Caring for Digital Materials Webinar 4: Backups, Copies, and What Can Go Wrong

Video Published on 2 Sep 2015
Digital disasters happen every day. Computer hard drives fail, viruses corrupt or erase digital files, and mother nature sometimes reminds us that water and electricity don’t mix. This session will focus on policies that can help you recover from these disasters, such as making copies of your digital files and storing them in multiple locations.

Seeking Comment on Migration Checklist | The Signal

The NDSA Infrastructure Working Group’s goals are to identify and share emerging practices around the development and maintenance of tools and systems for the curation, preservation, storage, hosting, migration, and similar activities supporting the long term preservation of digital content. One of the ways the IWG strives to achieve their goals is to collaboratively develop and publish technical guidance documents about core digital preservation activities. The NDSA Levels of Digital Preservation and the Fixity document are examples of this.

OverDrive Working on PDF Conversion, Faster Cloud-based Platform | Library Journal

OverDrive is working on a project that could ultimately enable the company to convert PDFs and other file formats into the industry-standard EPUB format for ebooks, without significant loss of formatting and functionality, CEO Steve Potash said during his “Crystal Ball” presentation, which concluded the company’s biennial Digipalooza user group conference in Cleveland, OH earlier this month.

Format Migrations at Harvard Library: An NDSR Project Update | The Signal

As has been famously outlined by the Library of Congress on their website on sustainability factors for digital formats, digital material is just as susceptible to obsolescence as analog formats. Within digital preservation there are a number of strategies that can be employed in order to protect your data including refreshing, emulation or migration, to name a few. As the National Digital Stewardship Resident at Harvard Library, I am responsible for developing a format migration framework which can be continuously adapted for migration projects at Harvard.

American scientists unearth lost 1960s polar satellite images worth billions | Barentsobserver

David Gallaher was eight years old in 1964, watching satellites twinkling high overhead. That year, the first American to orbit the planet left NASA, the Soviets put the first multi-person crew in orbit, and one tiny satellite, Nimbus 2, was taking grainy black-and-white images of the entire surface of the planet.
Seventeen years before the start of what we know as the “modern satellite record” of sea ice, Nimbus series satellites were snapping images that would turn up on two huge pallets in Gallaher’s office in Colorado 50 years later.

To standardise or not: is normalisation of video a thing of the past? | Presto Centre

This recorded webinar will examine the question of whether it makes sense to produce a standardised copy of a digital video file for preservation within the context of collections of video artworks. In the world of digital video tape, this was done to provide a safety copy, often to provide a more robust uncompressed version and also to streamline future migration.

An Analysis of Contemporary JPEG2000 Codecs for Image Format Migration | Scape

This paper presents results of an analysis of different implementations of the JPEG2000 standard, specifically part 1: JP2, an image format that is currently popular within the digital preservation community. In particular we are interested in the effect different JPEG2000 codecs (encoders and decoders) have on image quality in response to lossy compression. We focus on three main codec libraries for analysis – Kakadu, JasPer and OpenJPEG – migrating 932 TIFF newspaper images to lossy JPEG2000 files using 2:1 and 4:1 compression ratios, and monitor image quality using PSNR.

Quality assured image file format migration in large digital object repositories | Scape

This article gives an overview on how different components developed by the SCAPE project are intended to be used in composite file format migration workflows; it will explain how the SCAPE platform can be employed to make sure that the workflows can be used to migrate very large image collections and in which way the integration with a digital object repository is intended.

QC — and long-term archiving experience

During the digitisation of legacy archive material at ORF, the Austrian public-service broadcaster, hundreds of thousands of video cassettes will need to be converted to digital file formats over the next decade. To guarantee the sustainable usability of this file-based material, thoroughly-planned guidelines for Quality Control (QC) have to be worked out. Although some QC tools already exist, their detailed parameter settings as well as the exact requirements to test against, have not yet been determined and will be the main focus of the EBU QC group.

Guidelines for legacy repository migration

Universidade do Minho - Several institutions are currently running long-term digital repositories that have been in operation for several years now. Some of these systems are approaching the end of their life spans and will soon be replaced by the next-generation of long-term digital repository systems. This will unavoidably imply the migration of millions of files, metadata records and terabytes of data from the legacy repository to the newly adopted one. Because of the large scale of this operation, this procedure needs careful planning, validation and support.