def testImportIntoGpkg(self):
# init target file
test_gpkg = tempfile.mktemp(suffix='.gpkg', dir=self.testDataDir)
gdal.GetDriverByName('GPKG').Create(test_gpkg, 1, 1, 1)
source = QgsRasterLayer(os.path.join(self.testDataDir, 'raster', 'band3_byte_noct_epsg4326.tif'), 'my', 'gdal')
self.assertTrue(source.isValid())
provider = source.dataProvider()
fw = QgsRasterFileWriter(test_gpkg)
fw.setOutputFormat('gpkg')
fw.setCreateOptions(['RASTER_TABLE=imported_table', 'APPEND_SUBDATASET=YES'])
pipe = QgsRasterPipe()
self.assertTrue(pipe.set(provider.clone()))
projector = QgsRasterProjector()
projector.setCrs(provider.crs(), provider.crs())
self.assertTrue(pipe.insert(2, projector))
self.assertEqual(fw.writeRaster(pipe,
provider.xSize(),
provider.ySize(),
provider.extent(),
provider.crs()), 0)
# Check that the test geopackage contains the raster layer and compare
rlayer = QgsRasterLayer('GPKG:%s:imported_table' % test_gpkg)
self.assertTrue(rlayer.isValid())
out_provider = rlayer.dataProvider()
self.assertEqual(provider.block(1, provider.extent(), source.width(), source.height()).data(),
out_provider.block(1, out_provider.extent(), rlayer.width(), rlayer.height()).data())
# remove result file
os.unlink(test_gpkg)
def testImportIntoGpkg(self):
# init target file
test_gpkg = tempfile.mktemp(suffix='.gpkg', dir=self.testDataDir)
gdal.GetDriverByName('GPKG').Create(test_gpkg, 1, 1, 1)
source = QgsRasterLayer(os.path.join(self.testDataDir, 'raster', 'band3_byte_noct_epsg4326.tif'), 'my', 'gdal')
self.assertTrue(source.isValid())
provider = source.dataProvider()
fw = QgsRasterFileWriter(test_gpkg)
fw.setOutputFormat('gpkg')
fw.setCreateOptions(['RASTER_TABLE=imported_table', 'APPEND_SUBDATASET=YES'])
pipe = QgsRasterPipe()
self.assertTrue(pipe.set(provider.clone()))
projector = QgsRasterProjector()
projector.setCrs(provider.crs(), provider.crs())
self.assertTrue(pipe.insert(2, projector))
self.assertEqual(fw.writeRaster(pipe,
provider.xSize(),
provider.ySize(),
provider.extent(),
provider.crs()), 0)
# Check that the test geopackage contains the raster layer and compare
rlayer = QgsRasterLayer('GPKG:%s:imported_table' % test_gpkg)
self.assertTrue(rlayer.isValid())
out_provider = rlayer.dataProvider()
self.assertEqual(provider.block(1, provider.extent(), source.width(), source.height()).data(),
out_provider.block(1, out_provider.extent(), rlayer.width(), rlayer.height()).data())
# remove result file
os.unlink(test_gpkg)
def save_raster_to_geopackage(raster_layer, project_dir):
"""Save a GeoPackage raster to GeoPackage table in the project directory."""
