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| toGeoJSON = (function() {
'use strict';
var removeSpace = (/\s*/g),
trimSpace = (/^\s*|\s*$/g),
splitSpace = (/\s+/);
// generate a short, numeric hash of a string
function okhash(x) {
Iif (!x || !x.length) return 0;
for (var i = 0, h = 0; i < x.length; i++) {
h = ((h << 5) - h) + x.charCodeAt(i) | 0;
} return h;
}
// all Y children of X
function get(x, y) { return x.getElementsByTagName(y); }
function attr(x, y) { return x.getAttribute(y); }
function attrf(x, y) { return parseFloat(attr(x, y)); }
// one Y child of X, if any, otherwise null
function get1(x, y) { var n = get(x, y); return n.length ? n[0] : null; }
// https://developer.mozilla.org/en-US/docs/Web/API/Node.normalize
function norm(el) { Eif (el.normalize) { el.normalize(); } return el; }
// cast array x into numbers
function numarray(x) {
for (var j = 0, o = []; j < x.length; j++) o[j] = parseFloat(x[j]);
return o;
}
function clean(x) {
var o = {};
for (var i in x) if (x[i]) o[i] = x[i];
return o;
}
// get the content of a text node, if any
function nodeVal(x) {
if (x) { norm(x); }
return (x && x.firstChild && x.firstChild.nodeValue) || '';
}
// get one coordinate from a coordinate array, if any
function coord1(v) { return numarray(v.replace(removeSpace, '').split(',')); }
// get all coordinates from a coordinate array as [[],[]]
function coord(v) {
var coords = v.replace(trimSpace, '').split(splitSpace),
o = [];
for (var i = 0; i < coords.length; i++) {
o.push(coord1(coords[i]));
}
return o;
}
function coordPair(x) {
var ll = [attrf(x, 'lon'), attrf(x, 'lat')],
ele = get1(x, 'ele'),
heartRate = get1(x, 'gpxtpx:hr'),
time = get1(x, 'time');
if (ele) ll.push(parseFloat(nodeVal(ele)));
return {
coordinates: ll,
time: time ? nodeVal(time) : null,
heartRate: heartRate ? parseFloat(nodeVal(heartRate)) : null
};
}
// create a new feature collection parent object
function fc() {
return {
type: 'FeatureCollection',
features: []
};
}
var serializer;
Iif (typeof XMLSerializer !== 'undefined') {
serializer = new XMLSerializer();
// only require xmldom in a node environment
} else Eif (typeof exports === 'object' && typeof process === 'object' && !process.browser) {
serializer = new (require('xmldom').XMLSerializer)();
}
function xml2str(str) {
// IE9 will create a new XMLSerializer but it'll crash immediately.
Iif (str.xml !== undefined) return str.xml;
return serializer.serializeToString(str);
}
var t = {
kml: function(doc) {
var gj = fc(),
// styleindex keeps track of hashed styles in order to match features
styleIndex = {},
// atomic geospatial types supported by KML - MultiGeometry is
// handled separately
geotypes = ['Polygon', 'LineString', 'Point', 'Track', 'gx:Track'],
// all root placemarks in the file
placemarks = get(doc, 'Placemark'),
styles = get(doc, 'Style');
for (var k = 0; k < styles.length; k++) {
styleIndex['#' + attr(styles[k], 'id')] = okhash(xml2str(styles[k])).toString(16);
}
for (var j = 0; j < placemarks.length; j++) {
gj.features = gj.features.concat(getPlacemark(placemarks[j]));
}
function kmlColor(v) {
var color, opacity;
v = v || "";
if (v.substr(0, 1) === "#") v = v.substr(1);
if (v.length === 6 || v.length === 3) color = v;
if (v.length === 8) {
opacity = parseInt(v.substr(0, 2), 16) / 255;
color = v.substr(2);
}
return [color, isNaN(opacity) ? undefined : opacity];
}
function gxCoord(v) { return numarray(v.split(' ')); }
function gxCoords(root) {
var elems = get(root, 'coord', 'gx'), coords = [], times = [];
Eif (elems.length === 0) elems = get(root, 'gx:coord');
