronoiLayer2 = QgsVectorLayer(voronoiPath, voronoiName, "ogr")
dissolvePath = s1 + sName[:b] + "_Dissolve.shp"
dissolveName = sName[:b] + "_Dissolve.shp"
# print dissolvePath
processing.alglist("Dissolve")
processing.alghelp("qgis:dissolve")
print "Start Dissolving"
processing.runalg("qgis:dissolve", voronoiLayer2, False, "category",
dissolvePath)
print "End Dissolving"
dissolveLayer = QgsVectorLayer(dissolvePath, dissolveName, "ogr")
fInfo = QFileInfo(dissolvePath)
resultClipName = fInfo.fileName()
resultClipPath = dissolvePath[:len(dissolvePath) - len(resultClipName)]
resultClipName = resultClipName[:len(resultClipName) - 4] + "Clip.shp"
resultClipPath = resultClipPath + resultClipName
print "Start Clipping"
processing.runalg("qgis:clip", dissolveLayer, firstRes, resultClipPath)
print "End Clipping"
endLayer = QgsVectorLayer(resultClipPath, resultClipName, "ogr")
fileGeoJson1 = OutputFileName
if fileGeoJson1 == "":
return
fileGeoJsonInfo1 = QFileInfo(fileGeoJson1)
qgis.core.QgsVectorFileWriter.writeAsVectorFormat(
endLayer, fileGeoJson1, 'utf-8', endLayer.crs(), 'GeoJson')
print "Made geojson File2"
# jsonLayer1 = iface.addVectorLayer(fileGeoJson, fileGeoJsonInfo.fileName(), "ogr")
jsonLayer2 = iface.addVectorLayer(fileGeoJson1,
fileGeoJsonInfo1.fileName(), "ogr")
def runAlgorithm(algOrName, onFinish, *args):
if isinstance(algOrName, GeoAlgorithm):
alg = algOrName
else:
alg = Processing.getAlgorithm(algOrName)
if alg is None:
print 'Error: Algorithm not found\n'
return
alg = alg.getCopy()
if len(args) == 1 and isinstance(args[0], dict):
# Set params by name and try to run the alg even if not all parameter values are provided,
# by using the default values instead.
setParams = []
for (name, value) in args[0].items():
param = alg.getParameterFromName(name)
if param and param.setValue(value):
setParams.append(name)
continue
output = alg.getOutputFromName(name)
if output and output.setValue(value):
continue
print 'Error: Wrong parameter value %s for parameter %s.' \
% (value, name)
ProcessingLog.addToLog(ProcessingLog.LOG_ERROR,
Processing.tr('Error in %s. Wrong parameter value %s for parameter %s.') \
% (alg.name, value, name))
return
# fill any missing parameters with default values if allowed
for param in alg.parameters:
if param.name not in setParams:
if not param.setValue(None):
print ('Error: Missing parameter value for parameter %s.' % (param.name))
ProcessingLog.addToLog(ProcessingLog.LOG_ERROR,
Processing.tr('Error in %s. Missing parameter value for parameter %s.') \
% (alg.name, param.name))
return
else:
if len(args) != alg.getVisibleParametersCount() \
+ alg.getVisibleOutputsCount():
print 'Error: Wrong number of parameters'
processing.alghelp(algOrName)
return
i = 0
for param in alg.parameters:
if not param.hidden:
if not param.setValue(args[i]):
print 'Error: Wrong parameter value: ' \
+ unicode(args[i])
return
i = i + 1
for output in alg.outputs:
if not output.hidden:
if not output.setValue(args[i]):
print 'Error: Wrong output value: ' + unicode(args[i])
return
i = i + 1
msg = alg.checkParameterValuesBeforeExecuting()
if msg:
print 'Unable to execute algorithm\n' + msg
return
if not alg.checkInputCRS():
print 'Warning: Not all input layers use the same CRS.\n' \
+ 'This can cause unexpected results.'
if iface is not None:
# Don't set the wait cursor twice, because then when you
# restore it, it will still be a wait cursor.
cursor = QApplication.overrideCursor()
if cursor is None or cursor == 0:
QApplication.setOverrideCursor(QCursor(Qt.WaitCursor))
elif cursor.shape() != Qt.WaitCursor:
QApplication.setOverrideCursor(QCursor(Qt.WaitCursor))
progress = None
if iface is not None :
progress = MessageBarProgress()
ret = runalg(alg, progress)
if onFinish is not None and ret:
onFinish(alg, progress)
if iface is not None:
QApplication.restoreOverrideCursor()
progress.close()
return alg
# -*- coding: utf-8 -*-
#importar las funciones del procesamiento
import processing
#ahora necesitamos saber el algoritmo a usar
#para ello usamos el método alglist()
#si introduces alglist() te salen todos los métodos pero
#si pones entre los paréwntesis algún nombre, te hace el filtro
processing.alglist('difference')
processing.alghelp('qgis:difference')
#capas de entrada
layer_ciudades =r'E:\CURSO_PYQGIS\CAPAS\ciudades.shp'
layer_z_estudio = r'E:\CURSO_PYQGIS\CAPAS\zona_estudio.shp'
layer_ciudades_fuera = r'E:\CURSO_PYQGIS\CAPAS_PROCESADAS\ciudades_fuera.shp'
#proceso:
processing.runalg('qgis:difference',layer_ciudades,layer_z_estudio,True,layer_ciudades_fuera)
#carga capa a la TOC:
layer_ciudades_fuera = QgsVectorLayer(r'E:\CURSO_PYQGIS\CAPAS_PROCESADAS\ciudades_fuera.shp', 'layer_ciudades_fuera', 'ogr')
QgsMapLayerRegistry.instance().addMapLayer(layer_ciudades_fuera)
def runAlgorithm(algOrName, onFinish, *args, **kwargs):
if isinstance(algOrName, GeoAlgorithm):
alg = algOrName
else:
alg = Processing.getAlgorithm(algOrName)
if alg is None:
# fix_print_with_import
print('Error: Algorithm not found\n')
QgsMessageLog.logMessage(
Processing.tr('Error: Algorithm {0} not found\n').format(
algOrName), Processing.tr("Processing"))
return
alg = alg.getCopy()
if len(args) == 1 and isinstance(args[0], dict):
