[GIS] GDAL raster shifting with python error: ‘NoneType’ object has no attribute ‘GetGeoTransform’

coordinate systemgdalraster

I'm trying to shift a georeferenced raster by 0.5m N and 0.5m W in QGIS using the python console:

from osgeo import gdal

# Open in read/write mode
rast_src = gdal.Open('test_raster.tif', 1)

# Get affine transform coefficients
gt = rast_src.GetGeoTransform()

# Convert tuple to list, so we can modify it
gtl = list(gt)
gtl[0] -= 0.5  # Move west 0.5 m
gtl[3] += 0.5 # Move north 0.5 m

# Save the geotransform to the raster
rast_src.SetGeoTransform(tuple(gtl))
rast_src = None # equivalent to save/close

However line #7 (gt = rast_src.GetGeoTransform()) throws an AttributeError: 'NoneType' object has no attribute 'GetGeoTransform'. The installed GDAL version is 1.11.0. The raster seems fine. So what's wrong?

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This same issue happened to me and had nothing to do with the path name. I am able to open the raster OK, but then I find out that the methods that were previously available to me are no longer there . . . enter image description here

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[GIS] ‘NoneType’ object has no attribute

So basically, what this is saying, in Python speak, is that your attempt to open the shapefile failed. When something like osgeo.ogr.Open() fails, it usually returns None, which, in your case, gets assigned to your variable "shapefile". When you try to then access shapefile later, it tells you that shapefile is "NoneType" (rather than the type of object that osgeo would have created) and that NoneType objects don't have the method GetLayerCount.

How do you fix this? First, test for errors in your code - it'll give you better messages. Something like:

import osgeo
import osgeo.ogr
try:
    shapefile = osgeo.ogr.Open("tl_2009_us_state.shp")

    if shapefile: # checks to see if shapefile was successfully defined
        numLayers = shapefile.GetLayerCount()
    else: # if it's not successfully defined
        print "Couldn't load shapefile"
except: # Seems redundant, but if an exception is raised in the Open() call,
    #   # you get a message
    print "Exception raised during shapefile loading"

    # if you want to see the full stacktrace - like you are currently getting,
    # then you can add the following:
    raise

So, now we need to answer the question of why your shapefile isn't loading. My guess is that you need to provide the fully qualified path (ie, "C:\Users...\tl_2009_us_state.shp") because osgeo can't find your shapefile with the path currently provided. That's a hunch though.

[GIS] Polygonize.py: AttributeError: ‘NoneType’ object has no attribute ‘CreateDataSource’

AttributeError: 'NoneType' object has no attribute 'CreateDataSource' means the format -f is incorrect.
Checking the manual : http://gdal.org/ogr/ogr_formats.html , the shape file format is ESRI Shapefile (no underscore).
Try without underscore:

gdal_polygonize.py level200.tif -f "ESRI Shapefile" level200.shp

it works. :)

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[GIS] ‘NoneType’ object has no attribute

[GIS] Polygonize.py: AttributeError: ‘NoneType’ object has no attribute ‘CreateDataSource’

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