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Python problem using GDAL

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0

1

I used the instructions at https://pythongisandstuff.wordpress.com/2011/07/07/installing-gdal-and-ogr-for-python-on-windows/

I downloaded the following files:

• GDAL-1.11.1.win-amd64-py2.7.msi


• gdal-111-1800-x64-core.msi

Then I followed the above instructions. When I type

from osgeo import gdal

at the Python IDLE command line, everything appears to be OK. Then I type in

ds = gdal.Open( 'C:/testfile.DT1')

and again, it appears to be OK. However, when I type in

gt = ds.GetGeoTransform()

I get the following error message:

Traceback (most recent call last):

  File "<pyshell#3>", line 1, in <module>

    gt = ds.GetGeoTransform()

AttributeError: 'NoneType' object has no attribute 'GetGeoTransform'

I have checked the DTED file and there is nothing wrong with it. I also tried the above with a tif and got the same result. I can get the GDAL executables to run, but not the GDAL Python scripts. Is there something that I should check regarding my install of GDAL?

gdal python-2.7

share|improve this question

edited Jul 17 '15 at 19:11

Chris W

14.8k22344

asked Jul 17 '15 at 18:52

Renee CammarereRenee Cammarere

635618

bumped to the homepage by Community♦ 2 mins ago

This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.

• 
  
  
  

  
  6
  

  
  
  
  
  
  

  
  
  If gdal can't open your file for some reason it just returns None instead of raising an exception. To see the error, call gdal.UseExceptions() before attempting to open the file
  
  – user2856
  Jul 17 '15 at 23:08
  

  
  
  
  


• 
  
  
  

  
  3
  

  
  
  
  
  
  

  
  
  the gdal.Open method returns None if no dataset is found, for some reason the dataset is invalid or GDAL can't open it. Try GDALinfo on the dataset to see if it's valid or incomplete/corrupt. As @Luke said, set the UseExceptions to find out what the error is. Is your python 64 bit as well? You can't mix 64/32 bit. Do you have more than one python install? Is your GDAL environment set up properly? (trac.osgeo.org/gdal/wiki/ConfigOptions) is DTED a core driver or do you need to get that separately?
  
  – Michael Stimson
  Jul 18 '15 at 0:12
  
  
  

  
  
  
  

add a comment | 

0

1

I used the instructions at https://pythongisandstuff.wordpress.com/2011/07/07/installing-gdal-and-ogr-for-python-on-windows/

I downloaded the following files:

• GDAL-1.11.1.win-amd64-py2.7.msi


• gdal-111-1800-x64-core.msi

Then I followed the above instructions. When I type

from osgeo import gdal

at the Python IDLE command line, everything appears to be OK. Then I type in

ds = gdal.Open( 'C:/testfile.DT1')

and again, it appears to be OK. However, when I type in

gt = ds.GetGeoTransform()

I get the following error message:

Traceback (most recent call last):

  File "<pyshell#3>", line 1, in <module>

    gt = ds.GetGeoTransform()

AttributeError: 'NoneType' object has no attribute 'GetGeoTransform'

I have checked the DTED file and there is nothing wrong with it. I also tried the above with a tif and got the same result. I can get the GDAL executables to run, but not the GDAL Python scripts. Is there something that I should check regarding my install of GDAL?

gdal python-2.7

share|improve this question

edited Jul 17 '15 at 19:11

Chris W

14.8k22344

asked Jul 17 '15 at 18:52

Renee CammarereRenee Cammarere

635618

bumped to the homepage by Community♦ 2 mins ago

This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.

• 
  
  
  

  
  6
  

  
  
  
  
  
  

  
  
  If gdal can't open your file for some reason it just returns None instead of raising an exception. To see the error, call gdal.UseExceptions() before attempting to open the file
  
  – user2856
  Jul 17 '15 at 23:08
  

  
  
  
  


• 
  
  
  

  
  3
  

  
  
  
  
  
  

  
  
  the gdal.Open method returns None if no dataset is found, for some reason the dataset is invalid or GDAL can't open it. Try GDALinfo on the dataset to see if it's valid or incomplete/corrupt. As @Luke said, set the UseExceptions to find out what the error is. Is your python 64 bit as well? You can't mix 64/32 bit. Do you have more than one python install? Is your GDAL environment set up properly? (trac.osgeo.org/gdal/wiki/ConfigOptions) is DTED a core driver or do you need to get that separately?
  
  – Michael Stimson
  Jul 18 '15 at 0:12
  
  
  

  
  
  
  

add a comment | 

I used the instructions at https://pythongisandstuff.wordpress.com/2011/07/07/installing-gdal-and-ogr-for-python-on-windows/

I downloaded the following files:

• GDAL-1.11.1.win-amd64-py2.7.msi


• gdal-111-1800-x64-core.msi

Then I followed the above instructions. When I type

from osgeo import gdal

at the Python IDLE command line, everything appears to be OK. Then I type in

ds = gdal.Open( 'C:/testfile.DT1')

and again, it appears to be OK. However, when I type in

gt = ds.GetGeoTransform()

I get the following error message:

Traceback (most recent call last):

  File "<pyshell#3>", line 1, in <module>

    gt = ds.GetGeoTransform()

AttributeError: 'NoneType' object has no attribute 'GetGeoTransform'