# Set params by name and try to run the alg even if not all parameter values are provided,
# by using the default values instead.
setParams = []
for (name, value) in args[0].items():
param = alg.getParameterFromName(name)
if param and param.setValue(value):
setParams.append(name)
continue
output = alg.getOutputFromName(name)
if output and output.setValue(value):
continue
# fix_print_with_import
print('Error: Wrong parameter value %s for parameter %s.' %
(value, name))
QgsMessageLog.logMessage(
Processing.tr(
'Error: Wrong parameter value {0} for parameter {1}.').
format(value, name), Processing.tr("Processing"))
ProcessingLog.addToLog(
ProcessingLog.LOG_ERROR,
Processing.
tr('Error in %s. Wrong parameter value %s for parameter %s.'
) % (alg.name, value, name))
return
# fill any missing parameters with default values if allowed
for param in alg.parameters:
if param.name not in setParams:
if not param.setDefaultValue():
# fix_print_with_import
print(
'Error: Missing parameter value for parameter %s.'
% param.name)
QgsMessageLog.logMessage(
Processing.
tr('Error: Missing parameter value for parameter {0}.'
).format(param.name),
Processing.tr("Processing"))
ProcessingLog.addToLog(
ProcessingLog.LOG_ERROR,
Processing.
tr('Error in %s. Missing parameter value for parameter %s.'
) % (alg.name, param.name))
return
else:
if len(args) != alg.getVisibleParametersCount(
) + alg.getVisibleOutputsCount():
# fix_print_with_import
print('Error: Wrong number of parameters')
QgsMessageLog.logMessage(
Processing.tr('Error: Wrong number of parameters'),
Processing.tr("Processing"))
processing.alghelp(algOrName)
return
i = 0
for param in alg.parameters:
if not param.hidden:
if not param.setValue(args[i]):
# fix_print_with_import
print('Error: Wrong parameter value: ' +
unicode(args[i]))
QgsMessageLog.logMessage(
Processing.tr('Error: Wrong parameter value: ') +
unicode(args[i]), Processing.tr("Processing"))
return
i = i + 1
for output in alg.outputs:
if not output.hidden:
if not output.setValue(args[i]):
# fix_print_with_import
print('Error: Wrong output value: ' + unicode(args[i]))
QgsMessageLog.logMessage(
Processing.tr('Error: Wrong output value: ') +
unicode(args[i]), Processing.tr("Processing"))
return
i = i + 1
msg = alg._checkParameterValuesBeforeExecuting()
if msg:
# fix_print_with_import
print('Unable to execute algorithm\n' + unicode(msg))
QgsMessageLog.logMessage(
Processing.tr('Unable to execute algorithm\n{0}').format(msg),
Processing.tr("Processing"))
return
if not alg.checkInputCRS():
print('Warning: Not all input layers use the same CRS.\n' +
'This can cause unexpected results.')
QgsMessageLog.logMessage(
Processing.
tr('Warning: Not all input layers use the same CRS.\nThis can cause unexpected results.'
), Processing.tr("Processing"))
# Don't set the wait cursor twice, because then when you
# restore it, it will still be a wait cursor.
overrideCursor = False
if iface is not None:
cursor = QApplication.overrideCursor()
if cursor is None or cursor == 0:
QApplication.setOverrideCursor(QCursor(Qt.WaitCursor))
overrideCursor = True
elif cursor.shape() != Qt.WaitCursor:
QApplication.setOverrideCursor(QCursor(Qt.WaitCursor))
overrideCursor = True
progress = None
if kwargs is not None and "progress" in kwargs.keys():
progress = kwargs["progress"]
elif iface is not None:
progress = MessageBarProgress(alg.name)
ret = runalg(alg, progress)
if ret:
if onFinish is not None:
onFinish(alg, progress)
else:
QgsMessageLog.logMessage(
Processing.tr("There were errors executing the algorithm."),
Processing.tr("Processing"))
if overrideCursor:
QApplication.restoreOverrideCursor()
if isinstance(progress, MessageBarProgress):
progress.close()
return alg
from timeit import default_timer as timer
import errno
def make_sure_path_exists(path):
try:
os.makedirs(path)
except OSError as exception:
if exception.errno != errno.EEXIST:
raise
# Debug model info
print "### model.py ### Algorithm help and options for model"
qgis_model_name = "modeler:example_analysis_linux_v3.2"
processing.alghelp(qgis_model_name)
processing.algoptions(qgis_model_name)
print QgsApplication.showSettings()
print "### model.py ### QGIS model prepared, logging to file %s" % filename
# Run model
inputimage_pre = os.path.join(os.environ['QGIS_WORKSPACE'],
"data/pre_conflict.tif")
inputimage_post = os.path.join(os.environ['QGIS_WORKSPACE'],
"data/post_conflict.tif")
output_directory = os.path.join(
os.environ['QGIS_RESULT'],
datetime.datetime.now().strftime("%Y%m%d-%H%M%S"))
make_sure_path_exists(output_directory)