LDIO GeoJson To WKT Transformer

Ldio:GeoJsonToWktTransformer

The GeoJson to Wkt Transformer will transform any GeoJson statements (with predicate https://purl.org/geojson/vocab#geometry) to a wkt string.

When the transform-to-rdf+wkt-enabled configuration is enabled, GeoJSON statements will be converted into RDF+WKT format.

For example:

{
  "https://purl.org/geojson/vocab#geojson:geometry": {
    "@type": "Point",
    "https://purl.org/geojson/vocab#geojson:coordinates": [
      100.0,
      0.0
    ]
  }
}

becomes:

{
  "http://www.w3.org/ns/locn#geometry": {
    "@value": "POINT (100 0)",
    "@type": "http://www.opengis.net/ont/geosparql#wktLiteral"
  }
}

With transform-to-rdf+wkt-enabled set to true it becomes:

@prefix geojson: <https://purl.org/geojson/vocab#> .
@prefix sf: <http://www.opengis.net/ont/sf#> .
@prefix geo: <http://www.opengis.net/ont/geosparql#> .
@prefix locn: <http://www.w3.org/ns/locn#> .

<http://example.com/features/point>
        a       geojson:Feature;
        locn:geometry
                [ a       sf:Point;
                  geo:asWKT
                          "POINT (100 0)"^^geo:wktLiteral
                ] .

Config

Property	Description	Required	Default	Example	Supported values
transform-to-rdf+wkt-enabled	Transform GeoJson to RDF+WKT format, defaults to false and the default format is WKT	No	false	false	true/false