kepler.gl/src/deckgl-layers/dist/layer-utils/cluster-utils.js

kepler.gl is a webgl based application to visualize large scale location data in the browser

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
Object.defineProperty(exports, "__esModule", {
  value: true
});
exports["default"] = void 0;
exports.getGeoJSON = getGeoJSON;
var _classCallCheck2 = _interopRequireDefault(require("@babel/runtime/helpers/classCallCheck"));
var _createClass2 = _interopRequireDefault(require("@babel/runtime/helpers/createClass"));
var _defineProperty2 = _interopRequireDefault(require("@babel/runtime/helpers/defineProperty"));
var _toConsumableArray2 = _interopRequireDefault(require("@babel/runtime/helpers/toConsumableArray"));
var _supercluster = _interopRequireDefault(require("supercluster"));
var _lodash = _interopRequireDefault(require("lodash.memoize"));
// SPDX-License-Identifier: MIT
// Copyright contributors to the kepler.gl project

function getGeoJSON(data, getPosition, filterData) {
  var raw = typeof filterData === 'function' ? data.filter(filterData) : data;
  return raw.map(function (d) {
    return {
      type: 'Point',
      properties: {
        data: d,
        points: [d],
        point_count: 1,
        point_count_abbreviated: '1'
      },
      geometry: {
        coordinates: getPosition(d)
      }
    };
  }).filter(function (d) {
    return d.geometry.coordinates.every(Number.isFinite);
  });
}
var clusterResolver = function clusterResolver(_ref) {
  var clusterRadius = _ref.clusterRadius;
  return "".concat(clusterRadius);
};
var getClusterer = function getClusterer(_ref2) {
  var clusterRadius = _ref2.clusterRadius,
    geoJSON = _ref2.geoJSON;
  return new _supercluster["default"]({
    maxZoom: 20,
    radius: clusterRadius,
    reduce: function reduce(accumulated, props) {
      accumulated.points = [].concat((0, _toConsumableArray2["default"])(accumulated.points), (0, _toConsumableArray2["default"])(props.points));
    },
    map: function map(props) {
      return {
        points: [props.data]
      };
    }
  }).load(geoJSON);
};
var ClusterBuilder = exports["default"] = /*#__PURE__*/function () {
  function ClusterBuilder() {
    (0, _classCallCheck2["default"])(this, ClusterBuilder);
    (0, _defineProperty2["default"])(this, "clusterer", void 0);
    this.clusterer = (0, _lodash["default"])(getClusterer, clusterResolver);
  }
  return (0, _createClass2["default"])(ClusterBuilder, [{
    key: "clustersAtZoom",
    value: function clustersAtZoom(_ref3) {
      var bbox = _ref3.bbox,
        clusterRadius = _ref3.clusterRadius,
        geoJSON = _ref3.geoJSON,
        zoom = _ref3.zoom;
      var clusterer = this.clusterer({
        clusterRadius: clusterRadius,
        geoJSON: geoJSON
      });

      // map clusters to formatted bins to be passed to deck.gl bin-sorter
      var clusters = clusterer.getClusters(bbox, zoom).map(function (c, i) {
        return {
          points: c.properties.points,
          position: c.geometry.coordinates,
          index: i
        };
      });
      return clusters;
    }
  }, {
    key: "clearClustererCache",
    value: function clearClustererCache() {
      var _this$clusterer$cache, _this$clusterer$cache2;
      (_this$clusterer$cache = (_this$clusterer$cache2 = this.clusterer.cache).clear) === null || _this$clusterer$cache === void 0 || _this$clusterer$cache.call(_this$clusterer$cache2);
    }
  }]);
}();
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