layer_filename = get_unique_filename(
os.path.join(project_dir,
raster_layer.name() + ".gpkg"))
raster_writer = QgsRasterFileWriter(layer_filename)
raster_writer.setOutputFormat("gpkg")
raster_writer.setCreateOptions(
[f"RASTER_TABLE={raster_layer.name()}", "APPEND_SUBDATASET=YES"])
write_raster(raster_layer, raster_writer, layer_filename)
def exportRasterLayer(self, layer, destinationFile, options=None):
outputFormat = self.settings['rasterFormat'] if 'rasterFormat' in self.settings else 'GTiff'
if os.path.splitext(destinationFile)[1] == '':
formats = QgsRasterFileWriter.extensionsForFormat(outputFormat)
if len(formats) > 0:
destinationFile = '{}.{}'.format(destinationFile, formats[0])
provider = layer.dataProvider()
cols = provider.xSize()
rows = provider.ySize()
if not provider.capabilities() & QgsRasterDataProvider.Size:
k = float(provider.extent().width()) / float(provider.extent().height())
cols = RASTER_SIZE * k
rows = RASTER_SIZE
pipe = QgsRasterPipe()
if not pipe.set(provider.clone()):
QgsMessageLog.logMessage(self.tr('Failed to export layer "{layer}": Cannot set pipe provider.'.format(layer=layer.name())), 'QConsolidate', Qgis.Warning)
return False, None
nodata = {}
for i in range(1, provider.bandCount() + 1):
if provider.sourceHasNoDataValue(i):
value = provider.sourceNoDataValue(i)
nodata[i] = QgsRasterRange(value, value)
nuller = QgsRasterNuller()
for band, value in nodata.items():
nuller.setNoData(band, [value])
if not pipe.insert(1, nuller):
QgsMessageLog.logMessage(self.tr('Failed to export layer "{layer}": Cannot set pipe nuller.'.format(layer=layer.name())), 'QConsolidate', Qgis.Warning)
return False, None
writer = QgsRasterFileWriter(destinationFile)
writer.setOutputFormat(outputFormat)
if options is not None:
writer.setCreateOptions(options)
success = True
error = writer.writeRaster(pipe, cols, rows, provider.extent(), provider.crs())
if error != QgsRasterFileWriter.NoError:
QgsMessageLog.logMessage(self.tr('Failed to export layer "{layer}": {message}.'.format(layer=layer.name(), message=error)), 'QConsolidate', Qgis.Warning)
success = False
return success, destinationFile
def save_raster_as_geotif(raster_layer, project_dir):
"""Save raster layer as GeoTiff in the project directory."""
new_raster_filename = get_unique_filename(raster_layer.name() + ".tif")
layer_filename = os.path.join(project_dir,
os.path.basename(new_raster_filename))
# Get data type info to set a proper compression type
dp = raster_layer.dataProvider()
is_byte_data = [
dp.dataType(i) <= Qgis.Byte for i in range(raster_layer.bandCount())
]
compression = "JPEG" if all(is_byte_data) else "LZW"
writer_options = [f"COMPRESS={compression}", "TILED=YES"]
raster_writer = QgsRasterFileWriter(layer_filename)
raster_writer.setCreateOptions(writer_options)
raster_writer.setBuildPyramidsFlag(QgsRaster.PyramidsFlagYes)
raster_writer.setPyramidsFormat(QgsRaster.PyramidsInternal)
raster_writer.setPyramidsList([2, 4, 8, 16, 32, 64, 128])
write_raster(raster_layer, raster_writer, layer_filename)
def exportRasterLayer(self, layer, destinationFile, options=None):
outputFormat = self.settings[
'rasterFormat'] if 'rasterFormat' in self.settings else 'GTiff'
if os.path.splitext(destinationFile)[1] == '':
formats = QgsRasterFileWriter.extensionsForFormat(outputFormat)
if len(formats) > 0:
destinationFile = '{}.{}'.format(destinationFile, formats[0])
provider = layer.dataProvider()
cols = provider.xSize()
rows = provider.ySize()
if not provider.capabilities() & QgsRasterDataProvider.Size:
k = float(provider.extent().width()) / float(
provider.extent().height())
cols = RASTER_SIZE * k
rows = RASTER_SIZE
pipe = QgsRasterPipe()
if not pipe.set(provider.clone()):
QgsMessageLog.logMessage(
self.
tr('Failed to export layer "{layer}": Cannot set pipe provider.'
).format(layer=layer.name()), 'QConsolidate', Qgis.Warning)
return False, None
nodata = {}
for i in range(1, provider.bandCount() + 1):
if provider.sourceHasNoDataValue(i):
value = provider.sourceNoDataValue(i)
nodata[i] = QgsRasterRange(value, value)
nuller = QgsRasterNuller()
for band, value in nodata.items():
nuller.setNoData(band, [value])
if not pipe.insert(1, nuller):
QgsMessageLog.logMessage(
self.tr(
'Failed to export layer "{layer}": Cannot set pipe nuller.'
).format(layer=layer.name()), 'QConsolidate', Qgis.Warning)
return False, None
writer = QgsRasterFileWriter(destinationFile)
writer.setOutputFormat(outputFormat)
if options is not None:
writer.setCreateOptions(options)
success = True
error = writer.writeRaster(pipe, cols, rows, provider.extent(),
provider.crs())
if error != QgsRasterFileWriter.NoError:
QgsMessageLog.logMessage(
self.tr('Failed to export layer "{layer}": {message}.').format(
layer=layer.name(), message=error), 'QConsolidate',
Qgis.Warning)
success = False
return success, destinationFile
