This idea is posted here to get feedback of the Omeka S community. Is this a user story you can relate to? Is the described functionality not already present in an existing Omeka S module? Is the description/requirements clear enough (in order for a developer to work on a module)?
I’d like to have the the metadata of items (with geographic property/mapping) in an item set available in GeoJSON format in order to make visualizations.
In Omeka S, an item set is a feature that allows users to organize related items into collections or groups. It is commonly used by cultural institutions like museums and libraries to curate and present digital content around specific themes, projects, or exhibitions. Item sets facilitate the creation of cohesive narratives and structured presentations by bringing together various types of content, such as images, videos, texts, and metadata records, in a single, organized unit. Items can have geographic properties, like
geo:asWKT or a location (via the Omeka S Mapping module).
Examples (proof of concept)
The Gouda Timemachine has the locations of (current and disappeared) mills in the Dutch town of Gouda (via the Mapping module). The data is organised in item set 92174. When I request https://www.goudatijdmachine.nl/geojson/92174 I get the information in GeoJSON format. Visualizing the GeoJSON example with a generic viewer: HERE XYZ: GeoJSON Visualizer
- Per item in the itemset, the informative (title/identifier) and geographic metadata (mapping/geo:asWKT) have to be mapped to GeoJSON properties in a Feature to form a FeatureCollection.
- Geographical information in WKT format should be converted to GeoJSON (in the proof-of-concept GitHub - phayes/geoPHP: Advanced geometry operations in PHP was used for this conversion)
- Generated GeoJSON should be cachable (can become big in size)