World Historical Gazetteer supports uploads of both Linked Places format (v1.2 specification) and its delimited file derivative, LP‑TSV, useful for relatively simple data (v0.2 specification). Their specifications provide details, and should be consulted in designing transformations. The following will help in deciding which is appropriate for your dataset. The WHG team is not able to transform data for you, but we can help guide you in this essential step; just let us know via the feedback form.
Linked Places format has been developed as an interconnection standard for place data contributions to the WHG and Pelagios projects, but we expect it to see wider use over time. It is both valid JSON-LD, a syntax of RDF, and valid GeoJSON. It also incorporates temporal extensions to GeoJSON proposed in its precursor GeoJSON-T.
The draft GeoJSON-T format added time to GeoJSON, expressed in "when" elements that can be added at the Feature level, in geometries of a GeometryCollection, in properties, or in the non-standard foreign elements allowed by the GeoJSON specification. It is a work-in-progress (GitHub).
Apart from its JSON-LD structure, the distinctive features of Linked Places format include:
LP-TSV is a delimited file format developed by WHG to support users and contributors whose data is relatively simple. LP-TSV data can be stored in CSV, TSV, or spreadsheet form (the "TSV" is an artifact of an earlier draft). For example, an LP-TSV row can include a timespan for an entire record, but does not permit temporal scoping of individual components (names, geometries, etc.) as the full Linked Places format does.
The distinctive features of LP-TSV include: