Media Types
Media types (also known as MIME types) indicate the format of a given file or resource artefact, such as application/pdf for a PDF, or image/png for a PNG image.
Media types for common formats are standardised via the IANA media types registery.
Media types are shown:
in metadata record distribution options, describing the formats a resource can be downloaded as
in data access systems, when resource artefacts (files) are downloaded
Typically these media types will match. Metadata records may use a local media type where additional context can be provided.
Local Media Types
A set of local media types are registered for use within BAS. to provide additional context, or where no suitable IANA media type is available. Wherever possible, local types are based on a broader or cloest matching IANA registered type.
For example the application/pdf+geo local media type is based on the IANA application/pdf type.
These local types are intended for use within metadata records included in the BAS Data Catalogue. They may be used by others for other purposes if useful, but may be changed or removed at any time.
Georeferenced PDF
Zipped GeoPackage
Zipped Shapefile
Follow these steps to create addition media types.
Local Media Types (services)
A set of additional local media types are defined to represent services within distribution options.
This approach is known bad practice but cannot be fixed until services (and service bindings) can be used within the BAS metadata ecosystem.
Esri ArcGIS Feature Service
Esri ArcGIS Vector Tile Service
Esri ArcGIS Hosted Feature Layer
Esri ArcGIS Hosted Vector Tile Layer
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