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FAQs

Members' recommendations of digitization services

Created on Friday, 18 June 2010 08:46

Coalition members have a great deal of experience in providing and contracting digitization services.  Although other sources of advice on digitization are more up to date and thorough, recommendations about digitization are frequently sought from the DPC.  In May 2010, staff at the Open University did a rapid survey of recommendations of digitization services used or provided by DPC members.  The resulting list is for information only and may be helpful for those considering digitization: we deemed that it was more useful to publish the results of the survey so that others might use it than simply to keep the results internal, but please note this is not intended as a specific endoresement or recommendation: it is a record of the Open University's helpful research. You may also want to read our report on Digital Preservation and the JISC Digitization Programme.

 

TIFF or JPEG2000?

Created on Wednesday, 27 January 2010 00:00

We are about to launch on a large digitisation project and at the eleventh hour an issue has come up over which format we should be using. The primary purpose of the project is to provide long term backup copies, although obviously once we have the images we can look at additional functionality.

My question, therefore, is whether TIFF is still the best format for long term preservation (this is our current position), or whether JPEG2000 would be a better option. While the general consensus of responses from my posting yesterday seems to be TIFF, there is an element of horizon-scanning and if JPEG2000 is the next big thing, maybe we should just bite the bullet?

 

Simple Checksum Utilities

Created on Monday, 25 January 2010 00:00

I was at the Digital Preservation Road show in Edinburgh on 28th October 09. I heard several speakers insist that if we create or accept digital files part of the process should be running corruption checks with Checksum or Hash software.

I would like to know what free program to download to create the checksum for each file. How best to keep the information -print out or digital file- and how to make a comparison to spot corrupted bits 3 years in the future.

I wonder if you would be kind enough to recommend something not too complicated that we could use. I would be very grateful because I understand it is important but cant find my way through all the programs that spring up when searching on the internet.

   

About these FAQs

These FAQs are derived from discussion on the DPC's various email discussion lists. They demonstrate the benefits of collaboration and show how DPC members are able to draw upon an extended and expert network of individuals and institutions to help resolve their own Digital Preservation challenges. 

We will publish and welcome direct questions of a technical nature which can be answered with specific and detailed answers.  Readers are encouraged to provide responses the questions asked and the answers provided. The advice that we publish in response to direct technical questions is provided as a free and informal service.  Copyright in the answers resides with the authors whose consent should be sought if you intend to copy or publish their advice.  We include the name of the institutions that participants work for because the working context can be a useful tool in understanding an answer.  This freely given advice does not create any liabilities or contracts between institutions or individuals or the DPC.