 <p>There is an error in the placement of the 'projection' attribute. The answer below shows the correct one.</p> <pre><code>source: { type: "GeoJSON", geojson: { object: { type: "FeatureCollection", features: [{ type: "Feature", id: "TWN", properties: { name: "Taiwan" }, geometry: { type: "Point", coordinates: [25.038507, 121.525527] } }] }, projection: 'EPSG:4326', } </code></pre> <p>}</p>