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edited May 3, 2023 at 7:48

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Create Creating virtual raster as a Layerlayer to map with PyQGIS

I would like to load a virtual raster as a layer into my map. I have tried changing the datasourcedata source attribute to 1 (relative), as described here: Loading virtual vector layer in QGIS

What do I need to change for the raster? I have tried both QgsRasterLayerQgsRasterLayer and QgsVectorLayerQgsVectorLayer.

from osgeo import gdal
import os

vrt_options = gdal.BuildVRTOptions(resampleAlg='nearestNeighbor', addAlpha=False)
gdal.BuildVRT(r'D:\QGIS\ni25.vrt', [r'D:\QGIS\dtk25.tif'], options=vrt_options)

vrt_path = r'D:\QGIS\ni25.vrt'
Layer = QgsRasterLayer(vrt_path, "ni25_vrt", "ogr")
if not Layer.isValid():
    print("Layer failed to load!")

QgsProject.instance().addMapLayer(Layer)

import os
from osgeo import gdal

vrt_options = gdal.BuildVRTOptions(resampleAlg='nearestNeighbor', addAlpha=False)
gdal.BuildVRT(r'D:\QGIS\ni25.vrt', [r'D:\QGIS\dtk25.tif'], options=vrt_options)

vrt_path = r'D:\QGIS\ni25.vrt'
Layer = QgsRasterLayer(vrt_path, "ni25_vrt", "ogr")

if not Layer.isValid():
    print("Layer failed to load!")

QgsProject.instance().addMapLayer(Layer)

The layer is added but nothing shows up inon the map and there is a warning saying that the laerlayer data source could not be found. When I drag the vrt into the layers window, it works.

Create virtual raster as a Layer to map with PyQGIS

I would like to load a virtual raster as a layer into my map. I have tried changing the datasource attribute to 1 (relative), as described here: Loading virtual vector layer in QGIS

What do I need to change for the raster? I have tried both QgsRasterLayer and QgsVectorLayer.

from osgeo import gdal
import os

vrt_options = gdal.BuildVRTOptions(resampleAlg='nearestNeighbor', addAlpha=False)
gdal.BuildVRT(r'D:\QGIS\ni25.vrt', [r'D:\QGIS\dtk25.tif'], options=vrt_options)

vrt_path = r'D:\QGIS\ni25.vrt'
Layer = QgsRasterLayer(vrt_path, "ni25_vrt", "ogr")
if not Layer.isValid():
    print("Layer failed to load!")

QgsProject.instance().addMapLayer(Layer)

The layer is added but nothing shows up in the map and there is a warning saying that the laer data source could not be found. When I drag the vrt into the layers window, it works.

Creating virtual raster as layer to map with PyQGIS

I would like to load a virtual raster as a layer into my map. I have tried changing the data source attribute to 1 (relative), as described here: Loading virtual vector layer in QGIS

What do I need to change for the raster? I have tried both QgsRasterLayer and QgsVectorLayer.

import os
from osgeo import gdal

vrt_options = gdal.BuildVRTOptions(resampleAlg='nearestNeighbor', addAlpha=False)
gdal.BuildVRT(r'D:\QGIS\ni25.vrt', [r'D:\QGIS\dtk25.tif'], options=vrt_options)

vrt_path = r'D:\QGIS\ni25.vrt'
Layer = QgsRasterLayer(vrt_path, "ni25_vrt", "ogr")

if not Layer.isValid():
    print("Layer failed to load!")

QgsProject.instance().addMapLayer(Layer)

The layer is added but nothing shows up on the map and there is a warning saying that the layer data source could not be found. When I drag the vrt into the layers window, it works.

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asked May 2, 2023 at 12:46

MoritzMoreira

Create virtual raster as a Layer to map with PyQGIS

I would like to load a virtual raster as a layer into my map. I have tried changing the datasource attribute to 1 (relative), as described here: Loading virtual vector layer in QGIS

What do I need to change for the raster? I have tried both QgsRasterLayer and QgsVectorLayer.

from osgeo import gdal
import os

vrt_options = gdal.BuildVRTOptions(resampleAlg='nearestNeighbor', addAlpha=False)
gdal.BuildVRT(r'D:\QGIS\ni25.vrt', [r'D:\QGIS\dtk25.tif'], options=vrt_options)

vrt_path = r'D:\QGIS\ni25.vrt'
Layer = QgsRasterLayer(vrt_path, "ni25_vrt", "ogr")
if not Layer.isValid():
    print("Layer failed to load!")

QgsProject.instance().addMapLayer(Layer)

The layer is added but nothing shows up in the map and there is a warning saying that the laer data source could not be found. When I drag the vrt into the layers window, it works.

pyqgis virtual-raster