本文整理汇总了Python中qgis.PyQt.QtCore.QVariant.Double方法的典型用法代码示例。如果您正苦于以下问题:Python QVariant.Double方法的具体用法?Python QVariant.Double怎么用?Python QVariant.Double使用的例子?那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类qgis.PyQt.QtCore.QVariant
的用法示例。
在下文中一共展示了QVariant.Double方法的15个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: buildQgsVectorLayer
# 需要导入模块: from qgis.PyQt.QtCore import QVariant [as 别名]
# 或者: from qgis.PyQt.QtCore.QVariant import Double [as 别名]
def buildQgsVectorLayer(string_geomtype, string_layername, crs, feature_list, list_qgsfield):
#create new vector layer from self.crs
vector_layer = QgsVectorLayer(string_geomtype, string_layername, "memory")
#set crs from class
vector_layer.setCrs(crs)
#set fields
provider = vector_layer.dataProvider()
provider.addAttributes(list_qgsfield) #[QgsField('fid',QVariant.Int),QgsField("origin_point_id", QVariant.Double),QgsField("iso", QVariant.Int)]
vector_layer.updateFields()
#fill layer with geom and attrs
vector_layer.startEditing()
for feat in feature_list:
vector_layer.addFeature(feat, True)
vector_layer.commitChanges()
return vector_layer
示例2: addpoint
# 需要导入模块: from qgis.PyQt.QtCore import QVariant [as 别名]
# 或者: from qgis.PyQt.QtCore.QVariant import Double [as 别名]
def addpoint(self, feature):
if self.cntPt == 0:
f = QgsFields()
f.append(QgsField("name", QVariant.String))
f.append(QgsField("folders", QVariant.String))
f.append(QgsField("description", QVariant.String))
f.append(QgsField("altitude", QVariant.Double))
f.append(QgsField("alt_mode", QVariant.String))
f.append(QgsField("time_begin", QVariant.String))
f.append(QgsField("time_end", QVariant.String))
f.append(QgsField("time_when", QVariant.String))
for item in self.extData:
f.append(QgsField(item, QVariant.String))
(self.sinkPt, self.dest_id_pt) = self.parameterAsSink(
self.parameters,
self.PrmPointOutputLayer, self.context, f,
QgsWkbTypes.PointZ, epsg4326)
self.cntPt += 1
self.sinkPt.addFeature(feature)
示例3: addline
# 需要导入模块: from qgis.PyQt.QtCore import QVariant [as 别名]
# 或者: from qgis.PyQt.QtCore.QVariant import Double [as 别名]
def addline(self, feature):
if self.cntLine == 0:
f = QgsFields()
f.append(QgsField("name", QVariant.String))
f.append(QgsField("folders", QVariant.String))
f.append(QgsField("description", QVariant.String))
f.append(QgsField("altitude", QVariant.Double))
f.append(QgsField("alt_mode", QVariant.String))
f.append(QgsField("time_begin", QVariant.String))
f.append(QgsField("time_end", QVariant.String))
f.append(QgsField("time_when", QVariant.String))
for item in self.extData:
f.append(QgsField(item, QVariant.String))
(self.sinkLine, self.dest_id_line) = self.parameterAsSink(
self.parameters,
self.PrmLineOutputLayer, self.context, f,
QgsWkbTypes.MultiLineStringZ, epsg4326)
self.cntLine += 1
self.sinkLine.addFeature(feature)
示例4: addpolygon
# 需要导入模块: from qgis.PyQt.QtCore import QVariant [as 别名]
# 或者: from qgis.PyQt.QtCore.QVariant import Double [as 别名]
def addpolygon(self, feature):
if self.cntPoly == 0:
f = QgsFields()
f.append(QgsField("name", QVariant.String))
f.append(QgsField("folders", QVariant.String))
f.append(QgsField("description", QVariant.String))
f.append(QgsField("altitude", QVariant.Double))
f.append(QgsField("alt_mode", QVariant.String))
f.append(QgsField("time_begin", QVariant.String))
f.append(QgsField("time_end", QVariant.String))
f.append(QgsField("time_when", QVariant.String))
for item in self.extData:
f.append(QgsField(item, QVariant.String))
(self.sinkPoly, self.dest_id_poly) = self.parameterAsSink(
self.parameters,
self.PrmPolygonOutputLayer, self.context, f,
QgsWkbTypes.MultiPolygonZ, epsg4326)
self.cntPoly += 1
self.sinkPoly.addFeature(feature)
示例5: createLayer
# 需要导入模块: from qgis.PyQt.QtCore import QVariant [as 别名]
# 或者: from qgis.PyQt.QtCore.QVariant import Double [as 别名]
def createLayer(self):
'''Create a memory layer from the zoom to locations'''
rowcnt = self.resultsTable.rowCount()
if rowcnt == 0:
return
attr = []
for item, label in enumerate(LABELS[0:self.numCol]):
label = label.lower()
if item <= 1:
attr.append(QgsField(label, QVariant.Double))
else:
attr.append(QgsField(label, QVariant.String))
ptLayer = QgsVectorLayer("Point?crs=epsg:4326", u"Lat Lon Locations", "memory")
provider = ptLayer.dataProvider()
provider.addAttributes(attr)
ptLayer.updateFields()
for id in range(rowcnt):
item = self.resultsTable.item(id, 0).data(Qt.UserRole)
feature = QgsFeature()
feature.setGeometry(QgsGeometry.fromPointXY(QgsPointXY(item.lon, item.lat)))
attr = [item.lat, item.lon, item.label]
for i in range(3, self.numCol):
attr.append(item.data[i - 3])
feature.setAttributes(attr)
provider.addFeatures([feature])
ptLayer.updateExtents()
if self.settings.multiZoomStyleID == 1:
settings = QgsPalLayerSettings()
settings.fieldName = 'label'
settings.placement = QgsPalLayerSettings.AroundPoint
labeling = QgsVectorLayerSimpleLabeling(settings)
ptLayer.setLabeling(labeling)
ptLayer.setLabelsEnabled(True)
elif self.settings.multiZoomStyleID == 2 and os.path.isfile(self.settings.customQMLFile()):
ptLayer.loadNamedStyle(self.settings.customQMLFile())
QgsProject.instance().addMapLayer(ptLayer)
示例6: getFieldDatatypeFromPythontype
# 需要导入模块: from qgis.PyQt.QtCore import QVariant [as 别名]
# 或者: from qgis.PyQt.QtCore.QVariant import Double [as 别名]
def getFieldDatatypeFromPythontype(pythonvar):
if isinstance(pythonvar, str):
return QVariant.String
elif isinstance(pythonvar, int):
return QVariant.Int
elif isinstance(pythonvar, float):
return QVariant.Double
else:
return QVariant.String
示例7: createMeasureColumn
# 需要导入模块: from qgis.PyQt.QtCore import QVariant [as 别名]
# 或者: from qgis.PyQt.QtCore.QVariant import Double [as 别名]
def createMeasureColumn(self, layer):
if layer.geometryType() == QgsWkbTypes.PolygonGeometry:
layer.addExpressionField('$area', QgsField(self.tr('area_otf'), QVariant.Double))
elif layer.geometryType() == QgsWkbTypes.LineGeometry:
layer.addExpressionField('$length', QgsField(self.tr('lenght_otf'), QVariant.Double))
return layer
示例8: processAlgorithm
# 需要导入模块: from qgis.PyQt.QtCore import QVariant [as 别名]
# 或者: from qgis.PyQt.QtCore.QVariant import Double [as 别名]
def processAlgorithm(self, parameters, context, feedback):
input_layer = self.parameterAsSource(parameters, self.INPUT, context)
traj_id_field = self.parameterAsFields(parameters, self.TRAJ_ID_FIELD, context)[0]
timestamp_field = self.parameterAsFields(parameters, self.TIMESTAMP_FIELD, context)[0]
timestamp_format = self.parameterAsString(parameters, self.TIMESTAMP_FORMAT, context)
fields = input_layer.fields()
output_fields = fields
output_fields.append(QgsField('meters_per_sec', QVariant.Double))
(sink, dest_id) = self.parameterAsSink(parameters, self.OUTPUT, context,
output_fields,
QgsWkbTypes.Point,
input_layer.sourceCrs())
trajectories = trajectories_from_qgis_point_layer(input_layer, timestamp_field, traj_id_field, timestamp_format)
for traj in trajectories:
traj.add_meters_per_sec()
for index, row in traj.df.iterrows():
pt = QgsGeometry.fromWkt(row['geometry'].wkt)
f = QgsFeature()
f.setGeometry(pt)
attributes = []
for field in fields:
if field.name() == timestamp_field:
attributes.append(str(index))
else:
attributes.append(row[field.name()])
f.setAttributes(attributes)
sink.addFeature(f, QgsFeatureSink.FastInsert)
# default return type for function
return {self.OUTPUT: dest_id}
示例9: processAlgorithm
# 需要导入模块: from qgis.PyQt.QtCore import QVariant [as 别名]
# 或者: from qgis.PyQt.QtCore.QVariant import Double [as 别名]
def processAlgorithm(self, parameters, context, feedback):
input_layer = self.parameterAsSource(parameters, self.INPUT, context)
traj_id_field = self.parameterAsFields(parameters, self.TRAJ_ID_FIELD, context)[0]
timestamp_field = self.parameterAsFields(parameters, self.TIMESTAMP_FIELD, context)[0]
timestamp_format = self.parameterAsString(parameters, self.TIMESTAMP_FORMAT, context)
fields = input_layer.fields()
output_fields = fields
output_fields.append(QgsField('heading', QVariant.Double))
(sink, dest_id) = self.parameterAsSink(parameters, self.OUTPUT, context,
output_fields,
QgsWkbTypes.Point,
input_layer.sourceCrs())
trajectories = trajectories_from_qgis_point_layer(input_layer, timestamp_field, traj_id_field, timestamp_format)
for traj in trajectories:
traj.add_heading()
for index, row in traj.df.iterrows():
pt = QgsGeometry.fromWkt(row['geometry'].wkt)
f = QgsFeature()
f.setGeometry(pt)
attributes = []
for field in fields:
if field.name() == timestamp_field:
attributes.append(str(index))
else:
attributes.append(row[field.name()])
f.setAttributes(attributes)
sink.addFeature(f, QgsFeatureSink.FastInsert)
# default return type for function
return {self.OUTPUT: dest_id}
示例10: update_field_receiver_points_layer
# 需要导入模块: from qgis.PyQt.QtCore import QVariant [as 别名]
# 或者: from qgis.PyQt.QtCore.QVariant import Double [as 别名]
def update_field_receiver_points_layer(self):
if str(self.receiver_points_layer_comboBox.currentText()) == "":
return
receiver_points_layer = QgsProject.instance().mapLayersByName(self.receiver_points_layer_comboBox.currentText())[0]
receiver_points_layer_fields = list(receiver_points_layer.dataProvider().fields())
#print(receiver_points_layer_fields)
#self.id_field_comboBox.clear()
self.level_1_comboBox.clear()
self.level_2_comboBox.clear()
self.level_3_comboBox.clear()
self.level_4_comboBox.clear()
self.level_5_comboBox.clear()
receiver_points_layer_fields_number = [""]
for f in receiver_points_layer_fields:
if f.type() == QVariant.Int or f.type() == QVariant.Double:
receiver_points_layer_fields_number.append(str(f.name()))
#print(receiver_points_layer_fields_number)
for f_label in receiver_points_layer_fields_number:
#self.id_field_comboBox.addItem(f_label)
self.level_1_comboBox.addItem(f_label)
self.level_2_comboBox.addItem(f_label)
self.level_3_comboBox.addItem(f_label)
self.level_4_comboBox.addItem(f_label)
self.level_5_comboBox.addItem(f_label)
示例11: calcIsoContours
# 需要导入模块: from qgis.PyQt.QtCore import QVariant [as 别名]
# 或者: from qgis.PyQt.QtCore.QVariant import Double [as 别名]
def calcIsoContours(self, max_dist, interval, interpolation_raster_path):
featurelist = []
try:
import matplotlib.pyplot as plt
except:
return featurelist
ds_in = gdal.Open(interpolation_raster_path)
band_in = ds_in.GetRasterBand(1)
xsize_in = band_in.XSize
ysize_in = band_in.YSize
geotransform_in = ds_in.GetGeoTransform()
srs = osr.SpatialReference()
srs.ImportFromWkt( ds_in.GetProjectionRef() )
raster_values = band_in.ReadAsArray(0, 0, xsize_in, ysize_in)
raster_values[raster_values < 0] = max_dist + 1000 #necessary to produce rectangular array from raster
#nodata values get replaced by the maximum value + 1
x_pos = linspace(geotransform_in[0], geotransform_in[0] + geotransform_in[1] * raster_values.shape[1], raster_values.shape[1])