for (var i = 0; i < elems.length; i++) coords.push(gxCoord(nodeVal(elems[i])));
var timeElems = get(root, 'when');
for (var i = 0; i < timeElems.length; i++) times.push(nodeVal(timeElems[i]));
return {
coords: coords,
times: times
};
}
function getGeometry(root) {
var geomNode, geomNodes, i, j, k, geoms = [], coordTimes = [];
if (get1(root, 'MultiGeometry')) return getGeometry(get1(root, 'MultiGeometry'));
Iif (get1(root, 'MultiTrack')) return getGeometry(get1(root, 'MultiTrack'));
if (get1(root, 'gx:MultiTrack')) return getGeometry(get1(root, 'gx:MultiTrack'));
for (i = 0; i < geotypes.length; i++) {
geomNodes = get(root, geotypes[i]);
Eif (geomNodes) {
for (j = 0; j < geomNodes.length; j++) {
geomNode = geomNodes[j];
if (geotypes[i] == 'Point') {
geoms.push({
type: 'Point',
coordinates: coord1(nodeVal(get1(geomNode, 'coordinates')))
});
} else if (geotypes[i] == 'LineString') {
geoms.push({
type: 'LineString',
coordinates: coord(nodeVal(get1(geomNode, 'coordinates')))
});
} else if (geotypes[i] == 'Polygon') {
var rings = get(geomNode, 'LinearRing'),
coords = [];
for (k = 0; k < rings.length; k++) {
coords.push(coord(nodeVal(get1(rings[k], 'coordinates'))));
}
geoms.push({
type: 'Polygon',
coordinates: coords
});
} else Eif (geotypes[i] == 'Track' ||
geotypes[i] == 'gx:Track') {
var track = gxCoords(geomNode);
geoms.push({
type: 'LineString',
coordinates: track.coords
});
Eif (track.times.length) coordTimes.push(track.times);
}
}
}
}
return {
geoms: geoms,
coordTimes: coordTimes
};
}
function getPlacemark(root) {
var geomsAndTimes = getGeometry(root), i, properties = {},
name = nodeVal(get1(root, 'name')),
styleUrl = nodeVal(get1(root, 'styleUrl')),
description = nodeVal(get1(root, 'description')),
timeSpan = get1(root, 'TimeSpan'),
extendedData = get1(root, 'ExtendedData'),
lineStyle = get1(root, 'LineStyle'),
polyStyle = get1(root, 'PolyStyle');
if (!geomsAndTimes.geoms.length) return [];
if (name) properties.name = name;
if (styleUrl && styleIndex[styleUrl]) {
properties.styleUrl = styleUrl;
properties.styleHash = styleIndex[styleUrl];
}
if (description) properties.description = description;
if (timeSpan) {
var begin = nodeVal(get1(timeSpan, 'begin'));
var end = nodeVal(get1(timeSpan, 'end'));
properties.timespan = { begin: begin, end: end };
}
if (lineStyle) {
var linestyles = kmlColor(nodeVal(get1(lineStyle, 'color'))),
color = linestyles[0],
opacity = linestyles[1],
width = parseFloat(nodeVal(get1(lineStyle, 'width')));
Eif (color) properties.stroke = color;
if (!isNaN(opacity)) properties['stroke-opacity'] = opacity;
if (!isNaN(width)) properties['stroke-width'] = width;
}
if (polyStyle) {
var polystyles = kmlColor(nodeVal(get1(polyStyle, 'color'))),
pcolor = polystyles[0],
popacity = polystyles[1],
fill = nodeVal(get1(polyStyle, 'fill')),
outline = nodeVal(get1(polyStyle, 'outline'));
if (pcolor) properties.fill = pcolor;
if (!isNaN(popacity)) properties['fill-opacity'] = popacity;
Eif (fill) properties['fill-opacity'] = fill === "1" ? 1 : 0;
if (outline) properties['stroke-opacity'] = outline === "1" ? 1 : 0;
}
if (extendedData) {
var datas = get(extendedData, 'Data'),
simpleDatas = get(extendedData, 'SimpleData');
for (i = 0; i < datas.length; i++) {
properties[datas[i].getAttribute('name')] = nodeVal(get1(datas[i], 'value'));
}
for (i = 0; i < simpleDatas.length; i++) {
properties[simpleDatas[i].getAttribute('name')] = nodeVal(simpleDatas[i]);
}
}
if (geomsAndTimes.coordTimes.length) {
properties.coordTimes = (geomsAndTimes.coordTimes.length === 1) ?
