Media Types

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Introduction

Media types that are supported by iDigBio may have additional derivatives or features available in the iDigBio APIs and web portal. Derivatives may include thumbnail images, wave forms, viewers or players, etc. Other media types may not have those additional features or derivatives and may only display a placeholder thumbnail image or textual media MIME type (if available).

iDigBio encourages the use of IANA media types (formerly MIME types) in the dc:format field where possible. See https://www.iana.org/assignments/media-types/

There are many valid media types that are "unsupported" by iDigBio for the generation of derivatives. We encourage data providers to continue sharing those media since sharing increases discoverability and accessibility to the community.

One of the primary driving factors between "supported" and "unsupported" in the iDigBio file sizes too large to be usable by a wide community, or need special software not commonly installed on computers, etc.


Legend

Each of the media types described on this page will be documented with the following:

Description
Brief description of the media type.
iDigBio short name
A single word that is a shortened name used by iDigBio internally (for example, the "bucket" name), in documentation about a media type, or possibly seen in API parameters.

Examples: "images", "sounds"

Supported formats
A list of known supported file formats in the format that is generally used to describe the format.

Examples: JPEG, JPEG 2000, MP4 (AAC audio)

Common file extensions
The most commonly used file extensions (letters after the last period in a filename) for files of the particular type.

Examples: .jpg, .jp2, .mp4, .stl

Common MIME types
The common MIME types known to be assigned to this media type, derived from the IANA controlling vocabulary of media types: http://www.iana.org/assignments/media-types/media-types.xhtml which is used to populate the dc:format.
Known Unsupported formats
A list of known unsupported file formats in the form that is generally used to describe the format.

Examples: DNG, RAW, PSD, TIFF, GIF

Audubon Core Sample Values
An example of a single media type as it could be represented in Audubon Core.
 "dc:type" : "StillImage"
 "dc:format" : "image/jpeg"
iDigBio derivatives
List of derivatives that iDigBio creates for the media type.

Examples: "thumbnail", "webview", "fullsize".

Media Types

Sounds

Description
Recorded audio or signals such as bird calls, whale song, or electric fish pulses.
iDigBio short name
"sounds"
Supported formats
MP3 (MPEG-1 or MPEG-2 audio), MP4 (AAC audio)
Common file extensions
.mp3, .mp4
Common MIME types
audio/mpeg, audio/MPA, audio/mp4
Known Unsupported formats
WAV
Audubon Core Sample Values
 "dc:type" : "Sound"
 "dc:format" : "audio/mpeg"
iDigBio derivatives
thumbnail, webview, fullsize

Documents

Description
TBD
iDigBio short name
"documents"
Supported formats
Portable Document Format (PDF)
Common file extensions
.pdf
Common MIME types
"application/pdf"
Known Unsupported formats
DOC, DOCX
Audubon Core Sample Values
 "dc:type" : "Text"
 "dc:format" : "application/pdf"
iDigBio derivatives
**** TBD ****

Images

Description
Digital photographs of specimens, labels, sheets
iDigBio short name
"images"
Supported formats
JPEG, JPEG 2000, PNG
Common file extensions
.jpg, .jpeg, .jp2, .png
Common MIME types
image/jpeg, image/jp2, image/png
Known Unsupported formats
DNG, RAW, PSD, TIFF, GIF
Audubon Core Sample Values
 "dc:type" : "StillImage"
 "dc:format" : "image/jpeg"
iDigBio derivatives
thumbnail, webview, fullsize

Models

Description
3D models and meshes representing specimens as polyhedral objects
iDigBio short name
"models"
Supported formats
StereoLithograph (STL, binary), Polygon File Format (PLY, binary)
Common file extensions
STL, PLY
Common MIME types
model/mesh
Known Unsupported formats
**** TBD ****
Audubon Core Sample Values
 "dc:type" : "InteractiveResource"
 "dc:format" : "model/mesh"
iDigBio derivatives
**** TBD ****

Video

Description
Multiple frame capture of moving visual images with possible audio tracks included.
iDigBio short name
"videos"
Supported formats
MP4 (H.264 encoding), MPEG
Common file extensions
.mp4, .mpeg
Common MIME types
video/mp4, video/mpeg
Known Unsupported formats
GIF, DIVX, Adobe Flash (F4V, FLV), Quicktime
Audubon Core Sample Values
 "dc:type" : "MovingImage"
 "dc:format" : "video/mp4"
iDigBio derivatives
**** TBD ****