Linked Places format extends the GeoJSON standard, principally by providing a "when" element that can be used to temporally scope an entire place record, and/or to any of its asserted names, types, geometries, and relations to other places. See the LPF documentation and spec for more information.
Examples:
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Abingdon (UK) Example from the spec illustrating most of the format's required and optional elements.
A single FeatureCollection with a single feature, titled 'Abingdon (UK)'
The entire Feature is temporally scoped by a "when" element, with both a timespan and multiple references to named periods. Other attributes temporally scoped in this way are names, type (place type), geometry, and relations to other entities.
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Ciudad de Mexico, from the HGIS de las Indias contribution in World Historical Gazetteer. Derived from data of the original project.
A single FeatureCollection with a single feature, titled 'Ciudad de Mexico'
The name 'Mexico' is temporally scoped, as are the single point geometry and five part-of relations to administrative units: the broad territory, a Jurisdiccion, an Audiencia, an Obispado, and a Provincia.