DRS & Delivery

•Overview
°DRS Policy Guide
•Planning
°DRS Owner FAQ
°NRS Naming
°DRS Billing
•Depositing
°Becoming a depositor
°Batch Builder
°DMart
•Delivery Systems
°Image Delivery
°Page Delivery
°Streaming Delivery
•Web Admin & Maint Systems
•Documentation Center
•Request Forms
•Help & Community

Related Links

Batch queue: prod | qa
DRS owner codes
DRS Web Admin: prod | qa
DRS Web Admin users
DRS depositor's isite
NRS authority paths: prod | qa
PDS Maint: prod | qa

DRS News

18 June 2008
Digital Preservation and Repository Program Update

10 June 2008
Access Management outage on Sunday 6/22

15 May 2008
DRS Loader and DRS Web Admin are back up

15 May 2008
DRS Loader and DRS Web Admin down

30 April 2008
All systems are back: VIA, TED, VC, OASIS (where digital objects

30 April 2008
DRS outage affecting VIA, TED, VC, OASIS (where digital objects arelinked), PDS and SDS

See more News

Image Delivery Service (IDS)

What does the Image Delivery Service offer?
What is the static delivery?
What is the dynamic delivery?
What digital files are required?
Image Delivery Service Documentation

If you need more information or assistance with IDS, contact IDS support staff.

What does the Image Delivery Service offer?

The Image Delivery Service (IDS) delivers digital images that are stored in the Digital Repository Service (DRS) to web browsers. In general, images available through this service have been converted from photographs, slides, prints, and other two-dimensional media held in special collections throughout the University. IDS can secure images to the Harvard community (i.e., those with a Harvard ID number and PIN) when appropriate. The Image Delivery Service has two flavors: static image delivery and dynamic image delivery.

What is static delivery?

Static delivery allows web access to an image in the DRS, similar in functionality to putting an image on a web server. Most commonly used for JPEG and GIF images, this method can deliver any image deposited in the DRS back to an end-user. This service currently delivers many of the digital images described in the VIA catalog, but it can also serve images cataloged in HOLLIS, OASIS, or any other catalog or web site that supports URL linking.

Here's an example.

What is dynamic delivery?

Dynamic delivery allows delivery of many different versions of a particular image, ranging from a thumbnail to beyond a full-size screen image, back to the user from a single file in the DRS. This feature can greatly diminish the number of images deposited in the DRS for the same functionality as static delivery. Dynamic delivery also gives users access to an interactive interface for exploring the image, which includes the ability to zoom, pan and rotate.

Here's an example of four versions of an image: thumbnail, small, medium and large as well as the interactive interface — all rendered dynamically from one file in the repository.

What digital files are required?

Delivery Type File Type Deposited in DRS File Type Delivered to Users
Static JPEG, GIF, TIFF Same as deposited
Dynamic JPEG2000 JPEG

Image Delivery Service Documentation