python3.6: gdal.Open('*.tif') succeed, but ReadAsArray() got 'NoneType' error
I'm using gdal to read jp2 by lines, here is the code:
def open(self):
if self.ds is None:
self.ds = gdal.Open(self.file_path, gdal.GA_ReadOnly)
self.geo_transform = self.ds.GetGeoTransform()
self.rows = self.ds.RasterYSize
self.cols = self.ds.RasterXSize
def read_strip(self, y_start, read_y_size):
"""
y_start : y in projection coordinate
"""
self.open()
if not self.ds:
raise IOError("Could not open '%s'" % self.file_path)
y_off = int((y_start - self.geo_transform[3]) / self.geo_transform[5])
if y_off < 0 or y_off >= self.rows:
return None
else:
read_y_size_in_data = min(self.rows - y_off, read_y_size)
try:
read_data = self.ds.ReadAsArray(0, y_off, ysize=read_y_size_in_data)
band_data = read_data.astype(float)
self.logger.info('{}, {}, {}'.format(read_y_size, y_off, read_y_size_in_data))
return band_data
except Exception:
self.logger.exception('this file is Nonetype, file: {}'.format(self.file_path))
self.logger.info('{}, {}, {}'.format(read_y_size, y_off, read_y_size_in_data))
self.close()
Here is the error message:
Traceback (most recent call last): File "scene_reader.py", line 62, in read_strip band_data = read_data.astype(float), 'NoneType' object has no attribute 'astype'
Every time I run the code, I did not get any IOError, which means the jp2 file is opened successfully, while the ReadAsArray() got an 'Nonetype' error. by the way, I have tried to just use gdal.Open() and ReadAsArray() to read the same file by several lines in ipython, everything is ok, so, I'm pretty sure there is nothing wrong with the jp2 file itself.
so, can anyone help me?
gdal
edited Nov 26 '18 at 14:16
swatchai
3,67221627
asked Nov 26 '18 at 8:18
AaayueAaayue
112
add a comment |
I'm using gdal to read jp2 by lines, here is the code:
def open(self):
if self.ds is None:
self.ds = gdal.Open(self.file_path, gdal.GA_ReadOnly)
self.geo_transform = self.ds.GetGeoTransform()
self.rows = self.ds.RasterYSize
self.cols = self.ds.RasterXSize
def read_strip(self, y_start, read_y_size):
"""
y_start : y in projection coordinate
"""
self.open()
if not self.ds:
raise IOError("Could not open '%s'" % self.file_path)
y_off = int((y_start - self.geo_transform[3]) / self.geo_transform[5])
if y_off < 0 or y_off >= self.rows:
return None
else:
read_y_size_in_data = min(self.rows - y_off, read_y_size)
try:
read_data = self.ds.ReadAsArray(0, y_off, ysize=read_y_size_in_data)
band_data = read_data.astype(float)
self.logger.info('{}, {}, {}'.format(read_y_size, y_off, read_y_size_in_data))
return band_data
except Exception:
self.logger.exception('this file is Nonetype, file: {}'.format(self.file_path))
self.logger.info('{}, {}, {}'.format(read_y_size, y_off, read_y_size_in_data))
self.close()
Here is the error message:
Traceback (most recent call last): File "scene_reader.py", line 62, in read_strip band_data = read_data.astype(float), 'NoneType' object has no attribute 'astype'
Every time I run the code, I did not get any IOError, which means the jp2 file is opened successfully, while the ReadAsArray() got an 'Nonetype' error. by the way, I have tried to just use gdal.Open() and ReadAsArray() to read the same file by several lines in ipython, everything is ok, so, I'm pretty sure there is nothing wrong with the jp2 file itself.
so, can anyone help me?
gdal
edited Nov 26 '18 at 14:16
swatchai
3,67221627
asked Nov 26 '18 at 8:18
AaayueAaayue
112
add a comment |
I'm using gdal to read jp2 by lines, here is the code:
def open(self):
if self.ds is None:
self.ds = gdal.Open(self.file_path, gdal.GA_ReadOnly)
self.geo_transform = self.ds.GetGeoTransform()
self.rows = self.ds.RasterYSize
self.cols = self.ds.RasterXSize
def read_strip(self, y_start, read_y_size):
"""
y_start : y in projection coordinate
"""
self.open()
if not self.ds:
raise IOError("Could not open '%s'" % self.file_path)
y_off = int((y_start - self.geo_transform[3]) / self.geo_transform[5])
if y_off < 0 or y_off >= self.rows:
return None
else:
read_y_size_in_data = min(self.rows - y_off, read_y_size)
try:
read_data = self.ds.ReadAsArray(0, y_off, ysize=read_y_size_in_data)
band_data = read_data.astype(float)
self.logger.info('{}, {}, {}'.format(read_y_size, y_off, read_y_size_in_data))
return band_data
except Exception:
self.logger.exception('this file is Nonetype, file: {}'.format(self.file_path))
self.logger.info('{}, {}, {}'.format(read_y_size, y_off, read_y_size_in_data))
self.close()
Here is the error message:
Traceback (most recent call last): File "scene_reader.py", line 62, in read_strip band_data = read_data.astype(float), 'NoneType' object has no attribute 'astype'
Every time I run the code, I did not get any IOError, which means the jp2 file is opened successfully, while the ReadAsArray() got an 'Nonetype' error. by the way, I have tried to just use gdal.Open() and ReadAsArray() to read the same file by several lines in ipython, everything is ok, so, I'm pretty sure there is nothing wrong with the jp2 file itself.
