Upload and manage digital objects¶
Digital objects objects are computer files that can be uploaded into and displayed by AtoM; they can include scanned images, digital photographs, sound and moving image files, and other scanned or born-digital items. AtoM allows the user to link a single digital object to an archival description or an an authority record, or import multiple digital objects to new lower levels of description. In AtoM, there is a 1:1 relationship between a digital object and an information object - meaning every digital object must be associated with an archival description, typically at the file or item level (see level of description), or an authority record.
For every object uploaded, AtoM creates two derivative objects from the master: a thumbnail image and a reference display copy of the object. The master digital object is the unaltered version of a digital object that has been uploaded to AtoM. Note that only authenticated (i.e. logged-in) users may view master digital objects by default (though this can be changed by editing the permissions of unauthenticated users - for more information, see: Edit permissions).
By default, all users can view the master digital object of an uploaded PDF, regardless of the “View master” settings in the Archival description permissions tab. This is because the reference display copy is not large enough to be useful without access to the full PDF, while the reference copy might be perfectly serviceable for an image (and restricting access to the master may be part of the required copyright conditions). Note that users could still restrict public access to uploaded PDFs using the PREMIS actionable rights module - for more information, see: Rights.
At higher levels of description, the view page of a parent record will include thumbnails of all digital objects registered at lower levels. The thumbnails are displayed using a carousel viewer so you can easily scroll through the set using your mouse or keyboard’s arrow keys. Clicking on a thumbnail will redirect you to the view page for the description associated with that digital object. If more than 10 digital objects appear at lower levels, AtoM will display the first 10 in the carousel and provide a link to a digital object browse page to explore the rest if desired. For more information, see the Carousel entry in Navigation in AtoM.
See below for more information on:
- Linking single digital objects to archival descriptions
- Digital object metadata
- Digital object metadata for preservation files
- Linking single digital objects to authority records
- Uploading multiple digital objects
- Uploading PDFs
- Editing digital objects
- Add dynamic maps to your digital object metadata
- Edit the filename of a digital object linked to an archival description
- Deleting digital objects
- Adding a watermark to reference images
- Digital object storage
- Supported file formats
Digital object metadata¶
An unauthenticated user will not see a digital object and its “Access copies” metadata if the archival description it is attached to has a “draft” instead of “published” status.
Clicking on the “Access copies” subsection label link will collapse or expand the subsection.
The “Access Copies” subsection will include metadata about the “Master file”, “Reference copy”, and “Thumbnail copy” representations of the digital object. Specifically: filename, media type, mime-type, filesize, and uploaded (the timestamp for when the digital object was uploaded to AtoM).
An administrator user can toggle the display of specific “Digital object metadata” section fields on or off in the Admin > Visible elements > Digital object metadata area section. This only affects display for unauthenticated users. Any authenticated users will see all metadata elements in each section as long as those fields contain a value. For more information, see: Visible elements.
If the Reference representation or Thumbnail representation is deleted via the “Edit digital object” page, then the “Reference copy” and/or “Thumbnail copy” metadata is no longer displayed on the archival description view page. Additionaly, the thumbnail is not show on Browse pages and the reference copy is not displayed on view pages.
The filename for each representation is either shown as plain text or as a hyperlink. If it is a hyperlink, it indicates that this user has explicit download permission for this representation.
The icon underneath the “Master file”, “Reference copy”, and “Thumbnail copy” label is coloured black or grey. If it is grey it indicates that the user does not have access to that representation. Note that in the case of unauthorized users, the default setting is to display the reference copy at the top of the archival description view page. Therefore, the icon is coloured black for reference copies by default. However, an explicit hyperlink is not provided in the digital object metadata section for unauthorized users. This is to respect institutional policies around displaying a copyright access statement for downloaded digital materials. That feature only works for Master file representations. See Add a Copyright statement before allowing access to a master digital object.
Access to the “Master file”, “Reference copy”, and “Thumbnail copy” can be configured per user group. The “Access master”, “Access reference”, and/or “Access thumbnail” permission can be set to “Grant” or “Deny” for any user group, including unauthenticated (“anonymous”) users. See: Edit permissions.
