Add GeoJSON-LD example

Author: sgillies

geojson-ld.md

@@ -3,11 +3,11 @@ layout: home
 title: GeoJSON-LD
 ---
 
-# GeoJSON-LD
+# GeoJSON-LD 1.0
 
 A vocabulary and JSON-LD context for GeoJSON
 
-The GeoJSON-LD project defines a base context for processing GeoJSON according
+GeoJSON-LD 1.0 defines a base context for processing GeoJSON according
 to the [JSON-LD](https://www.w3.org/TR/json-ld/) processing model. When
 a JSON-LD processor encounters a GeoJSON document with the
 `application/geo+json` media type that does not contain a `@context` member, it
@@ -17,6 +17,71 @@ context defined here but MUST NOT override or change the meaning of its terms.
 The vocabulary is published at [http://geojson.org/vocab#](http://geojson.org/vocab#) and the context is
 published at [http://geojson.org/geojson-context.jsonld](http://geojson.org/geojson-context.jsonld).
 
+## Example
+
+Pasting the following GeoJSON-LD document
+
+```json
+{
+  "@context": {
+    "geojson": "http://geojson.org/vocab#",
+    "Feature": "geojson:Feature",
+    "FeatureCollection": "geojson:FeatureCollection",
+    "GeometryCollection": "geojson:GeometryCollection",
+    "LineString": "geojson:LineString",
+    "MultiLineString": "geojson:MultiLineString",
+    "MultiPoint": "geojson:MultiPoint",
+    "MultiPolygon": "geojson:MultiPolygon",
+    "Point": "geojson:Point",
+    "Polygon": "geojson:Polygon",
+    "bbox": {
+      "@container": "@list",
+      "@id": "geojson:bbox"
+    },
+    "coordinates": "geojson:coordinates",
+    "description": "http://purl.org/dc/terms/description",
+    "features": {
+      "@container": "@set",
+      "@id": "geojson:features"
+    },
+    "geometry": "geojson:geometry",
+    "id": "@id",
+    "properties": "geojson:properties",
+    "type": "@type",
+    "description": "http://purl.org/dc/terms/description",
+    "title": "http://purl.org/dc/terms/title"
+  },
+  "type": "Feature",
+  "id": "http://example.com/features/1",
+  "geometry": {"type": "Point", "coordinates": [0.0, 0.0]},
+  "properties": {
+    "title": "Null Island",
+    "description": "A fictional island in the Gulf of Guinea"
+  }
+}
+```
+
+into the [JSON-LD Playground](http://json-ld.org/playground/) form yields
+the following compacted JSON-LD.
+
+```json
+{
+  "@id": "http://example.com/features/1",
+  "@type": "http://geojson.org/vocab#Feature",
+  "http://geojson.org/vocab#geometry": {
+    "@type": "http://geojson.org/vocab#Point",
+    "http://geojson.org/vocab#coordinates": [
+      0,
+      0
+    ]
+  },
+  "http://geojson.org/vocab#properties": {
+    "http://purl.org/dc/terms/description": "A fictional island in the Gulf of Guinea",
+    "http://purl.org/dc/terms/title": "Null Island"
+  }
+}
+```
+
 ## See Also
 
 Activity Streams 2.0: https://www.w3.org/TR/activitystreams-core/, from which