def geotiff_save(self, filename, compression=6,
tags=None, gdal_options=None,
blocksize=0, geotransform=None,
spatialref=None, floating_point=False):
"""Save the image to the given *filename* in geotiff_ format, with the
*compression* level in [0, 9]. 0 means not compressed. The *tags*
argument is a dict of tags to include in the image (as metadata). By
default it uses the 'area' instance to generate geotransform and
spatialref information, this can be overwritten by the arguments
*geotransform* and *spatialref*. *floating_point* allows the saving of
'L' mode images in floating point format if set to True.
.. _geotiff: http://trac.osgeo.org/geotiff/
"""
from osgeo import gdal, osr
raster = gdal.GetDriverByName("GTiff")
if floating_point:
if self.mode != "L":
raise ValueError("Image must be in 'L' mode for floating point"
" geotif saving")
channels = [self.channels[0].astype(np.float64)]
fill_value = self.fill_value or 0
gformat = gdal.GDT_Float64
else:
channels, fill_value = self._finalize()
gformat = gdal.GDT_Byte
LOG.debug("Saving to GeoTiff.")
if tags is not None:
self.tags.update(tags)
if gdal_options is not None:
self.gdal_options.update(gdal_options)
g_opts = ["=".join(i) for i in self.gdal_options.items()]
if compression != 0:
g_opts.append("COMPRESS=DEFLATE")
g_opts.append("ZLEVEL=" + str(compression))
if blocksize != 0:
g_opts.append("TILED=YES")
g_opts.append("BLOCKXSIZE=" + str(blocksize))
g_opts.append("BLOCKYSIZE=" + str(blocksize))
if(self.mode == "L"):
ensure_dir(filename)
if fill_value is not None:
dst_ds = raster.Create(filename,
self.width,
self.height,
1,
gformat,
g_opts)
else:
g_opts.append("ALPHA=YES")
dst_ds = raster.Create(filename,
self.width,
self.height,
2,
gformat,
g_opts)
self._gdal_write_channels(dst_ds, channels, 255, fill_value)
elif(self.mode == "LA"):
ensure_dir(filename)
g_opts.append("ALPHA=YES")
dst_ds = raster.Create(filename,
self.width,
self.height,
2,
gformat,
g_opts)
self._gdal_write_channels(dst_ds,
channels[:-1], channels[1],
fill_value)
elif(self.mode == "RGB"):
ensure_dir(filename)
if fill_value is not None:
dst_ds = raster.Create(filename,
self.width,
self.height,
3,
gformat,
g_opts)
else:
g_opts.append("ALPHA=YES")
dst_ds = raster.Create(filename,
self.width,
self.height,
4,
gformat,
g_opts)
self._gdal_write_channels(dst_ds, channels, 255, fill_value)
elif(self.mode == "RGBA"):
ensure_dir(filename)
g_opts.append("ALPHA=YES")
dst_ds = raster.Create(filename,
self.width,
self.height,
4,
gformat,
g_opts)
self._gdal_write_channels(dst_ds, channels[:-1], channels[3], fill_value)
else:
raise NotImplementedError("Saving to GeoTIFF using image mode"
" %s is not implemented."%self.mode)
# Create raster GeoTransform based on upper left corner and pixel
# resolution ... if not overwritten by argument geotranform.
if geotransform:
dst_ds.SetGeoTransform(geotransform)
if spatialref:
if not isinstance(spatialref, str):
spatialref = spatialref.ExportToWkt()
dst_ds.SetProjection(spatialref)
else:
try:
from pyresample import utils
from mpop.projector import get_area_def
area = get_area_def(self.area)
except (utils.AreaNotFound, AttributeError):
area = self.area
try:
adfgeotransform = [area.area_extent[0], area.pixel_size_x, 0,
area.area_extent[3], 0, -area.pixel_size_y]
dst_ds.SetGeoTransform(adfgeotransform)
srs = osr.SpatialReference()
srs.ImportFromProj4(area.proj4_string)
srs.SetProjCS(area.proj_id)
try:
srs.SetWellKnownGeogCS(area.proj_dict['ellps'])
except KeyError:
pass
try:
# Check for epsg code.
srs.SetAuthority('PROJCS', 'EPSG',
int(area.proj_dict['init'].