y_pos = linspace(geotransform_in[3], geotransform_in[3] + geotransform_in[5] * raster_values.shape[0], raster_values.shape[0])
x_grid, y_grid = meshgrid(x_pos, y_pos)
start = interval
end = interval * ceil(max_dist/interval) +interval
levels = arange(start, end, interval)
fid = 0
for current_level in nditer(levels):
self.feedback.pushInfo("[QNEAT3Network][calcIsoContours] Calculating {}-level contours".format(current_level))
contours = plt.contourf(x_grid, y_grid, raster_values, [0, current_level], antialiased=True)
for collection in contours.collections:
for contour_paths in collection.get_paths():
for polygon in contour_paths.to_polygons():
x = polygon[:,0]
y = polygon[:,1]
polylinexy_list = [QgsPointXY(i[0], i[1]) for i in zip(x,y)]
feat = QgsFeature()
fields = QgsFields()
fields.append(QgsField('id', QVariant.Int, '', 254, 0))
fields.append(QgsField('cost_level', QVariant.Double, '', 20, 7))
feat.setFields(fields)
geom = QgsGeometry().fromPolylineXY(polylinexy_list)
feat.setGeometry(geom)
feat['id'] = fid
feat['cost_level'] = float(current_level)
featurelist.insert(0, feat)
fid=fid+1
return featurelist
示例12: processAlgorithm
# 需要导入模块: from qgis.PyQt.QtCore import QVariant [as 别名]
# 或者: from qgis.PyQt.QtCore.QVariant import Double [as 别名]
def processAlgorithm(self, parameters, context, feedback):
feedback.pushInfo(self.tr("[QNEAT3Algorithm] This is a QNEAT3 Algorithm: '{}'".format(self.displayName())))
network = self.parameterAsSource(parameters, self.INPUT, context) #QgsProcessingFeatureSource
startPoint = self.parameterAsPoint(parameters, self.START_POINT, context, network.sourceCrs()) #QgsPointXY
max_dist = self.parameterAsDouble(parameters, self.MAX_DIST, context)#float
strategy = self.parameterAsEnum(parameters, self.STRATEGY, context) #int
entry_cost_calc_method = self.parameterAsEnum(parameters, self.ENTRY_COST_CALCULATION_METHOD, context) #int
directionFieldName = self.parameterAsString(parameters, self.DIRECTION_FIELD, context) #str (empty if no field given)
forwardValue = self.parameterAsString(parameters, self.VALUE_FORWARD, context) #str
backwardValue = self.parameterAsString(parameters, self.VALUE_BACKWARD, context) #str
bothValue = self.parameterAsString(parameters, self.VALUE_BOTH, context) #str
defaultDirection = self.parameterAsEnum(parameters, self.DEFAULT_DIRECTION, context) #int
speedFieldName = self.parameterAsString(parameters, self.SPEED_FIELD, context) #str
defaultSpeed = self.parameterAsDouble(parameters, self.DEFAULT_SPEED, context) #float
tolerance = self.parameterAsDouble(parameters, self.TOLERANCE, context) #float
analysisCrs = network.sourceCrs()
input_coordinates = [startPoint]
input_point = getFeatureFromPointParameter(startPoint)
feedback.pushInfo("[QNEAT3Algorithm] Building Graph...")
feedback.setProgress(10)
net = Qneat3Network(network, input_coordinates, strategy, directionFieldName, forwardValue, backwardValue, bothValue, defaultDirection, analysisCrs, speedFieldName, defaultSpeed, tolerance, feedback)
feedback.setProgress(40)
analysis_point = Qneat3AnalysisPoint("point", input_point, "point_id", net, net.list_tiedPoints[0], entry_cost_calc_method, feedback)
fields = QgsFields()
fields.append(QgsField('vertex_id', QVariant.Int, '', 254, 0))
fields.append(QgsField('cost', QVariant.Double, '', 254, 7))
fields.append(QgsField('origin_point_id',QVariant.String, '', 254, 7))
(sink, dest_id) = self.parameterAsSink(parameters, self.OUTPUT, context, fields, QgsWkbTypes.Point, network.sourceCrs())
feedback.pushInfo("[QNEAT3Algorithm] Calculating Iso-Pointcloud...")
