kepler.gl
Version:
kepler.gl is a webgl based application to visualize large scale location data in the browser
178 lines (142 loc) • 17.6 kB
JavaScript
;
var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.parseGeoJsonRawFeature = parseGeoJsonRawFeature;
exports.getGeojsonDataMaps = getGeojsonDataMaps;
exports.parseGeometryFromString = parseGeometryFromString;
exports.getGeojsonBounds = getGeojsonBounds;
exports.getGeojsonFeatureTypes = getGeojsonFeatureTypes;
exports.featureToDeckGlGeoType = void 0;
var _defineProperty2 = _interopRequireDefault(require("@babel/runtime/helpers/defineProperty"));
var _typeof2 = _interopRequireDefault(require("@babel/runtime/helpers/typeof"));
var _wellknown = _interopRequireDefault(require("wellknown"));
var _geojsonNormalize = _interopRequireDefault(require("@mapbox/geojson-normalize"));
var _bbox = _interopRequireDefault(require("@turf/bbox"));
var _dataUtils = require("../../utils/data-utils");
function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); if (enumerableOnly) symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; }); keys.push.apply(keys, symbols); } return keys; }
function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; if (i % 2) { ownKeys(Object(source), true).forEach(function (key) { (0, _defineProperty2["default"])(target, key, source[key]); }); } else if (Object.getOwnPropertyDescriptors) { Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)); } else { ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } } return target; }
function parseGeoJsonRawFeature(rawFeature) {
if ((0, _typeof2["default"])(rawFeature) === 'object') {
// Support GeoJson feature as object
// probably need to normalize it as well
var normalized = (0, _geojsonNormalize["default"])(rawFeature);
if (!normalized || !Array.isArray(normalized.features)) {
// fail to normalize GeoJson
return null;
}
return normalized.features[0];
} else if (typeof rawFeature === 'string') {
return parseGeometryFromString(rawFeature);
} else if (Array.isArray(rawFeature)) {
// Support GeoJson LineString as an array of points
return {
type: 'Feature',
geometry: {
// why do we need to flip it...
coordinates: rawFeature.map(function (pts) {
return [pts[1], pts[0]];
}),
type: 'LineString'
}
};
}
return null;
}
/**
* Parse raw data to GeoJson feature
* @param allData
* @param getFeature
* @returns {{}}
*/
function getGeojsonDataMaps(allData, getFeature) {
var acceptableTypes = ['Point', 'MultiPoint', 'LineString', 'MultiLineString', 'Polygon', 'MultiPolygon', 'GeometryCollection'];
var dataToFeature = [];
for (var index = 0; index < allData.length; index++) {
var feature = parseGeoJsonRawFeature(getFeature(allData[index]));
if (feature && feature.geometry && acceptableTypes.includes(feature.geometry.type)) {
// store index of the data in feature properties
feature.properties = _objectSpread({}, feature.properties || {}, {
index: index
});
dataToFeature[index] = feature;
} else {
dataToFeature[index] = null;
}
}
return dataToFeature;
}
/**
* Parse geojson from string
* @param {String} geoString
* @returns {null | Object} geojson object or null if failed
*/
function parseGeometryFromString(geoString) {
var parsedGeo; // 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, _wellknown["default"])(geoString);
} catch (e) {
return null;
}
}
if (!parsedGeo) {
return null;
}
var normalized = (0, _geojsonNormalize["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] : [];
// 70 ms for 10,000 polygons
// here we only pick couple
var maxCount = 10000;
var samples = features.length > maxCount ? (0, _dataUtils.getSampleData)(features, maxCount) : features;
var nonEmpty = samples.filter(function (d) {
return d && d.geometry && d.geometry.coordinates && d.geometry.coordinates.length;
});
try {
return (0, _bbox["default"])({
type: 'FeatureCollection',
features: nonEmpty
});
} catch (e) {
return null;
}
}
var featureToDeckGlGeoType = {
Point: 'point',
MultiPoint: 'point',
LineString: 'line',
MultiLineString: 'line',
Polygon: 'polygon',
MultiPolygon: 'polygon'
};
/**
* Parse geojson from string
* @param {Array<Object>} allFeatures
* @returns {Object} mapping of feature type existence
*/
exports.featureToDeckGlGeoType = featureToDeckGlGeoType;
function getGeojsonFeatureTypes(allFeatures) {
var featureTypes = {};
for (var f = 0; f < allFeatures.length; f++) {
var feature = allFeatures[f];
var geoType = featureToDeckGlGeoType[feature && feature.geometry && feature.geometry.type];
if (geoType) {
featureTypes[geoType] = true;
}
}
return featureTypes;
}
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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 wktParser from 'wellknown';\nimport normalize from '@mapbox/geojson-normalize';\nimport bbox from '@turf/bbox';\n\nimport {getSampleData} from 'utils/data-utils';\n\nexport function parseGeoJsonRawFeature(rawFeature) {\n  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    return normalized.features[0];\n  } else if (typeof rawFeature === 'string') {\n    return parseGeometryFromString(rawFeature);\n  } else if (Array.isArray(rawFeature)) {\n    // Support GeoJson  LineString as an array of points\n    return {\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  }\n\n  return null;\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  for (let index = 0; index < allData.length; index++) {\n    const feature = parseGeoJsonRawFeature(getFeature(allData[index]));\n\n    if (feature && feature.geometry && acceptableTypes.includes(feature.geometry.type)) {\n      // store index of the data in feature properties\n      feature.properties = {\n        ...(feature.properties || {}),\n        index\n      };\n\n      dataToFeature[index] = feature;\n    } else {\n      dataToFeature[index] = null;\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  // 70 ms for 10,000 polygons\n  // here we only pick couple\n  const maxCount = 10000;\n  const samples = features.length > maxCount ? getSampleData(features, maxCount) : features;\n\n  const nonEmpty = samples.filter(\n    d => d && d.geometry && d.geometry.coordinates && d.geometry.coordinates.length\n  );\n\n  try {\n    return bbox({\n      type: 'FeatureCollection',\n      features: nonEmpty\n    });\n  } catch (e) {\n    return null;\n  }\n}\n\nexport const featureToDeckGlGeoType = {\n  Point: 'point',\n  MultiPoint: 'point',\n  LineString: 'line',\n  MultiLineString: 'line',\n  Polygon: 'polygon',\n  MultiPolygon: 'polygon'\n};\n\n/**\n * Parse geojson from string\n * @param {Array<Object>} allFeatures\n * @returns {Object} mapping of feature type existence\n */\nexport function getGeojsonFeatureTypes(allFeatures) {\n  const featureTypes = {};\n  for (let f = 0; f < allFeatures.length; f++) {\n    const feature = allFeatures[f];\n    const geoType = featureToDeckGlGeoType[feature && feature.geometry && feature.geometry.type];\n    if (geoType) {\n      featureTypes[geoType] = true;\n    }\n  }\n\n  return featureTypes;\n}\n"]}