def processAlgorithm(self, progress):
apik = apikey(False)
if apik is None:
raise GeoAlgorithmExecutionException("what3words API key is not defined")
w3w = what3words(apikey=apik)
filename = self.getParameterValue(self.INPUT)
layer = dataobjects.getObjectFromUri(filename)
vprovider = layer.dataProvider()
fields = vprovider.fields()
caps = layer.dataProvider().capabilities()
if not (caps & QgsVectorDataProvider.AddAttributes):
raise GeoAlgorithmExecutionException("The selected layer does not support adding new attributes.")
idxField = fields.indexFromName("3WordAddr")
if idxField == -1:
vprovider.addAttributes([QgsField("3WordAddr", QVariant.String)])
layer.updateFields()
idxField = len(fields)
nFeat = layer.featureCount()
epsg4326 = QgsCoordinateReferenceSystem("EPSG:4326")
transform = QgsCoordinateTransform(layer.crs(), epsg4326)
for i, feat in enumerate(layer.getFeatures()):
progress.setPercentage(int(100 * i / nFeat))
pt = feat.geometry().vertexAt(0)
try:
pt4326 = transform.transform(pt.x(), pt.y())
threeWords = ".".join(w3w.getWords(pt4326.y(), pt4326.x())["words"])
except Exception,e :
threeWords = ""
layer.dataProvider().changeAttributeValues({feat.id() : {idxField: threeWords}})
def processAlgorithm(self, parameters, context, feedback):
source = self.parameterAsSource(parameters, self.INPUT, context)
fields = source.fields()
field = QgsField("w3w", QVariant.String)
fields.append(field)
apiKey = pluginSetting("apiKey")
w3w = what3words(apikey=apiKey)
(sink, dest_id) = self.parameterAsSink(parameters,
self.OUTPUT, context, fields,
source.wkbType(),
source.sourceCrs())
features = source.getFeatures()
total = 100.0 / source.featureCount() if source.featureCount() else 0
epsg4326 = QgsCoordinateReferenceSystem('EPSG:4326')
transform = QgsCoordinateTransform(source.sourceCrs(), epsg4326,
QgsProject.instance())
for current, feat in enumerate(features):
if feedback.isCanceled():
break
feedback.setProgress(int(current * total))
attrs = feat.attributes()
pt = feat.geometry().centroid().asPoint()
try:
pt4326 = transform.transform(pt.x(), pt.y())
threeWords = w3w.reverseGeocode(pt4326.y(),
pt4326.x())["words"]
except Exception as e:
progress.setDebugInfo(
"Failed to retrieve w3w address for feature {}:\n{}".
format(feat.id(), str(e)))
threeWords = ""
attrs.append(threeWords)
feat.setAttributes(attrs)
sink.addFeature(feat, QgsFeatureSink.FastInsert)
return {self.OUTPUT: dest_id}
def processAlgorithm(self, progress):
apik = pluginSetting("apiKey")
if apik is None or apik == ""::
raise GeoAlgorithmExecutionException("what3words API key is not defined")
filename = self.getParameterValue(self.INPUT)
layer = dataobjects.getObjectFromUri(filename)
provider = layer.dataProvider()
caps = provider.capabilities()
if not (caps & QgsVectorDataProvider.AddAttributes):
raise GeoAlgorithmExecutionException("The selected layer does not support adding new attributes.")
idxField = layer.fieldNameIndex("3WordAddr")
if idxField == -1:
provider.addAttributes([QgsField("3WordAddr", QVariant.String, "", 254, 0)])
layer.updateFields()
idxField = layer.fieldNameIndex("3WordAddr")
w3w = what3words(apikey=apik)
nFeat = layer.featureCount()
epsg4326 = QgsCoordinateReferenceSystem("EPSG:4326")
transform = QgsCoordinateTransform(layer.crs(), epsg4326)
for i, feat in enumerate(layer.getFeatures()):
progress.setPercentage(int(100 * i / nFeat))
pt = feat.geometry().vertexAt(0)
try:
pt4326 = transform.transform(pt.x(), pt.y())
threeWords = w3w.reverseGeocode(pt4326.y(), pt4326.x())["words"]
except Exception as e:
progress.setDebugInfo("Failed to retrieve w3w address for feature {}:\n{}".format(feat.id(), str(e)))
threeWords = ""
provider.changeAttributeValues({feat.id() : {idxField: threeWords}})
self.setOutputValue(self.OUTPUT, filename)
def processAlgorithm(self, progress):
apik = apikey(False)
if apik is None:
raise GeoAlgorithmExecutionException(
"what3words API key is not defined")
w3w = what3words(apikey=apik)
filename = self.getParameterValue(self.INPUT)
layer = dataobjects.getObjectFromUri(filename)
vprovider = layer.dataProvider()
fields = vprovider.fields()
caps = layer.dataProvider().capabilities()
if not (caps & QgsVectorDataProvider.AddAttributes):
raise GeoAlgorithmExecutionException(
"The selected layer does not support adding new attributes.")