Access to the “Master file”, “Reference copy”, and “Thumbnail copy” may be overridden by actionable PREMIS rights configured for individual archival descriptions and their digital object. See Make rights actionable on digital objects. For example, if a PREMIS right is added to an archival description where the “Act” is “Disseminate” and the “Restriction” is “Disallow”, then the hyperlinks in the “Digital object metadata” section are no longer active, all the document icons are coloured grey, and the reference copy of the digital object is no longer displayed on the archival description view page. Instead the customizable text of the “Disallow statement” is displayed at the top of the page as well as in a “Permissions” field for each Access copy representation, e.g. “Access to this record is restricted because it contains personal or confidential information. Please contact the Reference Archivist for more information on accessing this record.”.
If the “Restriction” were to be changed to “Conditional” and the default permission settings are enabled then the “Reference copy” and “Thumbnail copy” become available again on the AtoM template. The customizable text for the “Condition Statement” is displayed in a “Permissions” field for the “Master file” representation, e.g. “This record has not yet been reviewed for personal or confidential information. Please contact the Reference Archivist to request access and initiate an access review.”.
Digital object metadata for preservation files¶
If you or another user of a preservation system (e.g. Archivematica) has sent a DIP upload to an archival description slug in AtoM then thumbnails for the digital objects in that Dissemenation Information Package (DIP) will be displayed in the archival description’s digital object carousel.
An unauthenticated user will not see a digital object and its metadata if the archival description it is attached to has a “draft” instead of “published” status.
When selecting one of the digital objects included in the DIP upload, the “Digital object metadata” section on the archival description view page will include a “Preservation Copies” and “Access Copies” subsection.
When the preservation system uploads a DIP with digital objects to AtoM, it will generate “Master file”, “Reference copy”, and “Thumbnail copy” representations with their metadata displayed in the “Access copies” subsection.
- Clicking on either of these subsection label links will collapse or expand the subsection. See the Digital object metadata above for more about the “Access copies” section.
- The “Preservation Copies” subsection will include metadata about the “Original file” and “Preservation copy” representations that are stored in the preservation system.
If the preservation system did not generate a preservation copy then only the “Original file” section is shown.
The “Preservation copy” metadata includes filename, filesize, and a timestamp for when the preservation system normalized (i.e. transcoded) the preservation copy from the original file.
The “Original file” metadata may include filename, file format name, file format version, format registry key (the unique key assigned to the file format by a format registry), format registry name (e.g. PRONOM), filesize, and ingested (the timestamp for when the preservation system received the original file).
If the preservation action system statement option is enabled, you will also see a “Permissions” field with custom text that is populated by an Administrator user via Admin > Settings > Permissions > Preservation system access statement (e.g. “Access only provided on research room computer”). For more information see Preservation system access statement.
An administrator user can toggle the display of specific “Digital object metadata” section fields on or off via Admin > Visible elements > Digital object metadata area. This only affects display for unauthenticted users. Any authenticated users will see all metadata elements in each section as long as those fields contain a value. For more information, see: Visible elements.
If you are logged in and belong to the “authenticated” group, then you will also see the File UUID and AIP UUID for the Original file. The file UUID is the preservation system’s universally unique identifier for the file and the Archival Information Package (AIP) UUID is the universally unique identifier for the preservation system package which contains the file along with other related files.
If the preservation copies came from the Archivematica preservation system and AtoM has enabled the “arStorageServicePlugin” to allow for AIP download, then users that belong to a group with Download AIP permissions (by default Administrators only) will also see a “Download file” and “Download AIP” link next to each UUID. Clicking on them will fetch the file or the full AIP from the preservation system. See Storage service settings.
If the user has “Download file” and “Download AIP” permissions then the box icon under the “Original file” label will be coloured black. Otherwise it is coloured grey.
By default, access to the preservation copy is only available via the preservation system, therefore the box icon under the “Preservation copy” label is always coloured grey for all users.
Upload multiple digital objects to archival descriptions¶
In AtoM, there is a 1:1 relationship between archival descriptions and digital objects - that is, only one digital object may be associated with an archival description, and all digital objects require an associated description. However, to enable a rapid workflow where users can upload multiple digital objects without first having to create associated descriptions, AtoM includes an option to upload multiple digital objects at once, as children of a selected archival description. Users can choose what level of description is used when the placeholder descriptions are created; a title can also be added to each uploaded digital object, which will then be used as the title for the related description.
The following workflow has been known to fail when using Firefox as your webbrowser. For this particular workflow, we recommend using another browser, such as Chrome.
