def __init__(self, srs=None, ext=None, ds=None, **kwargs):
"""Create Domain from GDALDataset or string options or lat/lon grids"""
# If too much information is given raise error
if ds is not None and srs is not None and ext is not None:
raise ValueError(
'Ambiguous specification of both dataset, srs- and ext-strings.'
)
# choose between input opitons:
# ds
# ds and srs
# srs and ext
# if only a dataset is given:
# copy geo-reference from the dataset
if ds is not None and srs is None:
self.vrt = VRT.from_gdal_dataset(ds)
# If dataset and srs are given (but not ext):
# use AutoCreateWarpedVRT to determine bounds and resolution
elif ds is not None and srs is not None:
srs = NSR(srs)
tmp_vrt = gdal.AutoCreateWarpedVRT(ds, None, srs.wkt)
if tmp_vrt is None:
raise NansatProjectionError(
'Could not warp the given dataset to the given SRS.')
else:
self.vrt = VRT.from_gdal_dataset(tmp_vrt)
# If SpatialRef and extent string are given (but not dataset)
elif srs is not None and ext is not None:
srs = NSR(srs)
# create full dictionary of parameters
extent_dict = Domain._create_extent_dict(ext)
# convert -lle to -te
if 'lle' in extent_dict.keys():
extent_dict = self._convert_extentDic(srs, extent_dict)
# get size/extent from the created extent dictionary
geo_transform, raster_x_size, raster_y_size = self._get_geotransform(
extent_dict)
# create VRT object with given geo-reference parameters
self.vrt = VRT.from_dataset_params(x_size=raster_x_size,
y_size=raster_y_size,
geo_transform=geo_transform,
projection=srs.wkt,
gcps=[],
gcp_projection='')
elif 'lat' in kwargs and 'lon' in kwargs:
warnings.warn(
'Domain(lon=lon, lat=lat) will be deprectaed!'
'Use Domain.from_lonlat()', NansatFutureWarning)
# create self.vrt from given lat/lon
self.vrt = VRT.from_lonlat(kwargs['lon'], kwargs['lat'])
else:
raise ValueError('"dataset" or "srsString and extentString" '
'or "dataset and srsString" are required')
def __init__(self,
srs=None,
ext=None,
ds=None,
lon=None,
lat=None,
name='',
logLevel=None):
'''Create Domain from GDALDataset or string options or lat/lon grids
d = Domain(srs, ext)
Size, extent and spatial reference is given by strings
d = Domain(ds=GDALDataset):
Size, extent and spatial reference is copied from input
GDAL dataset
d = Domain(srs, ds=GDALDataset):
Spatial reference is given by srs, but size and extent is
determined
from input GDAL dataset
d = Domain(lon=lonGrid, lat=latGrid)
Size, extent and spatial reference is given by two grids
Parameters
----------
srs : PROJ4 or EPSG or WKT or NSR or osr.SpatialReference()
Input parameter for nansat.NSR()
ext : string
some gdalwarp options + additional options
[http://www.gdal.org/gdalwarp.html]
Specifies extent, resolution / size
Available options: (('-te' or '-lle') and ('-tr' or '-ts'))
(e.g. '-lle -10 30 55 60 -ts 1000 1000' or
'-te 100 2000 300 10000 -tr 300 200')
-tr resolutionx resolutiony
-ts sizex sizey
-te xmin ymin xmax ymax
-lle lonmin latmin lonmax latmax
ds : GDAL dataset
lat : Numpy array
Grid with latitudes
lon : Numpy array
Grid with longitudes
name : string, optional
Name to be added to the Domain object
logLevel : int, optional, default=30
level of logging
Raises
-------
ProjectionError : occurs when Projection() is empty
despite it is required for creating extentDic.
OptionError : occures when the arguments are not proper.
Modifies
---------
self.vrt.datasetset : dataset in memory
dataset is created based on the input arguments
See Also
---------
Nansat.reproject()
[http://www.gdal.org/gdalwarp.html]
[http://trac.osgeo.org/proj/]
[http://spatialreference.org/]
[http://www.gdal.org/ogr/osr_tutorial.html]
'''
# set default attributes
self.logger = add_logger('Nansat', logLevel)
self.name = name
self.logger.debug('ds: %s' % str(ds))
self.logger.debug('srs: %s' % srs)
self.logger.debug('ext: %s' % ext)
# If too much information is given raise error
if ds is not None and srs is not None and ext is not None:
raise OptionError('Ambiguous specification of both '
'dataset, srs- and ext-strings.')