geomsAndTimes.coordTimes[0] : geomsAndTimes.coordTimes;
}
var feature = {
type: 'Feature',
geometry: (geomsAndTimes.geoms.length === 1) ? geomsAndTimes.geoms[0] : {
type: 'GeometryCollection',
geometries: geomsAndTimes.geoms
},
properties: properties
};
if (attr(root, 'id')) feature.id = attr(root, 'id');
return [feature];
}
return gj;
},
gpx: function(doc) {
var i,
tracks = get(doc, 'trk'),
routes = get(doc, 'rte'),
waypoints = get(doc, 'wpt'),
// a feature collection
gj = fc(),
feature;
for (i = 0; i < tracks.length; i++) {
feature = getTrack(tracks[i]);
if (feature) gj.features.push(feature);
}
for (i = 0; i < routes.length; i++) {
feature = getRoute(routes[i]);
Eif (feature) gj.features.push(feature);
}
for (i = 0; i < waypoints.length; i++) {
gj.features.push(getPoint(waypoints[i]));
}
function getPoints(node, pointname) {
var pts = get(node, pointname),
line = [],
times = [],
heartRates = [],
l = pts.length;
if (l < 2) return {}; // Invalid line in GeoJSON
for (var i = 0; i < l; i++) {
var c = coordPair(pts[i]);
line.push(c.coordinates);
if (c.time) times.push(c.time);
if (c.heartRate) heartRates.push(c.heartRate);
}
return {
line: line,
times: times,
heartRates: heartRates
};
}
function getTrack(node) {
var segments = get(node, 'trkseg'),
track = [],
times = [],
heartRates = [],
line;
for (var i = 0; i < segments.length; i++) {
line = getPoints(segments[i], 'trkpt');
if (line.line) track.push(line.line);
if (line.times && line.times.length) times.push(line.times);
if (line.heartRates && line.heartRates.length) heartRates.push(line.heartRates);
}
if (track.length === 0) return;
var properties = getProperties(node);
if (times.length) properties.coordTimes = track.length === 1 ? times[0] : times;
if (heartRates.length) properties.heartRates = heartRates;
return {
type: 'Feature',
properties: properties,
geometry: {
type: track.length === 1 ? 'LineString' : 'MultiLineString',
coordinates: track.length === 1 ? track[0] : track
}
};
}
function getRoute(node) {
var line = getPoints(node, 'rtept');
Iif (!line) return;
var routeObj = {
type: 'Feature',
properties: getProperties(node),
geometry: {
type: 'LineString',
coordinates: line
}
};
Iif (line.times.length) routeObj.geometry.times = line.times;
return routeObj;
}
function getPoint(node) {
var prop = getProperties(node);
prop.sym = nodeVal(get1(node, 'sym'));
return {
type: 'Feature',
properties: prop,
geometry: {
type: 'Point',
coordinates: coordPair(node).coordinates
}
};
}
function getProperties(node) {
var meta = ['name', 'desc', 'author', 'copyright', 'link',
'time', 'keywords'],
prop = {},
k;
for (k = 0; k < meta.length; k++) {
prop[meta[k]] = nodeVal(get1(node, meta[k]));
}
return clean(prop);
}
return gj;
}
};
return t;
})();
Eif (typeof module !== 'undefined') module.exports = toGeoJSON;
|