Python problem using GDAL

Question

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?

Answer 1

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.