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kepler.gl

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

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'use strict'; Object.defineProperty(exports, "__esModule", { value: true }); var _extends2 = require('babel-runtime/helpers/extends'); var _extends3 = _interopRequireDefault(_extends2); var _typeof2 = require('babel-runtime/helpers/typeof'); var _typeof3 = _interopRequireDefault(_typeof2); exports.getGeojsonDataMaps = getGeojsonDataMaps; exports.parseGeometryFromString = parseGeometryFromString; exports.getGeojsonBounds = getGeojsonBounds; exports.featureToDeckGlGeoType = featureToDeckGlGeoType; var _geojsonExtent = require('@mapbox/geojson-extent'); var _geojsonExtent2 = _interopRequireDefault(_geojsonExtent); var _wellknown = require('wellknown'); var _wellknown2 = _interopRequireDefault(_wellknown); var _geojsonNormalize = require('@mapbox/geojson-normalize'); var _geojsonNormalize2 = _interopRequireDefault(_geojsonNormalize); var _dataUtils = require('../../utils/data-utils'); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; } /** * Parse raw data to geojson feature * @param allData * @param getFeature * @returns {{}} */ // Copyright (c) 2018 Uber Technologies, Inc. // // Permission is hereby granted, free of charge, to any person obtaining a copy // of this software and associated documentation files (the "Software"), to deal // in the Software without restriction, including without limitation the rights // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell // copies of the Software, and to permit persons to whom the Software is // furnished to do so, subject to the following conditions: // // The above copyright notice and this permission notice shall be included in // all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN // THE SOFTWARE. function getGeojsonDataMaps(allData, getFeature) { var acceptableTypes = ['Point', 'MultiPoint', 'LineString', 'MultiLineString', 'Polygon', 'MultiPolygon', 'GeometryCollection']; var dataToFeature = {}; allData.forEach(function (d, index) { dataToFeature[index] = null; var rawFeature = getFeature(d); var feature = null; // parse feature from field if (Array.isArray(rawFeature)) { // Support geojson as an array of points feature = { type: 'Feature', geometry: { // why do we need to flip it... coordinates: rawFeature.map(function (pts) { return [pts[1], pts[0]]; }), type: 'LineString' } }; } else if (typeof rawFeature === 'string') { feature = parseGeometryFromString(rawFeature); } else if ((typeof rawFeature === 'undefined' ? 'undefined' : (0, _typeof3.default)(rawFeature)) === 'object') { // Support geojson feature as object // probably need to normalize it as well var normalized = (0, _geojsonNormalize2.default)(rawFeature); if (!normalized || !Array.isArray(normalized.features)) { // fail to normalize geojson return null; } feature = normalized.features[0]; } if (feature && feature.geometry && acceptableTypes.includes(feature.geometry.type)) { // store index of the data in feature properties feature.properties = (0, _extends3.default)({}, feature.properties || {}, { index: index }); dataToFeature[index] = feature; } }); return dataToFeature; } /** * Parse geojson from string * @param {String} geoString * @returns {null | Object} geojson object or null if failed */ function parseGeometryFromString(geoString) { var parsedGeo = void 0; // try parse as geojson string // {"type":"Polygon","coordinates":[[[-74.158491,40.83594]]]} try { parsedGeo = JSON.parse(geoString); } catch (e) {} // keep trying to parse // try parse as wkt if (!parsedGeo) { try { parsedGeo = (0, _wellknown2.default)(geoString); } catch (e) { return null; } } if (!parsedGeo) { return null; } var normalized = (0, _geojsonNormalize2.default)(parsedGeo); if (!normalized || !Array.isArray(normalized.features)) { // fail to normalize geojson return null; } return normalized.features[0]; } function getGeojsonBounds() { var features = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : []; // calculate feature bounds is computation heavy // here we only pick couple var samples = features.length > 500 ? 