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June 1, 2020 20:42
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Represent 4 ways to represent spatial in JSON-LD
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| { | |
| "@context": { | |
| "@version": 1.1, | |
| "geoblob": { | |
| "@id": "http://example.com/vocab/json", | |
| "@type": "@json" | |
| }, | |
| "rdf": "http://www.w3.org/1999/02/22-rdf-syntax-ns#", | |
| "rdfs": "http://www.w3.org/2000/01/rdf-schema#", | |
| "xsd": "http://www.w3.org/2001/XMLSchema#", | |
| "description": "http://igsn.org/core/v1/description", | |
| "geosparql": "http://www.opengis.net/ont/geosparql#", | |
| "schema": "https://schema.org/" | |
| }, | |
| "@id": "https://samples.earth/id/do/bqs2dn2u6s73o70jdup0", | |
| "@type": "http://igsn.org/core/v1/Sample", | |
| "description": "A fake ID for testing", | |
| "schema:subjectOf": [ | |
| { | |
| "schema:url": "https://samples.earth/id/do/bqs2dn2u6s73o70jdup0.geojson", | |
| "@type": "schema:DigitalDocument", | |
| "schema:format": [ | |
| "application/vnd.geo+json" | |
| ], | |
| "schema:conformsTo": "https://igsn.org/schema/spatial.schema.json" | |
| } | |
| ], | |
| "geosparql:hasGeometry": { | |
| "@id": "_:N98e75cacc29f40deb555eb583cb162dc", | |
| "@type": "http://www.opengis.net/ont/sf#Point", | |
| "geosparql:asWKT": { | |
| "@type": "http://www.opengis.net/ont/geosparql#wktLiteral", | |
| "@value": "POINT(-76 -18)" | |
| }, | |
| "geosparql:crs": { | |
| "@id": "http://www.opengis.net/def/crs/OGC/1.3/CRS84" | |
| } | |
| }, | |
| "geoblob": { | |
| "type": "GeometryCollection", | |
| "geometries": [{ | |
| "type": "Point", | |
| "coordinates": [-76, -18] | |
| }] | |
| }, | |
| "schema:spatialCoverage": { | |
| "@type": "schema:Place", | |
| "schema:geo": { | |
| "@type": "schema:GeoCoordinates", | |
| "schema:latitude": -18, | |
| "schema:longitude": -76 | |
| } | |
| } | |
| } |
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Here's s slight revision of the code. Adds a dcat:conformsTo link to a profile specification for conventions on how the "http://igsn.org/core/v1/Sample" type is actually implemented in this doc. Use rdfs label and description since they are more general than the schema.org entities. Uses schema:about to link to a JSON doc with sample location. Invent a local namespace 'igsn' for the sample description profile, and an igsn:sampleLocation property of core/sample, whose value is an array of different representations of the sample location. Note the example doesn't handle the vertical extent of the core sample. the Geoblob keys need a namespace don't they?