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• In production IDS: https://ids.lib.harvard.edu/ids/view/[prod DRS file ID]
  E.g.: https://ids.lib.harvard.edu/ids/view/1639647 

• In qa/test IDS: https://ids-qa.lib.harvard.edu/ids/view/[qa DRS file ID]
  E.g.: https://ids-qa.lib.harvard.edu/ids/view/402065473 

Note: All still images deposited to DRS with role=delivery are automatically assigned a delivery URN that points to an IDS static url. It is recommended that you use the IDS urn to refer to still images in catalog records and web sites.

For example, a static view of still image #1639647 can be delivered using an IDS url or preferably, a persistent IDS urn. The following image links:

https://ids.lib.harvard.edu/ids/view/1639647    
https://nrs.lib.harvard.edu/urn-3:fhcl.hough:408019 

will deliver a static image to the browser:

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• w (width), h (height) in pixels:
  https://ids.lib.harvard.edu/ids/view/50784373?width=1200 (height is calculated proportionally)
  https://ids.lib.harvard.edu/ids/view/50784373?width=150&height=150 (thumbnail-sized)
  https://nrs.lib.harvard.edu/urn-3:rad.schl:14434437?width=150&height=150  (parameter appended to IDS urn)
  
  

• rotation (rotate image 90, 180, or 270 degrees to the right):
  https://ids.lib.harvard.edu/ids/view/452251552?rotation=90 
  https://nrs.lib.harvard.edu/urn-3:hul.guest:37292872?rotation=90 
  
  

• html=y (wraps image within HTML table; disables browser auto-scaling to window size)
  https://ids.lib.harvard.edu/ids/view/50784373?html=y 
  https://nrs.lib.harvard.edu/urn-3:hul.guest:37292872?html=y   
  
  

• Combining parameters:
  https://ids.lib.harvard.edu/ids/view/452251552?rotation=90&width=1000&html=y 
  https://nrs.lib.harvard.edu/urn-3:hul.guest:37292872?rotation=90&width=1000&html=y  
  
  

• buttons=y (displays image in the HL Viewer; can’t be combined with other url parameters)
  https://ids.lib.harvard.edu/ids/view/50784373?buttons=y 
  https://nrs.lib.harvard.edu/urn-3:hul.guest:37292872?buttons=y  
  
  Both links above resolve to this iiif url:
  https://iiif.lib.harvard.edu/manifests/view/ids:50784373 

Linking to a dynamic image in the HL Viewer

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To create a dynamic IDS url, append the buttons=y parameter to a static IDS url or IDS urn, e.g.:

https://ids.lib.harvard.edu/ids/view/1639647?buttons=y     
https://nrs.lib.harvard.edu/urn-3:fhcl.hough:408019?buttons=y   

Below is a screenshot of still image #1639647 displaying in the HL Viewer:

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Notice that the dynamic IDS url resolves to a different url format:
https://iiif.lib.harvard.edu/manifests/view/ids:1639647 

The “iiif.lib.harvard.edu” url is the address of the backend iiif server that provides the HL Viewer user interface. While this address can be bookmarked and is reasonably persistent, it is recommended that permanent links to a dynamic image in a catalog record or web site use the IDS urn, e.g.:

https://nrs.lib.harvard.edu/urn-3:fhcl.hough:408019?buttons=y will resolve to https://iiif.lib.harvard.edu/manifests/view/ids:1639647 

Note that the “iiif.lib.harvard.edu” url format for a dynamic image does not accept IDS url parameters.

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IDS also supports links that conform to the International Image Interoperability Framework (IIIF) Image API.

IIIF is a set of community supported APIs that allow any image viewing application that supports the standard to embed digital image content from any supporting institution in their applications. The HL Viewer for still images uses this API to display highly zoomable images from the DRS.

See Linking to images using the IIIF Image API for more information.

Captions for still images

DRS still image metadata supports creation of a caption -- a brief description that can be displayed with an image. A caption can be defined at deposit or later using Web Admin. See Image Captions for more information. To set image captions in Batch Builder see Adding captions in Batch Builder.

For still images, a caption will always display in the dynamic view (the HL Viewer), in the white bar above the image canvas.

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The default maximum size for images delivered by IDS is 2400 pixels in the largest dimension. But curators can set a lower maximum delivery size for their images on a file-by-file basis. See Image Delivery Size Restriction for more information. To set maximum delivery size in Batch Builder see Adding rights restrictions in Batch Builder.

IDS will respect a lower maximum delivery size when displaying or downloading an image.   

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