split('epsg:')[1]))
except (KeyError, IndexError):
pass
srs = srs.ExportToWkt()
dst_ds.SetProjection(srs)
except AttributeError:
LOG.exception("Could not load geographic data, invalid area")
self.tags.update({'TIFFTAG_DATETIME':
self.time_slot.strftime("%Y:%m:%d %H:%M:%S")})
dst_ds.SetMetadata(self.tags, '')
# Close the dataset
dst_ds = None
def geotiff_save(
self, filename, compression=6, tags=None, gdal_options=None, blocksize=0, geotransform=None, spatialref=None
):
"""Save the image to the given *filename* in geotiff_ format, with the
*compression* level in [0, 9]. 0 means not compressed. The *tags*
argument is a dict of tags to include in the image (as metadata).
By default it uses the 'area' instance to generate geotransform and spatialref
information, this can be overwritte by the arguments *geotransform* and
*spatialref*.
.. _geotiff: http://trac.osgeo.org/geotiff/
"""
from osgeo import gdal, osr
raster = gdal.GetDriverByName("GTiff")
channels, fill_value = self._finalize()
LOG.debug("Saving to GeoTiff.")
if tags is not None:
self.tags.update(tags)
if gdal_options is not None:
self.gdal_options.update(gdal_options)
g_opts = ["=".join(i) for i in self.gdal_options.items()]
if compression != 0:
g_opts.append("COMPRESS=DEFLATE")
g_opts.append("ZLEVEL=" + str(compression))
if blocksize != 0:
g_opts.append("TILED=YES")
g_opts.append("BLOCKXSIZE=" + str(blocksize))
g_opts.append("BLOCKYSIZE=" + str(blocksize))
if self.mode == "L":
ensure_dir(filename)
if fill_value is not None:
dst_ds = raster.Create(filename, self.width, self.height, 1, gdal.GDT_Byte, g_opts)
else:
dst_ds = raster.Create(filename, self.width, self.height, 2, gdal.GDT_Byte, g_opts)
self._gdal_write_channels(dst_ds, channels, 255, fill_value)
elif self.mode == "RGB":
ensure_dir(filename)
if fill_value is not None:
dst_ds = raster.Create(filename, self.width, self.height, 3, gdal.GDT_Byte, g_opts)
else:
dst_ds = raster.Create(filename, self.width, self.height, 4, gdal.GDT_Byte, g_opts)
self._gdal_write_channels(dst_ds, channels, 255, fill_value)
elif self.mode == "RGBA":
ensure_dir(filename)
dst_ds = raster.Create(filename, self.width, self.height, 4, gdal.GDT_Byte, g_opts)
self._gdal_write_channels(dst_ds, channels, channels[3], fill_value)
else:
raise NotImplementedError("Saving to GeoTIFF using image mode" " %s is not implemented." % self.mode)
# Create raster GeoTransform based on upper left corner and pixel
# resolution ... if not overwritten by argument geotranform.
if geotransform:
dst_ds.SetGeoTransform(geotransform)
if spatialref:
if not isinstance(spatialref, str):
spatialref = spatialref.ExportToWkt()
dst_ds.SetProjection(spatialref)
else:
try:
from pyresample import utils
from mpop.projector import get_area_def
area = get_area_def(self.area_id)
except (utils.AreaNotFound, AttributeError):
area = self.area_id
try:
adfgeotransform = [
area.area_extent[0],
area.pixel_size_x,
0,
area.area_extent[3],
0,
-area.pixel_size_y,
]
dst_ds.SetGeoTransform(adfgeotransform)
srs = osr.SpatialReference()
srs.SetProjCS(area.proj_id)
srs.ImportFromProj4(area.proj4_string)
srs = srs.ExportToWkt()
dst_ds.SetProjection(srs)
except AttributeError:
LOG.exception("Could not load geographic data, invalid area")
self.tags.update({"TIFFTAG_DATETIME": self.time_slot.strftime("%Y:%m:%d %H:%M:%S")})
dst_ds.SetMetadata(self.tags, "")
# Close the dataset
dst_ds = None