so, can anyone help me?
gdal
edited Nov 26 '18 at 14:16
swatchai
3,67221627
asked Nov 26 '18 at 8:18
AaayueAaayue
112
I'm using gdal to read jp2 by lines, here is the code:
def open(self):
if self.ds is None:
self.ds = gdal.Open(self.file_path, gdal.GA_ReadOnly)
self.geo_transform = self.ds.GetGeoTransform()
self.rows = self.ds.RasterYSize
self.cols = self.ds.RasterXSize
def read_strip(self, y_start, read_y_size):
"""
y_start : y in projection coordinate
"""
self.open()
if not self.ds:
raise IOError("Could not open '%s'" % self.file_path)
y_off = int((y_start - self.geo_transform[3]) / self.geo_transform[5])
if y_off < 0 or y_off >= self.rows:
return None
else:
read_y_size_in_data = min(self.rows - y_off, read_y_size)
try:
read_data = self.ds.ReadAsArray(0, y_off, ysize=read_y_size_in_data)
band_data = read_data.astype(float)
self.logger.info('{}, {}, {}'.format(read_y_size, y_off, read_y_size_in_data))
return band_data
except Exception:
self.logger.exception('this file is Nonetype, file: {}'.format(self.file_path))
self.logger.info('{}, {}, {}'.format(read_y_size, y_off, read_y_size_in_data))
self.close()
Here is the error message:
Traceback (most recent call last): File "scene_reader.py", line 62, in read_strip band_data = read_data.astype(float), 'NoneType' object has no attribute 'astype'
Every time I run the code, I did not get any IOError, which means the jp2 file is opened successfully, while the ReadAsArray() got an 'Nonetype' error. by the way, I have tried to just use gdal.Open() and ReadAsArray() to read the same file by several lines in ipython, everything is ok, so, I'm pretty sure there is nothing wrong with the jp2 file itself.
so, can anyone help me?
gdal
gdal
edited Nov 26 '18 at 14:16
swatchai
3,67221627
asked Nov 26 '18 at 8:18
AaayueAaayue
112
edited Nov 26 '18 at 14:16
swatchai
3,67221627
asked Nov 26 '18 at 8:18
AaayueAaayue
112
edited Nov 26 '18 at 14:16
swatchai
3,67221627
edited Nov 26 '18 at 14:16
swatchai
3,67221627
edited Nov 26 '18 at 14:16
swatchai
3,67221627
3,67221627
asked Nov 26 '18 at 8:18
AaayueAaayue
112
asked Nov 26 '18 at 8:18
AaayueAaayue
112
asked Nov 26 '18 at 8:18
AaayueAaayue
112
112
add a comment |
add a comment |
1 Answer
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oldest
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I think you have to pick a band, even if it is a single band data set. ds.GetRasterBand(1).ReadAsArray() like that. I always refer to this GDAL API Tutorial which has simple examples.
answered Nov 26 '18 at 15:20
yosukesabaiyosukesabai
4,38611934
add a comment |
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1 Answer
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1 Answer
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active
oldest
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oldest
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active
oldest
votes
I think you have to pick a band, even if it is a single band data set. ds.GetRasterBand(1).ReadAsArray() like that. I always refer to this GDAL API Tutorial which has simple examples.
answered Nov 26 '18 at 15:20
yosukesabaiyosukesabai
4,38611934
add a comment |
I think you have to pick a band, even if it is a single band data set. ds.GetRasterBand(1).ReadAsArray() like that. I always refer to this GDAL API Tutorial which has simple examples.
answered Nov 26 '18 at 15:20
yosukesabaiyosukesabai
4,38611934
add a comment |
I think you have to pick a band, even if it is a single band data set. ds.GetRasterBand(1).ReadAsArray() like that. I always refer to this GDAL API Tutorial which has simple examples.
answered Nov 26 '18 at 15:20
yosukesabaiyosukesabai
4,38611934
I think you have to pick a band, even if it is a single band data set. ds.GetRasterBand(1).ReadAsArray() like that. I always refer to this GDAL API Tutorial which has simple examples.
answered Nov 26 '18 at 15:20
yosukesabaiyosukesabai
4,38611934
answered Nov 26 '18 at 15:20
yosukesabaiyosukesabai
4,38611934
answered Nov 26 '18 at 15:20
yosukesabaiyosukesabai
4,38611934
answered Nov 26 '18 at 15:20
yosukesabaiyosukesabai
4,38611934
4,38611934
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