Copyright
All digitization activities MUST comply with Butler University Libraries' copyright policy. New users must include a copyright consultation during their first appointment at the Lab. Butler University Library faculty and staff are not lawyers, and cannot provide legal advice.
Teaching-centered Philosophy
We aim to teach the skills necessary to engage with digital scholarship. Therefore, we provide training, consultation, and supervision--rather than fulfill drop-off scanning requests. However, library student employees are trained on lab procedures, so if you have ideas for a project, we encourage you to reach out to the Lab to see if it's feasible!
If you would like to make a request for an ebook, digital chapter, or article, please visit the Butler Libraries homepage or reach out to your liaison librarian.
Prioritizing Scholarly Inquiry
The Digital Scholarship Lab prioritizes projects that center or support scholarly inquiry. Such projects may include but are not limited to:
We encourage you to use existing Open Access, licensed, and/or controlled digital lending options before choosing to create copies of articles or book chapters for classroom use. Such requests MUST include a copyright consultation. Check out our other LibGuides for more info on these awesome (and effort-saving) resources!
Safety and Proper Use of Equipment
Handling Fragile Materials, or Materials from Special Collections and Archives
The Digital Scholarship Lab operates with the best practices outlined by the Federal Agencies Digitization Guidelines Initiative (FADGI) in mind. The work is also informed by related materials including the Library of Congress Sustainability of Digital Formats descriptions and Preserving (Digital) Objects With Restricted Resources (POWRR).
It is the current standard at Butler University Libraries to perform the following alterations when creating the production master image file:
Staff are available to discuss your post-processing needs on a project-by-project basis.
Saving Your Files
Don't forget to save your files before you leave! We recommend bringing in a USB flash drive to transfer your files, but small projects can be saved locally and emailed or uploaded to your Google Drive, Dropbox, etc. To ensure enough space for the next user's project, older images and files will be periodically deleted without notice. Also, check out our tips on file organization -- see below!
The Digital Scholarship Lab can help you understand and choose which file formats are right for your project.
File Purpose | File Type |
Archival Master (AM) | TIFF, RAW |
Production Master (PM) | TIFF, PDF/A-2b, JPEG2000 |
Delivery Copy (DC) | JPEG, PDF |
Digital preservation is concerned with the long-term usability of digital files. It is important to be able to store, open, or otherwise reliably reproduce a file as it was originally created. Therefore, a best-practice master file format is:
An archival master (AM) image is the one that is initially created during scanning, without any alterations. In other words, it should not be cropped, deskewed, adjusted for color, tone, sharpness, etc. In many cases, a small border should be left around all sides of an object to convey that the entire page was scanned.
A production master (PM) image is as-good-as an archival master (AM) file, in terms of lossless compression and resolution. However, we allow some alterations to be saved. These alterations are made to make the image more presentable, like cropping to the edge of the page for a consistent look, deskewing a page so the text is easier to read, and applying optical character recognition (OCR) to make it text-searchable.
A delivery copy (DC) image may be compressed to reduce file size, which makes uploading, downloading and sharing much easier.
Typically a digitization project produces all three categories (AMs, PMs, DCs) of files, but only in digital preservation contexts are we interested in saving AMs and PMs. If your project is not archival in nature (e.g. you are making a reference copy or only using the material for a single semester), perhaps you may only decide to save the delivery copy. During your project consultation, we'll discuss which of these are appropriate to keep for your project.
General File Naming Best Practices
Bad examples:
Good Examples:
General Folder Organization Best Practices
While there's no right or wrong way to organize file folders on your computer, some organization can keep files easy to find, so that you don't have to rely on your computer's search function.
Good examples:
Digital Collections File Naming Schema
Each project is assigned a file naming schema. They will typically follow the format of:
Examples:
Type of Material | Suggested DPI/PPI |
---|---|
Bound volumes - General and Special Collections | 400 ppi |
Unbound - Manuscripts, Special Materials, General Collections | 400 ppi |
Unbound Modern Textual Records | 300 ppi |
Oversized Items - Maps, Posters, Other Materials | 400 ppi |
Newspapers (print) | 400 ppi |
Microfilm and Transparencies smaller than 4" x 5" | 4000 ppi |
Microfilm and Transparencies larger than 4" x 5" | 2000 ppi |
Art Prints and Photographs | 600 ppi |
What is DPI? What is PPI? What's the difference?
DPI stands for dots per inch, and measures resolution in printing. PPI stands for pixels per inch and measures resolution in digital images. PPI is the correct technical term when discussing resolution in a digitization context, but DPI is also used colloquially.
What is resolution and why does it matter?
Resolution (as measured by PPI) describes the level of spatial detail in a digital image (such as a JPEG or TIFF). A high resolution image shows more detail than a low resolution one. However, high resolution also results in larger file sizes. An appropriate resolution will balance capturing meaningful details and keeping file sizes manageable.
Why does suggested PPI vary based on material type?
Simply put, you need to capture more detail in some formats than others.
Think of a polaroid photograph next to a printed copy of a syllabus. If you were to scan both to refer to later, you'd probably want to zoom in and see all the little details in the photograph, whereas you might only be interested in clearly reading the words on the syllabus. That's why we'd scan the photograph at 600 ppi and the modern textual record (syllabus) at 300 ppi, unless otherwise specified.
Print materials from Special Collections, Rare Books, and University Archives are typically scanned at 400 ppi. This includes bound materials like books and looseleaf materials like pamphlets. This resolution allows us to capture details like paper texture and clear letters while not creating files that are too large. Because most of these are text-based, we don't risk losing much detail by not scanning at 600 ppi.
Why is microfilm scanned at such high resolutions? Well, it's micro! Microfilm is usually only 35mm, or just an inch or so wide. We need far more than 300, or even 600 pixels to capture those tiny details.
Lastly, these numbers come from the Federal Agencies Digitization Guidelines Initiative (FADGI) Third Edition, published May 2023. See the Best Practices tab above for more information.
Quick start guides are on their way... in the meantime, if you need assistance operating the equipment in the lab, please set up a consultation via the LibCal reservation system!
Need to make sections of your image transparent? Follow the steps below. Photoshop is available on lab computers across campus, including in the Digital Scholarship Lab in Irwin Library.
Other tips:
Need to reliably move or copy lots of files while maintaining metadata, timestamps, permissions, etc.? You can use the windows-native command-line file copy utility, Robust File Copy (Robocopy) to move files faster and more securely than copy/paste.
For a full explanation of Robocopy's parameters, check out the article linked below.
robocopy "source file path" "destination file path" /e /dcopy:t /r:10 /v /fp /tee /log:filename.log
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