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Creating memory layer with .png image using PyQGIS?

.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;

0

In Aligning Raster and vector layer using PyQGIS when they do not match?, someone gave a solution for creating a point memory layer to correctly align a raster image with a vector.

I am wondering how this can be implemented for a .PNG raster image?

I think the method is the same, just the commands would be different?

I have tried:

def addRasterImage1(self):
 x = self.lon0 
 y = self.lat0
 self.layers = []
 fileName = 'Desktop' 

 dir = os.path.dirname(fileName) if fileName is not None else "." #path of the saved raster image
 formats = ["*.%s" % "PNG"] 

 file = myfile_list[k_zt] #raster image to load onto vector image
 print file
 if file:
 layer = QgsRasterLayer(file, fileName)
 print "layer",layer

 if not layer.isValid():
 return

 # add layer to the registry
 QgsMapLayerRegistry.instance().addMapLayer(layer)

 # # set extent to the extent of layer
 self.canvas.setExtent(layer.extent()) 
 self.layers.insert(0, QgsMapCanvasLayer(layer))

 print "layers number:",len(self.layers)
 self.canvas.setLayerSet(self.layers)
 self.canvas.refresh()
 self.MyWorldLayer(ext = False)

Which produces a shifted raster png file on the vector map (the vector map is self.MyWorldLayer()).

I have then also tried changing the raster layer by resampling, similar to the code Changing Raster Layer Resampling with PyQGIS?.

raster coordinate-system pyqgis vector

share|improve this question

edited Apr 15 at 13:11

user137875

asked Apr 12 at 18:06

user137875user137875

314

add a comment | 

0

In Aligning Raster and vector layer using PyQGIS when they do not match?, someone gave a solution for creating a point memory layer to correctly align a raster image with a vector.

I am wondering how this can be implemented for a .PNG raster image?

I think the method is the same, just the commands would be different?

I have tried:

def addRasterImage1(self):
 x = self.lon0 
 y = self.lat0
 self.layers = []
 fileName = 'Desktop' 

 dir = os.path.dirname(fileName) if fileName is not None else "." #path of the saved raster image
 formats = ["*.%s" % "PNG"] 

 file = myfile_list[k_zt] #raster image to load onto vector image
 print file
 if file:
 layer = QgsRasterLayer(file, fileName)
 print "layer",layer

 if not layer.isValid():
 return

 # add layer to the registry
 QgsMapLayerRegistry.instance().addMapLayer(layer)

 # # set extent to the extent of layer
 self.canvas.setExtent(layer.extent()) 
 self.layers.insert(0, QgsMapCanvasLayer(layer))

 print "layers number:",len(self.layers)
 self.canvas.setLayerSet(self.layers)
 self.canvas.refresh()
 self.MyWorldLayer(ext = False)

Which produces a shifted raster png file on the vector map (the vector map is self.MyWorldLayer()).

I have then also tried changing the raster layer by resampling, similar to the code Changing Raster Layer Resampling with PyQGIS?.

raster coordinate-system pyqgis vector

share|improve this question

edited Apr 15 at 13:11

user137875

asked Apr 12 at 18:06

user137875user137875

314

add a comment | 

In Aligning Raster and vector layer using PyQGIS when they do not match?, someone gave a solution for creating a point memory layer to correctly align a raster image with a vector.

I am wondering how this can be implemented for a .PNG raster image?

I think the method is the same, just the commands would be different?

I have tried:

def addRasterImage1(self):
 x = self.lon0 
 y = self.lat0
 self.layers = []
 fileName = 'Desktop' 

 dir = os.path.dirname(fileName) if fileName is not None else "." #path of the saved raster image
 formats = ["*.%s" % "PNG"] 

 file = myfile_list[k_zt] #raster image to load onto vector image
 print file
 if file:
 layer = QgsRasterLayer(file, fileName)
 print "layer",layer

 if not layer.isValid():
 return

 # add layer to the registry
 QgsMapLayerRegistry.instance().addMapLayer(layer)

 # # set extent to the extent of layer
 self.canvas.setExtent(layer.extent()) 
 self.layers.insert(0, QgsMapCanvasLayer(layer))

 print "layers number:",len(self.layers)
 self.canvas.setLayerSet(self.layers)
 self.canvas.refresh()
 self.MyWorldLayer(ext = False)

Which produces a shifted raster png file on the vector map (the vector map is self.MyWorldLayer()).

I have then also tried changing the raster layer by resampling, similar to the code Changing Raster Layer Resampling with PyQGIS?.

raster coordinate-system pyqgis vector

share|improve this question

edited Apr 15 at 13:11

user137875

asked Apr 12 at 18:06

user137875user137875

314

def addRasterImage1(self):
 x = self.lon0 
 y = self.lat0
 self.layers = []
 fileName = 'Desktop' 

 dir = os.path.dirname(fileName) if fileName is not None else "." #path of the saved raster image
 formats = ["*.%s" % "PNG"] 

 file = myfile_list[k_zt] #raster image to load onto vector image
 print file
 if file:
 layer = QgsRasterLayer(file, fileName)
 print "layer",layer

 if not layer.isValid():
 return

 # add layer to the registry
 QgsMapLayerRegistry.instance().addMapLayer(layer)

 # # set extent to the extent of layer
 self.canvas.setExtent(layer.extent()) 
 self.layers.insert(0, QgsMapCanvasLayer(layer))

 print "layers number:",len(self.layers)
 self.canvas.setLayerSet(self.layers)
 self.canvas.refresh()
 self.MyWorldLayer(ext = False)

share|improve this question

edited Apr 15 at 13:11

user137875

asked Apr 12 at 18:06

user137875user137875

314

share|improve this question

edited Apr 15 at 13:11

user137875

asked Apr 12 at 18:06

user137875user137875

314

asked Apr 12 at 18:06

user137875user137875

314

asked Apr 12 at 18:06

user137875user137875

314