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IN NO EVENT SHALL THE\n// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\n// THE SOFTWARE.\n\nimport geojsonExtent from '@mapbox/geojson-extent';\nimport wktParser from 'wellknown';\nimport normalize from '@mapbox/geojson-normalize';\n\nimport {getSampleData} from 'utils/data-utils';\n\n/**\n * Parse raw data to geojson feature\n * @param allData\n * @param getFeature\n * @returns {{}}\n */\nexport function getGeojsonDataMaps(allData, getFeature) {\n  const acceptableTypes = [\n    'Point',\n    'MultiPoint',\n    'LineString',\n    'MultiLineString',\n    'Polygon',\n    'MultiPolygon',\n    'GeometryCollection'\n  ];\n\n  const dataToFeature = {};\n\n  allData.forEach((d, index) => {\n    dataToFeature[index] = null;\n    const rawFeature = getFeature(d);\n\n    let feature = null;\n\n    // parse feature from field\n    if (Array.isArray(rawFeature)) {\n      // Support geojson as an array of points\n      feature = {\n        type: 'Feature',\n        geometry: {\n          // why do we need to flip it...\n          coordinates: rawFeature.map(pts => [pts[1], pts[0]]),\n          type: 'LineString'\n        }\n      };\n    } else if (typeof rawFeature === 'string') {\n      feature = parseGeometryFromString(rawFeature);\n    } else if (typeof rawFeature === 'object') {\n      // Support geojson feature as object\n      // probably need to normalize it as well\n      const normalized = normalize(rawFeature);\n      if (!normalized || !Array.isArray(normalized.features)) {\n        // fail to normalize geojson\n        return null;\n      }\n\n      feature = normalized.features[0];\n    }\n\n    if (\n      feature &&\n      feature.geometry &&\n      acceptableTypes.includes(feature.geometry.type)\n    ) {\n      // store index of the data in feature properties\n      feature.properties = {\n        ...(feature.properties || {}),\n        index\n      };\n\n      dataToFeature[index] = feature;\n    }\n  });\n\n  return dataToFeature;\n}\n\n/**\n * Parse geojson from string\n * @param {String} geoString\n * @returns {null | Object} geojson object or null if failed\n */\nexport function parseGeometryFromString(geoString) {\n  let parsedGeo;\n\n  // try parse as geojson string\n  // {\"type\":\"Polygon\",\"coordinates\":[[[-74.158491,40.83594]]]}\n  try {\n    parsedGeo = JSON.parse(geoString);\n  } catch (e) {\n    // keep trying to parse\n  }\n\n  // try parse as wkt\n  if (!parsedGeo) {\n    try {\n      parsedGeo = wktParser(geoString);\n    } catch (e) {\n      return null;\n    }\n  }\n\n  if (!parsedGeo) {\n    return null;\n  }\n\n  const normalized = normalize(parsedGeo);\n\n  if (!normalized || !Array.isArray(normalized.features)) {\n    // fail to normalize geojson\n    return null;\n  }\n\n  return normalized.features[0];\n}\n\nexport function getGeojsonBounds(features = []) {\n  // calculate feature bounds is computation heavy\n  // here we only pick couple\n  const samples =\n    features.length > 500 ? getSampleData(features, 500) : features;\n\n  const nonEmpty = samples.filter(\n    d =>\n      d && d.geometry && d.geometry.coordinates && d.geometry.coordinates.length\n  );\n\n  try {\n    return geojsonExtent({\n      type: 'FeatureCollection',\n      features: nonEmpty\n    });\n  } catch (e) {\n    return null;\n  }\n}\n\nexport function featureToDeckGlGeoType(type) {\n  switch (type) {\n    case 'Point':\n    case 'MultiPoint':\n      return 'point';\n\n    case 'LineString':\n    case 'MultiLineString':\n      return 'line';\n\n    case 'Polygon':\n    case 'MultiPolygon':\n      return 'polygon';\n\n    default:\n      return null;\n  }\n}\n"]}