To upload multiple digital objects in AtoM:
- Navigate to the view page of an existing archival description in AtoM. You can do this by browsing or by searching for a specific archival description - see Access content for more information on navigation in AtoM.
- Click on the “More” button in the button block; from the menu that appears, select “Import digital objects”.
- Select a title for the objects - this will be used as the title for the associated archival description that will be created for each object uploaded. Each object will also have its own title field once selected, but if you do not wish to individually name each object, an automated title can be added to all objects using the title field at the top of the upload page. Currently the default is image 01, image 02, etc. (which will appear as a placeholder (i.e. image %dd%) in the “Title field”).
- Choose a level of description. Unlike the Link a single digital object to an archival description option, which attaches the digital object directly to the archival description at that level, the “Import multiple objects” option requires the user to designate a level of description (e.g.: Fonds, Subfonds, Collection, Series, Subseries, File, Item, Record group, Part, etc). This level of description will be used for the new children that are generated as part of the upload.
For users wishing to include multiple individual images as “views” of a single item, AtoM now includes “Part” as a level of description included at installation.
- Click the blue “Select files” link and select multiple files to upload.
- Once selected, the page will show previews of all the objects. If you like, you can edit the title for each object under to the preview. Remember, the title you enter here will be the title used for the associated archival description that will be created for each digital object uploaded.
- You can quit the upload process at any time by clicking the “Cancel” button in the button block; any digital objects already uploaded will not be saved. Note that simply navigating away from the page by any other means, without first clicking “Import” will also result in no new digital objects being uploaded.
- Click the “Import” button in the button block when you are satisfied with your changes. When you return to the view page, you will see that the objects have all been attached to the archival description as child records of that description. If the digital object Carousel is enabled (see Default page elements for instructions on enabling or disabling the carousel), you will also see the thumbnails of your uploaded digital objects in the carousel.
A user can link a single PDF and import multiple PDFs into AtoM. A full-text search of the content of the PDF is available through the main search box. PDFs that have a text layer will work, including all OCR PDFs and born-digital PDFs that include a text layer (e.g., exported Word documents) will work. Search results will refer users to the PDF that contains the search term(s), but will not reveal the location of the term(s) within the PDF.
Currently, AtoM 2.x truncates PDF text after the first 65,535 bytes.
As mentioned above, it is possible to upload multi-page TIFFs or PDF files to be displayed with a page viewer and to upload each page as a child object of the parent. To enable this feature, see settings.
Otherwise, the process for uploading PDFs is the same as described above.
Edit digital objects¶
To edit a digital object:
- Navigate to the view page of an existing archival description or authority record that has an associated digital object.
- Click on the “More” button in the button block; from the menu that appears, select “Edit digital object”.
- You will be redirected to the digital object’s edit page. On this page, all representations (i.e. master representation, reference representation and thumbnail representation) of the digital object will be listed, along with information on their Filename, Filesize and Media Type.
- The Media type is used by the Media type facet in the search/browse pages - in some cases, AtoM might not properly detect the media type, and you can adjust it here for better results. Values include: Audio, Image, Video, Text, and Other. For more information on filter facets in AtoM, see: Facet filters.
- You can add alternative text to display if the image cannot be displayed in your browser.
- You can also add latitude and longitude values to the Master digital object’s metadata for basic geolocation support. This can configured to display a dynamic Google map in AtoM - for more information, see below:
Edit reference and thumbnail representations¶
- If you wish to use a different image as the thumbnail or reference version this is also performed from the Edit digital object screen. First click delete in Reference representation or Thumbnail area.
- AtoM will ask the user to confirm that they would like to delete the thumbnail/reference image. After confirming, the Edit digital object screen will allow the user to upload a new reference representation by clicking Browse and selecting a file from their computer, or auto-generate a new representation from the master image.
- You can quit the edit process at any time by clicking the “Cancel” button in the button block; any edits made to digital objects will not be saved. Note that simply navigating away from the page by any other means, without first clicking “Save” will also result in no new digital objects being uploaded.
- Once all your changes have been made, click the “Save” button in the button block. You will be redirected back to the archival description’s view page.
All changes made can be edited once again, at any time, by following the steps outlined above.
Add dynamic maps to your digital object metadata¶
To support basic geolocation, AtoM has the ability to associate latitude and longitude coordinates with a digital object. If desired, you can also display a dynamic Google map in the digital object metadata area showing the location of the coordinates. To do so, an administrator will first need to configure certain settings so the map can be visible.
