itowns
Version:
A JS/WebGL framework for 3D geospatial data visualization
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JavaScript
;
var _interopRequireWildcard = require("@babel/runtime/helpers/interopRequireWildcard");
var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
Object.defineProperty(exports, "__esModule", {
value: true
});
exports["default"] = void 0;
var _Coordinates = _interopRequireDefault(require("../Core/Geographic/Coordinates"));
var _Feature = _interopRequireWildcard(require("../Core/Feature"));
var _Style = _interopRequireDefault(require("../Core/Style"));
function readCRS(json) {
if (json.crs) {
if (json.crs.type.toLowerCase() == 'epsg') {
return "EPSG:".concat(json.crs.properties.code);
} else if (json.crs.type.toLowerCase() == 'name') {
var epsgIdx = json.crs.properties.name.toLowerCase().indexOf('epsg:');
if (epsgIdx >= 0) {
// authority:version:code => EPSG:[...]:code
var codeStart = json.crs.properties.name.indexOf(':', epsgIdx + 5);
if (codeStart > 0) {
return "EPSG:".concat(json.crs.properties.name.substr(codeStart + 1));
}
}
}
throw new Error("Unsupported CRS type '".concat(json.crs, "'"));
} // assume default crs
return 'EPSG:4326';
}
var coord = new _Coordinates["default"]('EPSG:4978', 0, 0, 0); // filter with the first point
var firstPtIsOut = function (extent, aCoords, crs) {
coord.crs = crs;
coord.setFromArray(aCoords[0]);
return !extent.isPointInside(coord);
};
var toFeature = {
populateGeometry: function populateGeometry(crsIn, coordinates, geometry) {
var setAltitude = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : true;
geometry.startSubGeometry(coordinates.length);
var useAlti = setAltitude && typeof coordinates[0][2] == 'number'; // coordinates is a list of pair [[x1, y1], [x2, y2], ..., [xn, yn]]
var _iteratorNormalCompletion = true;
var _didIteratorError = false;
var _iteratorError = undefined;
try {
for (var _iterator = coordinates[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {
var pair = _step.value;
coord.crs = crsIn;
coord.setFromValues(pair[0], pair[1], useAlti ? pair[2] : 0);
geometry.pushCoordinates(coord);
}
} catch (err) {
_didIteratorError = true;
_iteratorError = err;
} finally {
try {
if (!_iteratorNormalCompletion && _iterator["return"] != null) {
_iterator["return"]();
}
} finally {
if (_didIteratorError) {
throw _iteratorError;
}
}
}
geometry.updateExtent();
},
"default": function _default(feature, crsIn, coordsIn, filteringExtent, setAltitude, properties) {
if (filteringExtent && firstPtIsOut(filteringExtent, coordsIn, crsIn)) {
return;
}
var geometry = feature.bindNewGeometry();
geometry.properties = properties;
geometry.properties.style = new _Style["default"]().setFromGeojsonProperties(properties, feature.type);
this.populateGeometry(crsIn, coordsIn, geometry, setAltitude);
feature.updateExtent(geometry);
},
polygon: function polygon(feature, crsIn, coordsIn, filteringExtent, setAltitude, properties) {
// filtering
if (filteringExtent && firstPtIsOut(filteringExtent, coordsIn[0], crsIn)) {
return;
}
var geometry = feature.bindNewGeometry();
geometry.properties = properties;
geometry.properties.style = new _Style["default"]().setFromGeojsonProperties(properties, feature.type); // Then read contour and holes
for (var i = 0; i < coordsIn.length; i++) {
this.populateGeometry(crsIn, coordsIn[i], geometry, setAltitude);
}
feature.updateExtent(geometry);
},
multi: function multi(type, feature, crsIn, coordsIn, filteringExtent, setAltitude, properties) {
var _iteratorNormalCompletion2 = true;
var _didIteratorError2 = false;
var _iteratorError2 = undefined;
try {
for (var _iterator2 = coordsIn[Symbol.iterator](), _step2; !(_iteratorNormalCompletion2 = (_step2 = _iterator2.next()).done); _iteratorNormalCompletion2 = true) {
var coords = _step2.value;
this[type](feature, crsIn, coords, filteringExtent, setAltitude, properties);
}
} catch (err) {
_didIteratorError2 = true;
_iteratorError2 = err;
} finally {
try {
if (!_iteratorNormalCompletion2 && _iterator2["return"] != null) {
_iterator2["return"]();
}
} finally {
if (_didIteratorError2) {
throw _iteratorError2;
}
}
}
}
};
function coordinatesToFeature(type, feature, crsIn, coordinates, filteringExtent, setAltitude, properties) {
if (coordinates.length == 0) {
return;
}
switch (type) {
case 'point':
case 'linestring':
return toFeature["default"](feature, crsIn, coordinates, filteringExtent, setAltitude, properties);
case 'multipoint':
case 'multilinestring':
return toFeature.multi('default', feature, crsIn, coordinates, filteringExtent, setAltitude, properties);
case 'polygon':
return toFeature.polygon(feature, crsIn, coordinates, filteringExtent, setAltitude, properties);
case 'multipolygon':
return toFeature.multi('polygon', feature, crsIn, coordinates, filteringExtent, setAltitude, properties);
case 'geometrycollection':
default:
throw new Error("Unhandled geojson type ".concat(feature.type));
}
}
function toFeatureType(jsonType) {
switch (jsonType) {
case 'point':
case 'multipoint':
