geojson-extract-geometries

Extract geometries from geojson for given basic geometry type.

installation

npm install geojson-extract-geometries

usage

var extract = require('geojson-extract-geometries')
var geometries = extract(geojson, type)

type is basic GeoJSON geometry type Point | LineString | Polygon default is Point

example

  var features = {
    "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": {
          "prop0": "value0",
          "prop1": 0.0
          }
        },
      { "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": {
           "prop0": "value0",
           "prop1": {"this": "that"}
           }
         }
    ]}
var extract = require('geojson-extract-geometries')
var geometries = extract(features, 'LineString')
// geometries variable value is
//  [
//    { 
//      "type": "LineString",
//      "coordinates": [
//        [102.0, 0.0], [103.0, 1.0], [104.0, 0.0], [105.0, 1.0]
//      ]
//    }
//  ]
 
 

developing

Once you run

npm isntall

then for running test

npm run test

to create build

npm run build

license

This project is licensed under the terms of the MIT license.