Enabling the display of digital object maps
You can request a Google Maps API key free of charge - all you need is a Google account. For more information, see:
Additionally, in Admin > Settings > Default page elements, the “Digital obect map” setting checkbox must be checked. Remember to save your changes in the Settings area!
For more information, see:
Adding latitude and longitude values to a digital object
Once the above settings are configured, then any time a digital object has latitude and longitude values added to it, it will display a dynamic, zoomable map in the Digital object metadata area. To add your latitude and longitude values to an existing digital object (Examples show this process for archival description - the instructions are the same for authority record):
- Navigate to the archival description or authority record linked to the digital object you want to edit. You can do this by searching or browsing - for more information on navigation in AtoM, see: Access content.
- When you are on the view page of the related description, scroll down the button block at the bottom of the page, and in the “More” menu, select “Edit digital object”
- AtoM will redirect you to the edit page for the digital object. In the information area for the master digital object, add your latitude and longitude values to the fields provided.
For all latitude and longitude fields in AtoM, you need to use the Signed degrees format (e.g. DDD.dddd) for the data to work! Degree and cardinal based formats (e.g. DDD MM SS + compass direction) will not work and the map will not be generated properly.
When only one field is provided, latitude values should be entered first, followed by a comma before the longitude values.
Here is an example of the latitude and longitude for Vancouver, BC, Canada:
Correct format: (signed degrees)
- 49.246292, -123.116226
Will not work in AtoM: (DMS cardinal)
- 49° 14’ 46.6512” N, 123° 6’ 58.4136” W
- When you save the record, AtoM will return you to the archival description’s view page. In the Digital object metadata area, you should now see a Google map showing your coordinates with a pin. You can zoom, pan, change the map type, and clik to view a full Google map in a new tab.
Not sure how to find out the coordinates of a location? You can use Google maps!
Find your location on a map - zoom in to make it as precise as possible. If you right-click and select the “What’s here?” option that will appear in the context menu that appears, Google Maps will display the latitude and longitude values, along with any addtional information it has:
You can then use this information in AtoM following the steps described above!
Delete digital objects¶
- Navigate to the view page of an existing archival description or authority record that has an existing digital object.
- Click on the “More” button in the button block; from the menu that appears, select “Edit digital object”. You will be redirected to the digital object’s edit page.
- Scroll to the bottom of the page and click “Delete”. You will be prompted to confirm that you wish to “Delete” the digital object; click “Delete” once again. You will be redirected to the archival description’s view page.
Adding a watermark to reference images¶
A system administator can place a watermark file in AtoM’s root directory, so a digital watermark is overlayed over all reference display copy images generated when a digital object is uploaded.
For more information, see the Administrator’s manual:
Digital object storage¶
In AtoM, administrators can track digital object storage per repository. Storage limits may be placed on individual repositories by in-house server capacity or on hosted server agreements.
If you are utilizing a multi-institutional / portal instance of AtoM, you will need to check with the site administrator to learn the digital object storage limitations.
For more information, see Managing digital object storage.
A number of file formats are supported as digital objects in AtoM. Files in other formats can still be uploaded to AtoM; they just cannot be directly accessed or streamed within AtoM itself. In these cases the user must download the file from AtoM to his or her desktop and (assuming the user has the requisite software) access the content there.
The table below shows image, audio and video formats which can be viewed in AtoM:
|GIF||Apple Lossless||CamStudio CSCD|
|JPEG||Cook Codec||Creative YUV (CYUV)|
|V.Flash PTX||EA ADPCM||DNxHD|
|SGI||FLAC||Flash Screen Video|
|Sun Rasterfile||Intel Music Coder||FFV1|
|Nellymoser Asao Codec in Flash||Huffyuv|
|QDM2||id Software RoQ Video|
|RealAudio 1.0||Intel Indeo 2|
|RealAudio 2.0||Intel Indeo 3|
|TXD||MPEG-4 Part 2|
|Vorbis||Apple Computer QuickDraw|
|WavPack||Quicktime Graphisc SMC|
|Windows Media Audio 1||RealVideo RV10|
|Windows Media Audio 2||RL2|
|Westwood Studios VQA|
|Microsoft WMV v 7, 8 and 9|
|Wing Commander/Xan Video|
AtoM uses FFmpeg to handle audio-visual files. The table above shows the file formats supported by FFmpeg.