return _Feature.FEATURE_TYPES.POINT;
case 'linestring':
case 'multilinestring':
return _Feature.FEATURE_TYPES.LINE;
case 'polygon':
case 'multipolygon':
return _Feature.FEATURE_TYPES.POLYGON;
case 'geometrycollection':
default:
throw new Error("Unhandled geometry type ".concat(jsonType));
}
}
var keyProperties = ['type', 'geometry', 'properties'];
function jsonFeatureToFeature(crsIn, crsOut, json, filteringExtent, options, featureCollection) {
if (options.filter && !options.filter(json.properties, json.geometry)) {
return;
}
var jsonType = json.geometry.type.toLowerCase();
var featureType = toFeatureType(jsonType);
var feature = options.mergeFeatures ? featureCollection.requestFeatureByType(featureType) : new _Feature["default"](featureType, crsOut, options);
var geometryCount = feature.geometryCount;
var coordinates = jsonType != 'point' ? json.geometry.coordinates : [json.geometry.coordinates];
var setAltitude = !options.overrideAltitudeInToZero && options.withAltitude;
var properties = json.properties || {}; // copy other properties
for (var _i = 0, _Object$keys = Object.keys(json); _i < _Object$keys.length; _i++) {
var key = _Object$keys[_i];
if (!keyProperties.includes(key.toLowerCase())) {
properties[key] = json[key];
}
}
coordinatesToFeature(jsonType, feature, crsIn, coordinates, filteringExtent, setAltitude, properties);
if (feature.geometryCount == geometryCount) {
return;
}
return feature;
}
function jsonFeaturesToFeatures(crsIn, crsOut, jsonFeatures, filteringExtent, options) {
var features = new _Feature.FeatureCollection(crsOut, options);
var _iteratorNormalCompletion3 = true;
var _didIteratorError3 = false;
var _iteratorError3 = undefined;
try {
for (var _iterator3 = jsonFeatures[Symbol.iterator](), _step3; !(_iteratorNormalCompletion3 = (_step3 = _iterator3.next()).done); _iteratorNormalCompletion3 = true) {
var jsonFeature = _step3.value;
var feature = jsonFeatureToFeature(crsIn, crsOut, jsonFeature, filteringExtent, options, features);
if (feature && !options.mergeFeatures) {
features.pushFeature(feature);
}
}
} catch (err) {
_didIteratorError3 = true;
_iteratorError3 = err;
} finally {
try {
if (!_iteratorNormalCompletion3 && _iterator3["return"] != null) {
_iterator3["return"]();
}
} finally {
if (_didIteratorError3) {
throw _iteratorError3;
}
}
}
if (options.mergeFeatures) {
features.removeEmptyFeature();
features.updateExtent();
}
return features;
}
/**
* The GeoJsonParser module provide a [parse]{@link module:GeoJsonParser.parse}
* method that takes a GeoJSON in and gives an object formatted for iTowns
* containing all necessary informations to display this GeoJSON.
*
* @module GeoJsonParser
*/
var _default = {
/**
* @typedef {Object} GeoJsonParserOptions
* @property {string} crsOut - The CRS to convert the input coordinates
* to.
* @property {string} crsIn - Override the data CRS.
* @property {Extent} [filteringExtent] - Optional filter to reject
* features outside of this extent.
* @property {boolean} [buildExtent=false] - If true the geometry will
* have an extent property containing the area covered by the geom
* @property {function} [filter] - Filter function to remove features
* @property {boolean} [mergeFeatures=true] - If true all geometries are merged by type and multi-type
* @property {boolean} [withNormal=true] - If true each coordinate normal is computed
* @property {boolean} [withAltitude=true] - If true each coordinate altitude is kept
* @property {boolean} [overrideAltitudeInToZero=false] - If true, the altitude of the source data isn't taken into account for 3D geometry convertions.
* the altitude will be override to 0. This can be useful if you don't have a DEM or provide a new one when converting (with Layer.convert).
*/
/**
* Parse a GeoJSON file content and return a [FeatureCollection]{@link FeatureCollection}.
*
* @param {string} json - The GeoJSON file content to parse.
* @param {GeoJsonParser~GeoJsonParserOptions} options - Options controlling
* the parsing.
*
* @return {Promise} A promise resolving with a [FeatureCollection]{@link FeatureCollection}.
*/
parse: function parse(json) {
var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
var crsOut = options.crsOut;
var filteringExtent = options.filteringExtent;
if (typeof json === 'string') {
json = JSON.parse(json);
}
options.crsIn = options.crsIn || readCRS(json);
options.mergeFeatures = options.mergeFeatures == undefined ? true : options.mergeFeatures;
options.withNormal = options.withNormal == undefined ? true : options.withNormal;
options.withAltitude = options.withAltitude == undefined ? true : options.withAltitude;
switch (json.type.toLowerCase()) {
case 'featurecollection':
return Promise.resolve(jsonFeaturesToFeatures(options.crsIn, crsOut, json.features, filteringExtent, options));
case 'feature':
return Promise.resolve(jsonFeaturesToFeatures(options.crsIn, crsOut, [json], filteringExtent, options));
default:
throw new Error("Unsupported GeoJSON type: '".concat(json.type));
}
}
};
exports["default"] = _default;