kepler.gl/dist/src/data-utils.js

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

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.findMapBounds = findMapBounds;
exports.processLayerBounds = processLayerBounds;
var _src = require("/Users/ihordykhta/Desktop/unfolded/kepler.gl/src/utils/src");
// SPDX-License-Identifier: MIT
// Copyright contributors to the kepler.gl project

/**
 * takes a list of layer bounds and returns a single bound
 */
function processLayerBounds(layerBounds) {
  return layerBounds.reduce(function (res, b) {
    var minLongitude = Math.min(res[0], b[0]);
    var minLatitude = Math.min(res[1], b[1]);
    var maxLongitude = Math.max(res[2], b[2]);
    var maxLatitude = Math.max(res[3], b[3]);

    // for some reason WebMercatorViewport can't handle latitude -90,90 and throws an error
    // so we default to lat/lng (0,0)
    // viewport.js:81 Uncaught Error: Pixel project matrix not invertible
    // at WebMercatorViewport16.Viewport5 (viewport.js:81:13)
    // at new WebMercatorViewport16 (web-mercator-viewport.js:92:5)
    // at getViewportFromMapState (map-utils.js:46:66)
    return [(0, _src.validateLongitude)(minLongitude), (0, _src.validateLatitude)(minLatitude), (0, _src.validateLongitude)(maxLongitude), (0, _src.validateLatitude)(maxLatitude)];
  }, [_src.MAX_LONGITUDE, _src.MAX_LATITUDE, _src.MIN_LONGITUDE, _src.MIN_LATITUDE]);
}

/**
 * return center of map from given points
 * @param layers
 * @returns coordinates of map center, empty if not found
 */
function findMapBounds(layers) {
  // find bounds in formatted layerData
  // take ALL layers into account when finding map bounds
  var availableLayerBounds = layers.reduce(function (res, l) {
    if (l.meta && l.meta.bounds) {
      res.push(l.meta.bounds);
    }
    return res;
  }, []);
  // return null if no layer is available
  if (availableLayerBounds.length === 0) {
    return null;
  }
  // merge bounds in each layer
  return processLayerBounds(availableLayerBounds);
}
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YjtFQUNBO0VBQ0EsT0FBT3pCLGtCQUFrQixDQUFDb0Isb0JBQW9CLENBQUM7QUFDakQiLCJpZ25vcmVMaXN0IjpbXX0=