iso_pointcloud = net.calcIsoPoints([analysis_point], max_dist)
feedback.setProgress(90)
sink.addFeatures(iso_pointcloud, QgsFeatureSink.FastInsert)
feedback.pushInfo("[QNEAT3Algorithm] Ending Algorithm")
feedback.setProgress(100)
results = {}
results[self.OUTPUT] = dest_id
return results
示例13: processAlgorithm
# 需要导入模块: from qgis.PyQt.QtCore import QVariant [as 别名]
# 或者: from qgis.PyQt.QtCore.QVariant import Double [as 别名]
def processAlgorithm(self, parameters, context, feedback):
feedback.pushInfo(self.tr("[QNEAT3Algorithm] This is a QNEAT3 Algorithm: '{}'".format(self.displayName())))
network = self.parameterAsSource(parameters, self.INPUT, context) #QgsProcessingFeatureSource
startPoints = self.parameterAsSource(parameters, self.START_POINTS, context) #QgsProcessingFeatureSource
id_field = self.parameterAsString(parameters, self.ID_FIELD, context) #str
max_dist = self.parameterAsDouble(parameters, self.MAX_DIST, context)#float
strategy = self.parameterAsEnum(parameters, self.STRATEGY, context) #int
entry_cost_calc_method = self.parameterAsEnum(parameters, self.ENTRY_COST_CALCULATION_METHOD, context) #int
directionFieldName = self.parameterAsString(parameters, self.DIRECTION_FIELD, context) #str (empty if no field given)
forwardValue = self.parameterAsString(parameters, self.VALUE_FORWARD, context) #str
backwardValue = self.parameterAsString(parameters, self.VALUE_BACKWARD, context) #str
bothValue = self.parameterAsString(parameters, self.VALUE_BOTH, context) #str
defaultDirection = self.parameterAsEnum(parameters, self.DEFAULT_DIRECTION, context) #int
speedFieldName = self.parameterAsString(parameters, self.SPEED_FIELD, context) #str
defaultSpeed = self.parameterAsDouble(parameters, self.DEFAULT_SPEED, context) #float
tolerance = self.parameterAsDouble(parameters, self.TOLERANCE, context) #float
analysisCrs = network.sourceCrs()
input_coordinates = getListOfPoints(startPoints)
feedback.pushInfo("[QNEAT3Algorithm] Building Graph...")
feedback.setProgress(10)
net = Qneat3Network(network, input_coordinates, strategy, directionFieldName, forwardValue, backwardValue, bothValue, defaultDirection, analysisCrs, speedFieldName, defaultSpeed, tolerance, feedback)
feedback.setProgress(40)
list_apoints = [Qneat3AnalysisPoint("from", feature, id_field, net, net.list_tiedPoints[i], entry_cost_calc_method, feedback) for i, feature in enumerate(getFeaturesFromQgsIterable(startPoints))]
fields = QgsFields()
fields.append(QgsField('vertex_id', QVariant.Int, '', 254, 0))
fields.append(QgsField('cost', QVariant.Double, '', 254, 7))
fields.append(QgsField('origin_point_id', getFieldDatatype(startPoints, id_field)))
(sink, dest_id) = self.parameterAsSink(parameters, self.OUTPUT, context, fields, QgsWkbTypes.Point, network.sourceCrs())
feedback.pushInfo("[QNEAT3Algorithm] Calculating Iso-Pointcloud...")
