kml转geojson

const readline = require('readline');
const fs = require('fs');
const Path = require('path');
const DIR = 'C:/Users/Admin/Desktop/';
const dir = fs.readdirSync(DIR);
dir.forEach(k => {
  if (k.indexOf('.kml') !== -1) {
    const path = DIR + k;
    const inp = readline.createInterface({
      input: fs.createReadStream(path),
    });

    let results = '';
    inp.on('line', line => {
      if (!line.length || line.startsWith(';')) return;
      if (line.indexOf('<Placemark') !== -1) {
        results += '{';
      }
      results += line;
      if (line.indexOf('</Placemark') !== -1) {
        results += '}';
      }
    });

    inp.on('close', () => {
      const bb = results.split('}');
      const geojson = {
        type: 'FeatureCollection',
        features: []
      };
      const geojson2 = {
        type: 'FeatureCollection',
        features: []
      };
      for (let i = 0; i < bb.length - 2; i++) {
        if (bb[i].split('<Placemark id=')[1]) {
          const coor = bb[i].split('<coordinates>')[1].split('</coordinates>')[0].split(',');
          const coor1 = bb[i + 1].split('<coordinates>')[1].split('</coordinates>')[0].split(',');
          geojson.features.push(
            {
              type: 'Feature',
              geometry: {
                type: 'LineString',
                coordinates: [[Number(coor[0]), Number(coor[1])], [Number(coor1[0]), Number(coor1[1])]]
              },
              properties: { measure: bb[i].split('<Placemark id="')[1].split('">')[0] },
            });
        }
      }
      for (let i = 0; i < bb.length; i++) {
        if (bb[i].split('<Placemark id=')[1]) {
          const coor = bb[i].split('<coordinates>')[1].split('</coordinates>')[0].split(',');
          geojson2.features.push(
            {
              type: 'Feature',
              geometry: {
                type: 'Point',
                coordinates: [Number(coor[0]), Number(coor[1])]
              },
              properties: { measure: bb[i].split('<Placemark id="')[1].split('">')[0] },
            });
        }
      }
      fs.writeFileSync(DIR + k.split('.kml')[0] + '.geojson', JSON.stringify(geojson, null, 2));
      fs.writeFileSync(DIR + k.split('.kml')[0] + '点.geojson', JSON.stringify(geojson2, null, 2));
    });
  }
});

// node generator.js