本文整理汇总了Python中qgis.core.QgsRasterLayer.subLayers方法的典型用法代码示例。如果您正苦于以下问题：Python QgsRasterLayer.subLayers方法的具体用法？Python QgsRasterLayer.subLayers怎么用？Python QgsRasterLayer.subLayers使用的例子？那么恭喜您, 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.core.QgsRasterLayer的用法示例。
在下文中一共展示了QgsRasterLayer.subLayers方法的2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: getRasterSublayer
# 需要导入模块: from qgis.core import QgsRasterLayer [as 别名]
# 或者: from qgis.core.QgsRasterLayer import subLayers [as 别名]
def getRasterSublayer(path, param):
layer = QgsRasterLayer(path)
try:
# If the layer is a raster layer and has multiple sublayers, let the user chose one.
# Based on QgisApp::askUserForGDALSublayers
if layer and param.showSublayersDialog and layer.dataProvider().name() == "gdal" and len(layer.subLayers()) > 1:
layers = []
subLayerNum = 0
# simplify raster sublayer name
for subLayer in layer.subLayers():
# if netcdf/hdf use all text after filename
if bool(re.match('netcdf', subLayer, re.I)) or bool(re.match('hdf', subLayer, re.I)):
subLayer = subLayer.split(path)[1]
subLayer = subLayer[1:]
else:
# remove driver name and file name
subLayer.replace(subLayer.split(QgsDataProvider.SUBLAYER_SEPARATOR)[0], "")
subLayer.replace(path, "")
# remove any : or " left over
if subLayer.startswith(":"):
subLayer = subLayer[1:]
if subLayer.startswith("\""):
subLayer = subLayer[1:]
if subLayer.endswith(":"):
subLayer = subLayer[:-1]
if subLayer.endswith("\""):
subLayer = subLayer[:-1]
ld = QgsSublayersDialog.LayerDefinition()
ld.layerId = subLayerNum
ld.layerName = subLayer
layers.append(ld)
subLayerNum = subLayerNum + 1
# Use QgsSublayersDialog
# Would be good if QgsSublayersDialog had an option to allow only one sublayer to be selected
chooseSublayersDialog = QgsSublayersDialog(QgsSublayersDialog.Gdal, "gdal")
chooseSublayersDialog.populateLayerTable(layers)
if chooseSublayersDialog.exec_():
return layer.subLayers()[chooseSublayersDialog.selectionIndexes()[0]]
else:
# If user pressed cancel then just return the input path
return path
else:
# If the sublayers selection dialog is not to be shown then just return the input path
return path
except:
# If the layer is not a raster layer, then just return the input path
return path示例2: select_HDF5_file
# 需要导入模块: from qgis.core import QgsRasterLayer [as 别名]
# 或者: from qgis.core.QgsRasterLayer import subLayers [as 别名]
def select_HDF5_file(self):
"""Run method that performs all the real work"""
# show the dialog
#self.dlg.show()
# Run the dialog event loop
result = self.dlg.exec_()
# close the dialog
self.dlg.close()
# See if OK was pressed
if result:
#### to open windows browser and search for HDF5 files only:
myfileNames = QFileDialog.getOpenFileNames(self.dlg,
self.tr("HDF5 File Selector"),
"",
self.tr("HDF5 (*.hdf5 *.h5)"))
#### to loop through all selected HDF5 files, just handling one for now
for i in myfileNames:
#### bind the HDF5 file
myfile = QgsRasterLayer(i)
#### to deal with multiple datasets within file
if (len(myfile.subLayers()) > 1):
#### to open dataset with desired data and name it Reflectance
#mydset = QgsRasterLayer(myfile.subLayers()[0], 'Reflectance')
fileName = myfile.subLayers()[0]
fileInfo = QFileInfo(fileName)
baseName = fileInfo.baseName()
mydset = QgsRasterLayer(fileName, baseName)
##################################### Trials of setting proper extent begin here
print 'Extent before: '
print mydset.extent().toString()
########################## test almost worked
### loaded layer in right place but without data
#rect = QgsRectangle(326380.0,4103390.0-2853,326380.0+1332,4103390.0)
#mydset.setExtent(rect)
####################################
######################## test almost worked
### loaded layer in right place but without data
#size = QSizeF(1,1)
#point = QPointF(326380.0, 4103390.0)
#rect = QRectF(point, size)
#rect = QgsRectangle(rect)
#mydset.setExtent(rect)
###################################
########################## did not change extent
#rect = QgsRectangle(326380.0,4103390.0-2853,326380.0+1332,4103390.0)
#context = QgsRenderContext()
#context.setExtent(rect)
#mydset.draw(context)
####################################
#################################### did not change extent
#size = QSizeF(1,1)
#point = QPointF(326380.0, 4103390.0)
#rect = QRectF(point, size)
#rect = QgsRectangle(rect)
#context = QgsRenderContext()
#context.setExtent(rect)
#mydset.draw(context)
#####################################
###################################### did not change extent
#rect = QgsRectangle(326380.0,4103390.0-2853,326380.0+1332,4103390.0)
#context = QgsRenderContext()
#context.setExtent(rect)
#print 'Context extent: '
#print context.extent().toString() #this printed correct extent
#mydset.createMapRenderer(context)
#######################################
######################## test almost worked
### loaded layer in right place but without data
#rect = QgsRectangle(326380.0,4103390.0-2853,326380.0+1332,4103390.0)
#provider = mydset.dataProvider().clone()
#mydset.setExtent(rect)
#provider.reloadData()
######################################
########################################
# did not change extent, loaded data
#rect = QgsRectangle(326380.0,4103390.0-2853,326380.0+1332,4103390.0)
#context = QgsRenderContext()
#context.setExtent(rect)
#renderer = mydset.createMapRenderer(context)
#renderer.render()
#########################################
###########################################
# did not change extent, loaded data
#rect = QgsRectangle(326380.0,4103390.0-2853,326380.0+1332,4103390.0)
#.........这里部分代码省略.........