iso_pointcloud = net.calcIsoPoints(list_apoints, max_dist)
feedback.setProgress(90)
sink.addFeatures(iso_pointcloud, QgsFeatureSink.FastInsert)
feedback.pushInfo("[QNEAT3Algorithm] Ending Algorithm")
feedback.setProgress(100)
results = {}
results[self.OUTPUT] = dest_id
return results
示例14: initAlgorithm
# 需要导入模块: from qgis.PyQt.QtCore import QVariant [as 别名]
# 或者: from qgis.PyQt.QtCore.QVariant import Double [as 别名]
def initAlgorithm(self, config):
self.addParameter(
QgsProcessingParameterFeatureSource(
self.PrmInputLayer,
tr('Input point layer'),
[QgsProcessing.TypeVectorPoint])
)
self.addParameter(
QgsProcessingParameterEnum(
self.PrmShapeType,
tr('Shape type'),
options=SHAPE_TYPE,
defaultValue=0,
optional=False)
)
self.addParameter(
QgsProcessingParameterNumber(
self.PrmPetals,
tr('Number of petals'),
QgsProcessingParameterNumber.Integer,
defaultValue=8,
minValue=1,
optional=True)
)
self.addParameter(
QgsProcessingParameterNumber(
self.PrmStartingAngle,
tr('Starting angle'),
QgsProcessingParameterNumber.Double,
defaultValue=0,
optional=True)
)
self.addParameter(
QgsProcessingParameterNumber(
self.PrmRadius,
tr('Radius'),
QgsProcessingParameterNumber.Double,
defaultValue=40.0,
minValue=0,
optional=True)
)
self.addParameter(
QgsProcessingParameterEnum(
self.PrmUnitsOfMeasure,
tr('Radius units of measure'),
options=DISTANCE_LABELS,
defaultValue=0,
optional=False)
)
self.addParameter(
QgsProcessingParameterBoolean(
self.PrmExportInputGeometry,
tr('Add input geometry fields to output table'),
False,
optional=True)
)
self.addParameter(
QgsProcessingParameterFeatureSink(
self.PrmOutputLayer,
tr('Output layer'))
)
示例15: saveToLayer
# 需要导入模块: from qgis.PyQt.QtCore import QVariant [as 别名]
# 或者: from qgis.PyQt.QtCore.QVariant import Double [as 别名]
def saveToLayer(self):
units = self.unitDesignator()
canvasCrs = self.canvas.mapSettings().destinationCrs()
fields = QgsFields()
fields.append(QgsField("label", QVariant.String))
fields.append(QgsField("value", QVariant.Double))
fields.append(QgsField("units", QVariant.String))
fields.append(QgsField("heading_to", QVariant.Double))
fields.append(QgsField("heading_from", QVariant.Double))
fields.append(QgsField("total_dist", QVariant.Double))
layer = QgsVectorLayer("LineString?crs={}".format(canvasCrs.authid()), "Measurements", "memory")
dp = layer.dataProvider()
dp.addAttributes(fields)
layer.updateFields()
num = len(self.capturedPoints)
total = 0.0
for i in range(1, num):
(distance, startA, endA) = self.calcParameters(self.capturedPoints[i - 1], self.capturedPoints[i])
total += distance
total = self.unitDistance(total)
for i in range(1, num):
(distance, startA, endA) = self.calcParameters(self.capturedPoints[i - 1], self.capturedPoints[i])
pts = self.getLinePts(distance, self.capturedPoints[i - 1], self.capturedPoints[i])
distance = self.unitDistance(distance)
feat = QgsFeature(layer.fields())
feat.setAttribute(0, "{:.2f} {}".format(distance, units))
feat.setAttribute(1, distance)
feat.setAttribute(2, units)
feat.setAttribute(3, startA)
feat.setAttribute(4, endA)
feat.setAttribute(5, total)
feat.setGeometry(QgsGeometry.fromPolylineXY(pts))
dp.addFeatures([feat])
label = QgsPalLayerSettings()
label.fieldName = 'label'
try:
label.placement = QgsPalLayerSettings.Line
except Exception:
label.placement = QgsPalLayerSettings.AboveLine
format = label.format()
format.setColor(settings.measureTextColor)
format.setNamedStyle('Bold')
label.setFormat(format)
labeling = QgsVectorLayerSimpleLabeling(label)
layer.setLabeling(labeling)
layer.setLabelsEnabled(True)
renderer = layer.renderer()
renderer.symbol().setColor(settings.measureLineColor)
renderer.symbol().setWidth(0.5)
layer.updateExtents()
QgsProject.instance().addMapLayer(layer)