Install

$ npm install --save geojson-geometries

Usage

const GeoJsonGeometries = require('geojson-geometries');

const geojson = {type: 'FeatureCollection',
  features: [{
    type: 'Feature',
    geometry: {
      type: 'Point',
      coordinates: [102.0, 0.5]
    },
    properties: {prop0: 'value0'}
  }, {
    type: 'Feature',
    geometry: {
      type: 'LineString',
      coordinates: [[102.0, 0.0], [103.0, 1.0], [104.0, 0.0], [105.0, 1.0]]
    },
    properties: {prop1: 'value1'}
  }, {
    type: 'Feature',
    geometry: {
      type: 'Polygon',
      coordinates: [
        [[100.0, 0.0], [101.0, 0.0], [101.0, 1.0], [100.0, 1.0], [100.0, 0.0]]
      ]
    },
    properties: {prop2: 'value2'}
  }]
};

const extracted = new GeoJsonGeometries(geojson);

extracted.points
// => {
//   type: "FeatureCollection",
//   features: [{
//     type: "Feature",
//     geometry: {
//       type: "Point",
//       coordinates: [102, 0.5]
//     },
//     properties: {prop0: 'value0'}
//   }]
// }

extracted.lines
// => {
//   type: "FeatureCollection",
//   features: [{
//     type: "Feature",
//     geometry: {
//       type: "LineString",
//       coordinates: [[[102.0, 0.0], [103.0, 1.0], [104.0, 0.0], [105.0, 1.0]]]
//     },
//     properties: {prop1: 'value1'}
//   }]
// }

extracted.polygons
// => {
//   type: "FeatureCollection",
//   features: [{
//     type: "Feature",
//     geometry: {
//       type: "Polygon",
//       coordinates: [[[100.0, 0.0], [101.0, 0.0], [101.0, 1.0], [100.0, 1.0], [100.0, 0.0]]]
//     },
//     properties: {prop2: 'value2'}
//   }]
// }

API

new GeoJsonGeometries(geoJson, [options])

Create an instance of the geometries extractor.

| Param | Type | Description | | --- | --- | --- | | geoJson | Object | The GeoJSON from which extract the geometries. | | [options] | Object | Optional options. | | options.ignorePoints | boolean | If true the extractor will ignore geometries of type Point. | | options.ignoreLines | boolean | If true the extractor will ignore geometries of type LineString. | | options.ignorePolygon | boolean | If true the extractor will ignore geometries of type Polygon. |

geoJsonGeometries.points ⇒ Array.<Object>

Returns the list of geometries of type Point found in the GeoJSON.

Kind: instance property of GeoJsonGeometries
Returns: Array.<Object> - A FeatureCollection of points with inherited properties if any.

geoJsonGeometries.lines ⇒ Array.<Object>

Returns the list of geometries of type LineString found in the GeoJSON.

Kind: instance property of GeoJsonGeometries
Returns: Array.<Object> - A FeatureCollection of lines with inherited properties if any.

geoJsonGeometries.polygons ⇒ Array.<Object>

Returns the list of geometries of type Polygon found in the GeoJSON.

Kind: instance property of GeoJsonGeometries
Returns: Array.<Object> - A FeatureCollection of polygons with inherited properties if any.

Authors

• Simone Primarosa - Github (@simonepri) • Twitter (@simoneprimarosa)

See also the list of contributors who participated in this project.

License

This project is licensed under the MIT License - see the license file for details.