Hi Alvaro,

Looks like you misinterpret the index file. The index file contains filename, 
offset in the tar file and size for each file in tar file. The filename for 
coverid 14211 will be 0000014211.jpg and that will be in covers_0000_01.tar.

If you want to look at the mapping file, the mapping file is at 

http://www.archive.org/download/ol_dump_2011-03-31/ol_dump_coverids_2011-03-31.txt.gz

It has 4 columns ID-Name, ID-Value, OL-KEY and CoverID.

Anand


On 07-Jun-2011, at 2:01 AM, Sanchez, Alvaro wrote:

> 
> Anand, 
> 
> Thanks for the response.
> For example:
> 
> If I want to retrieve the book cover of a book with ISBN: 0020322208
> I should get this cover
> 
> 
> but the mapping dictates that the cover ID for this book is: 14211 and this 
> cover ID is associated with this cover image 0006000000.jpg
> which is the wrong cover image.
> 
> Any help is appreciated,
> Thanks,
> 
> --Alvaro
> 
> 
> 
> On Jun 3, 2011, at 8:57 PM, Anand Chitipothu wrote:
> 
>> 
>> On 04-Jun-2011, at 12:58 AM, Sanchez, Alvaro wrote:
>> 
>>> Hello, 
>>> 
>>> We have been playing with the covers from OL and we have found that when 
>>> you use the mapping from the ol_dump_coverids file and the separate files 
>>> from the cover images bundles like l_covers_0006_00.index and create the 
>>> relationship for both using the COVER_ID to retrieve the cover image, we 
>>> found we are getting the wrong cover image for that particular book we want 
>>> to retrieve the cover.
>>> Is there anything else that we should know in order to map these?
>> 
>> Can you please let me know one sample book that has the wrong cover mapping?
>> 
>> Anand
>> 
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> 
> Alvaro A. Sanchez
> Emory University
> Phone: 404-712-8346
> Email: [email protected]
> 
> 
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