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Digital Scholarship Lab

Policies

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:

  • Digitizing local, community, and public history items as part of curricular activities
  • Photogrammetry and 3-D modeling of unique items to provide online access to rare or fragile objects
  • Digitizing materials from Special Collections, Rare Books and University Archives to broadly share Butler's unique history and holdings
  • Generating quick-access, high-resolution scans for PALShare and ILL requests
  • Creation of single-use accessible digital copies of print-only materials, where digital copies are unavailable or nonexistent

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

  • Food and beverages are NOT allowed in the Digital Scholarship Lab. They can be left in your bag or placed on an empty table away from equipment and scanning materials.
  • Hands must be washed and dried completely before operating equipment or handling sensitive materials.
  • Please consider your attire when using the scanners to keep damage to the equipment minimal. Unsuitable attire includes:
    • Jackets with metal buttons on sleeves
    • Heavy bracelets, rings
    • Loose or dangling long-sleeve cuffs
    • Long necklaces
  • Remove paperclips, staples and other materials that would scratch the glass while using the flatbed scanners. If such components cannot (or should not) be removed, use the Zeutschel Zeta scanner or the Bookeye scanner instead.
     

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:

  • Crop to interior edge of page (instead of leaving a small border)
  • Deskew along text-reading direction (to improve OCR results)
  • NO color/tone/sharpness corrections

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!

Practices

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:

  • Lossless (saves without compression)
  • Non-proprietary (access to the software needed to open the file cannot be revoked)
  • Widely used (in the case of obsolescence, resources for format conversion will likely be available)

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

  • Do not use spaces, because they are not recognized by some software. Instead use underscores (file_name), dashes (file-name), no separation (filename) or camelcase (FileName).
  • Avoid special characters: ~ ! @ # % ^ & * ( ) ` ; < > ? , [ ] ' " . They are often not recognized by software, and you may be prevented from saving a file with special characters.
  • Make file names informative. Break relevant information into chunks to give yourself an idea of what the file contains.
  • Include a date, if relevant. This makes sure all your files stay in chronological order.
  • Don't make file names too long; longer names are more difficult to read in a directory system and can invite reading errors. Limit file names to 25 characters or less if possible.
  • For sequential numbering, use leading zeroes to ensure files sort properly. For example, use "001, 002...101, etc." instead of "1, 2...101, etc." This ensures your files stay in sequential order.
  • To manage drafts and revision, include a version number in the file name.

Bad examples:

  • asldkfj;(1)
  • my resume
  • final project final FINAL

Good Examples:

  • 2023-2024_Fall_FYS101_Reading03
  • LastName_CV_PositionTitle
  • Thesis_LastName_v03

 

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.

  • Categorize your folders. Group similar files together under the same folder.
  • Use subfolders to organize even more.
  • Do not just leave items in your Downloads folder.

Good examples:

  • Documents > 2023-2024 > Fall > FYS101 > Readings; Projects
  • IR_Contents_backup > Graduate_Scholarship > Graduate Theses > 2023 > LastName01; LastName02; etc.

 

Digital Collections File Naming Schema

Each project is assigned a file naming schema. They will typically follow the format of:

  • Acronym_CollectionName_Box#Folder#_Item#
  • Acronym_CollectionName_YYYYTitle_Type
  • Acronym_CollectionName_YYYY_AuthorName_Type

Examples:

  • BU_JCA_1960MacBeth_Program
  • BU_Thesis_1970_Smith_Thesis
  • BU_Thesis_1970_Smith_License

 

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!

Tips & Tricks

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.

  1. Open your image file in Photoshop (File > Open > [select file])
  2. Add a mask to your layer
    1. In the bottom right corner of the program, click on the layer with the image. There should only be one layer, labeled Background.
    2. Below the layer list, click on the icon that looks like a white rectangle with a transparent or grey circle inside. When you hover over it, it will say Add a mask.
  3. Choose the polygonal lasso tool
    1. On the left side of the program, there is a column of different tools. The lasso tool is the third icon from the top.
    2. Right click the lasso tool and select Polygonal Lasso Tool.
  4. Remove sections of the image
    1. Each click with the polygonal lasso tool creates a new point in the shape. Click along the edges of the area you wish to cut out (e.g. each point in a triangle, several points along a curved edge).
    2. Complete the polygon by clicking near your starting point. A small circle will appear in the corner of the lasso icon on your mouse pointer, signifying that the next click will close the polygon.
    3. Press delete or backspace on your keyboard to remove the area inside the polygon, making it transparent.
  5. Export as PNG (File > Export > Quick Export as PNG > Save file name and location)

Other tips:

  • To discard a polygon line and start over, press escape on your keyboard.
  • To select everything outside the object, when your polygon is complete, right-click and choose "Select Inverse."
  • You may click outside the bounds of the image while creating your polygon. Use this to your advantage to make sure you capture the entire edge, if you're making outer portions of your image transparent.
  • To zoom in and out for easier polygon drawing, use the zoom tool (magnifying glass icon on the left toolbar, or "z" shortcut on keyboard). Toggle between zooming in and zooming out using the + and - magnifying glass buttons near the top of the program.
  • Try using the default lasso tool, magnetic lasso tool, and magic wand tool for complex edges. However, they can be less precise than the polygonal lasso tool.

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 syntax used in the DSL

robocopy "source file path" "destination file path" /e /dcopy:t /r:10 /v /fp /tee /log:filename.log

  • robocopy - tells the command prompt what command we're using
  • source file path - e.g. C:\Users\name\Documents, the location of the files you want to copy
  • destination file path - e.g. C:\Users\name\Pictures\vacation, the location where you want to copy files
  • quotation marks - because some file paths contain spaces, always put your filepaths inside quotation marks so that the command line doesn't get confused
  • /e - copy subfolders, including empty subfolders
  • /dcopy:t - copy timestamps
  • /r:10 - limit copy retries to 10; if robocopy encounters problems while copying (e.g. internet goes out), this helps prevent it from freezing your computer or clogging up your output
  • /v - produces verbose output to a log file, i.e. creates a text record of the process
  • /fp - includes the filepaths in the output
  • /tee - shows the output in the command prompt window, so you can see the progress
  • /log:filename.log - e.g. /log:VacationPhotosCopy.log, names the log file. The log file saves as a text document, usually in C:\Users\name. If you don't specify a file name for your log file, a log file will not be saved.

 

Robocopy Steps
  1. On a Windows computer, open the command prompt
    1. Press the win key or start icon
    2. Search "cmd"
    3. Click on the command prompt app
  2. Type the syntax, copy/pasting your source and destination file paths inside quotation marks
    1. Create the destination folder if not done so already
  3. Press enter
  4. Check that all files were copied and none failed
    1. You should have one skipped directory, and zero failed directories or files. The skipped directory is the destination folder you're copying into. If you specify a folder that does not exist in your destination file path, then robocopy will create the folder in the specified location and you will not have a skipped directory in your results.

CONTACT

Email Butler University Libraries
Irwin Library: 317-940-9227
Science Library: 317-940-9937

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