I have checked the DTED file and there is nothing wrong with it. I also tried the above with a tif and got the same result. I can get the GDAL executables to run, but not the GDAL Python scripts. Is there something that I should check regarding my install of GDAL?

gdal python-2.7

share|improve this question

edited Jul 17 '15 at 19:11

Chris W

14.8k22344

asked Jul 17 '15 at 18:52

Renee CammarereRenee Cammarere

635618

Traceback (most recent call last):

  File "<pyshell#3>", line 1, in <module>

    gt = ds.GetGeoTransform()

AttributeError: 'NoneType' object has no attribute 'GetGeoTransform'

share|improve this question

edited Jul 17 '15 at 19:11

Chris W

14.8k22344

asked Jul 17 '15 at 18:52

Renee CammarereRenee Cammarere

635618

share|improve this question

edited Jul 17 '15 at 19:11

Chris W

14.8k22344

asked Jul 17 '15 at 18:52

Renee CammarereRenee Cammarere

635618

edited Jul 17 '15 at 19:11

Chris W

14.8k22344

edited Jul 17 '15 at 19:11

Chris W

14.8k22344

asked Jul 17 '15 at 18:52

Renee CammarereRenee Cammarere

635618

asked Jul 17 '15 at 18:52

Renee CammarereRenee Cammarere

635618

1 Answer
1

active

oldest

votes

0

Maybe try to open like this:

from osgeo import gdal

driver = gdal.GetDriverByName( ’DTED’)

driver.Register()

file = gdal.Open( ’path/to/file’)

You may have to register your driver, in this case DTED.

share|improve this answer

edited Jul 18 '15 at 5:00

Michael Stimson

21.8k22460

answered Jul 17 '15 at 19:00

dmh126dmh126

4,90421431

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks for this answer. However, I got the same resulting error.
  
  – Renee Cammarere
  Jul 17 '15 at 19:33
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  So maybe your path to file is wrong. Try: C:\testfile.dt1. A backslash instead of a slash.
  
  – dmh126
  Jul 17 '15 at 19:37
  
  
  

  
  
  
  


• 
  
  
  

  
  3
  

  
  
  
  
  
  

  
  
  All drivers in the library are registered with from osgeo import gdal No need to register anything, unless you've deregistered.
  
  – user10353
  Jul 17 '15 at 21:32
  
  
  

  
  
  
  

add a comment | 

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0

Maybe try to open like this:

from osgeo import gdal

driver = gdal.GetDriverByName( ’DTED’)

driver.Register()

file = gdal.Open( ’path/to/file’)

You may have to register your driver, in this case DTED.

share|improve this answer

edited Jul 18 '15 at 5:00

Michael Stimson

21.8k22460

answered Jul 17 '15 at 19:00

dmh126dmh126

4,90421431

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks for this answer. However, I got the same resulting error.
  
  – Renee Cammarere
  Jul 17 '15 at 19:33
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  So maybe your path to file is wrong. Try: C:\testfile.dt1. A backslash instead of a slash.
  
  – dmh126
  Jul 17 '15 at 19:37
  
  
  

  
  
  
  


• 
  
  
  

  
  3
  

  
  
  
  
  
  

  
  
  All drivers in the library are registered with from osgeo import gdal No need to register anything, unless you've deregistered.
  
  – user10353
  Jul 17 '15 at 21:32
  
  
  

  
  
  
  

add a comment | 

0

Maybe try to open like this:

from osgeo import gdal

driver = gdal.GetDriverByName( ’DTED’)

driver.Register()

file = gdal.Open( ’path/to/file’)

You may have to register your driver, in this case DTED.

share|improve this answer

edited Jul 18 '15 at 5:00

Michael Stimson

21.8k22460

answered Jul 17 '15 at 19:00

dmh126dmh126

4,90421431

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks for this answer. However, I got the same resulting error.
  
  – Renee Cammarere
  Jul 17 '15 at 19:33
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  So maybe your path to file is wrong. Try: C:\testfile.dt1. A backslash instead of a slash.
  
  – dmh126
  Jul 17 '15 at 19:37
  
  
  

  
  
  
  


• 
  
  
  

  
  3
  

  
  
  
  
  
  

  
  
  All drivers in the library are registered with from osgeo import gdal No need to register anything, unless you've deregistered.
  
  – user10353
  Jul 17 '15 at 21:32
  
  
  

  
  
  
  

add a comment | 

Maybe try to open like this:

from osgeo import gdal

driver = gdal.GetDriverByName( ’DTED’)

driver.Register()

file = gdal.Open( ’path/to/file’)

You may have to register your driver, in this case DTED.

share|improve this answer

edited Jul 18 '15 at 5:00

Michael Stimson

21.8k22460

answered Jul 17 '15 at 19:00

dmh126dmh126

4,90421431

from osgeo import gdal

driver = gdal.GetDriverByName( ’DTED’)

driver.Register()

file = gdal.Open( ’path/to/file’)

share|improve this answer

edited Jul 18 '15 at 5:00

Michael Stimson

21.8k22460

answered Jul 17 '15 at 19:00

dmh126dmh126

4,90421431

edited Jul 18 '15 at 5:00

Michael Stimson

21.8k22460

edited Jul 18 '15 at 5:00

Michael Stimson

21.8k22460

answered Jul 17 '15 at 19:00

dmh126dmh126

4,90421431

answered Jul 17 '15 at 19:00

dmh126dmh126

4,90421431