idxField = fields.indexFromName("3WordAddr")
if idxField == -1:
vprovider.addAttributes([QgsField("3WordAddr", QVariant.String)])
layer.updateFields()
idxField = len(fields)
nFeat = layer.featureCount()
epsg4326 = QgsCoordinateReferenceSystem("EPSG:4326")
transform = QgsCoordinateTransform(layer.crs(), epsg4326)
for i, feat in enumerate(layer.getFeatures()):
progress.setPercentage(int(100 * i / nFeat))
pt = feat.geometry().vertexAt(0)
try:
pt4326 = transform.transform(pt.x(), pt.y())
threeWords = ".".join(
w3w.getWords(pt4326.y(), pt4326.x())["words"])
except Exception, e:
threeWords = ""
layer.dataProvider().changeAttributeValues(
{feat.id(): {
idxField: threeWords
}})
def __init__(self, canvas):
QgsMapTool.__init__(self, canvas)
self.setCursor(Qt.CrossCursor)
apiKey = pluginSetting("apiKey")
self.w3w = what3words(apikey=apiKey)
def setApiKey(self, apikey):
self.w3w = what3words(apikey=apikey)
class Add3WordsFieldAlgorithm(GeoAlgorithm):
'''
An algorithm that takes a points layer and oututs the same layer but with
an additional field containing w3w adresses of points in the input layer.
'''
INPUT = 'INPUT'
OUTPUT = 'OUTPUT'
def processAlgorithm(self, progress):
'''
Here is where the algorithm functionality takes places. This method is
called when the algorithm is executed'''
apik = pluginSetting("apiKey")
if apik is None or apik == ""::
'''
When there is a problem in a Processing algorithm, a
GeoAlgorithmExecutionException should be raised.
'''
raise GeoAlgorithmExecutionException("what3words API key is not defined")
'''
Get value selected by user. It will always be a string with the path
to the layer source.
'''
filename = self.getParameterValue(self.INPUT)
'''Convert it to a QGIS layer object'''
layer = dataobjects.getObjectFromUri(filename)
'''Some checking'''
provider = layer.dataProvider()
caps = provider.capabilities()
if not (caps & QgsVectorDataProvider.AddAttributes):
raise GeoAlgorithmExecutionException("The selected layer does not support adding new attributes.")
'''
Check if there is a field named '3WordAddr'. If it exists already,
we will overwrite its content. Otherwise, we create a new one.
'''
idxField = layer.fieldNameIndex("3WordAddr")
if idxField == -1:
provider.addAttributes([QgsField("3WordAddr", QVariant.String, "", 254, 0)])
layer.updateFields()
idxField = layer.fieldNameIndex("3WordAddr")
w3w = what3words(apikey=apik)
nFeat = layer.featureCount()
epsg4326 = QgsCoordinateReferenceSystem("EPSG:4326")
'''
We use this object to convert point coords from the layer CRS into
EPSG:4326, which is needed to call the w3w service
'''
transform = QgsCoordinateTransform(layer.crs(), epsg4326)
'''Iterate over features'''
for i, feat in enumerate(layer.getFeatures()):
progress.setPercentage(int(100 * i / nFeat))
'''Get Coordinate in layer CRS'''
pt = feat.geometry().vertexAt(0)
try:
'''Convert to 4326'''
pt4326 = transform.transform(pt.x(), pt.y())
'''Convert 4326 coord into w3w address'''
threeWords = w3w.reverseGeocode(pt4326.y(), pt4326.x())["words"]
except Exception as e:
progress.setDebugInfo("Failed to retrieve w3w address for feature {}:\n{}".format(feat.id(), str(e)))
threeWords = ""
provider.changeAttributeValues({feat.id() : {idxField: threeWords}})
self.setOutputValue(self.OUTPUT, filename)