# choose between input opitons:
# ds
# ds and srs
# srs and ext
# lon and lat
# if only a dataset is given:
# copy geo-reference from the dataset
if ds is not None and srs is None:
self.vrt = VRT(gdalDataset=ds)
# If dataset and srs are given (but not ext):
# use AutoCreateWarpedVRT to determine bounds and resolution
elif ds is not None and srs is not None:
srs = NSR(srs)
tmpVRT = gdal.AutoCreateWarpedVRT(ds, None, srs.wkt)
if tmpVRT is None:
raise ProjectionError('Could not warp the given dataset'
'to the given SRS.')
else:
self.vrt = VRT(gdalDataset=tmpVRT)
# If SpatialRef and extent string are given (but not dataset)
elif srs is not None and ext is not None:
srs = NSR(srs)
# create full dictionary of parameters
extentDic = self._create_extentDic(ext)
# convert -lle to -te
if 'lle' in extentDic.keys():
extentDic = self._convert_extentDic(srs, extentDic)
# get size/extent from the created extet dictionary
[geoTransform, rasterXSize,
rasterYSize] = self._get_geotransform(extentDic)
# create VRT object with given geo-reference parameters
self.vrt = VRT(srcGeoTransform=geoTransform,
srcProjection=srs.wkt,
srcRasterXSize=rasterXSize,
srcRasterYSize=rasterYSize)
self.extentDic = extentDic
elif lat is not None and lon is not None:
# create self.vrt from given lat/lon
self.vrt = VRT(lat=lat, lon=lon)
else:
raise OptionError('"dataset" or "srsString and extentString" '
'or "dataset and srsString" are required')
self.logger.debug('vrt.dataset: %s' % str(self.vrt.dataset))
def __init__(self,
srs=None,
ext=None,
ds=None,
lon=None,
lat=None,
name='',
logLevel=None):
"""Create Domain from GDALDataset or string options or lat/lon grids"""
# set default attributes
self.logger = add_logger('Nansat', logLevel)
self.name = name
self.logger.debug('ds: %s' % str(ds))
self.logger.debug('srs: %s' % srs)
self.logger.debug('ext: %s' % ext)
# If too much information is given raise error
if ds is not None and srs is not None and ext is not None:
raise ValueError(
'Ambiguous specification of both dataset, srs- and ext-strings.'
)
# choose between input opitons:
# ds
# ds and srs
# srs and ext
# lon and lat
# if only a dataset is given:
# copy geo-reference from the dataset
if ds is not None and srs is None:
self.vrt = VRT.from_gdal_dataset(ds)
# If dataset and srs are given (but not ext):
# use AutoCreateWarpedVRT to determine bounds and resolution
elif ds is not None and srs is not None:
srs = NSR(srs)
tmp_vrt = gdal.AutoCreateWarpedVRT(ds, None, srs.wkt)
if tmp_vrt is None:
raise NansatProjectionError(
'Could not warp the given dataset to the given SRS.')
else:
self.vrt = VRT.from_gdal_dataset(tmp_vrt)
# If SpatialRef and extent string are given (but not dataset)
elif srs is not None and ext is not None:
srs = NSR(srs)
# create full dictionary of parameters
extent_dict = Domain._create_extent_dict(ext)
# convert -lle to -te
if 'lle' in extent_dict.keys():
extent_dict = self._convert_extentDic(srs, extent_dict)
# get size/extent from the created extent dictionary
geo_transform, raster_x_size, raster_y_size = self._get_geotransform(
extent_dict)
# create VRT object with given geo-reference parameters
self.vrt = VRT.from_dataset_params(x_size=raster_x_size,
y_size=raster_y_size,
geo_transform=geo_transform,
projection=srs.wkt,
gcps=[],
gcp_projection='')
elif lat is not None and lon is not None:
# create self.vrt from given lat/lon
self.vrt = VRT.from_lonlat(lon, lat)
else:
raise ValueError('"dataset" or "srsString and extentString" '
'or "dataset and srsString" are required')
self.logger.debug('vrt.dataset: %s' % str(self.vrt.dataset))
