const featureTypeExternalId = 'ocean_temperature';
const features = [
  { externalId: 'measurement_point_765', temperature: 5.65, location: { wkt: 'POINT(60.547602 -5.423433)' }},
  { externalId: 'measurement_point_863', temperature: 5.03, location: { wkt: 'POINT(60.585858 -6.474416)' }},
];
const createdFeatures = await client.geospatial.feature.create(featureTypeExternalId, features);

{
  "items": [
    {
      "externalId": "measurement_point_765",
      "temperature": 5.65,
      "location": {
        "wkt": "POINT(60.547602 -5.423433)"
      },
      "createdTime": 1629784673505,
      "lastUpdatedTime": 1629784673505
    },
    {
      "externalId": "measurement_point_863",
      "temperature": 5.03,
      "location": {
        "wkt": "POINT(60.585858 -6.474416)"
      },
      "createdTime": 1629784673505,
      "lastUpdatedTime": 1629784673505
    }
  ]
}