[Mapbender-commits] r8973 - trunk/mapbender/http/extensions
svn_mapbender at osgeo.org
svn_mapbender at osgeo.org
Wed Jul 2 04:54:49 PDT 2014
Author: hwbllmnn
Date: 2014-07-02 04:54:49 -0700 (Wed, 02 Jul 2014)
New Revision: 8973
Added:
trunk/mapbender/http/extensions/togeojson.js
Log:
added togeojson
Added: trunk/mapbender/http/extensions/togeojson.js
===================================================================
--- trunk/mapbender/http/extensions/togeojson.js (rev 0)
+++ trunk/mapbender/http/extensions/togeojson.js 2014-07-02 11:54:49 UTC (rev 8973)
@@ -0,0 +1,288 @@
+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) {
+ if (!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) { if (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');
+ if (ele) ll.push(parseFloat(nodeVal(ele)));
+ return ll;
+ }
+
+ // create a new feature collection parent object
+ function fc() {
+ return {
+ type: 'FeatureCollection',
+ features: []
+ };
+ }
+
+ var serializer;
+ if (typeof XMLSerializer !== 'undefined') {
+ serializer = new XMLSerializer();
+ // only require xmldom in a node environment
+ } else if (typeof exports === 'object' && typeof process === 'object' && !process.browser) {
+ serializer = new (require('xmldom').XMLSerializer)();
+ }
+ function xml2str(str) { return serializer.serializeToString(str); }
+
+ var t = {
+ kml: function(doc, o) {
+ o = o || {};
+
+ 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'],
+ // 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 = [];
+ for (var i = 0; i < elems.length; i++) coords.push(gxCoord(nodeVal(elems[i])));
+ return coords;
+ }
+ function getGeometry(root) {
+ var geomNode, geomNodes, i, j, k, geoms = [];
+ if (get1(root, 'MultiGeometry')) return getGeometry(get1(root, 'MultiGeometry'));
+ if (get1(root, 'MultiTrack')) return getGeometry(get1(root, 'MultiTrack'));
+ for (i = 0; i < geotypes.length; i++) {
+ geomNodes = get(root, geotypes[i]);
+ if (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 if (geotypes[i] == 'Track') {
+ geoms.push({
+ type: 'LineString',
+ coordinates: gxCoords(geomNode)
+ });
+ }
+ }
+ }
+ }
+ return geoms;
+ }
+ function getPlacemark(root) {
+ var geoms = 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 (!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')));
+ if (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;
+ if (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]);
+ }
+ }
+ return [{
+ type: 'Feature',
+ geometry: (geoms.length === 1) ? geoms[0] : {
+ type: 'GeometryCollection',
+ geometries: geoms
+ },
+ properties: properties
+ }];
+ }
+ return gj;
+ },
+ gpx: function(doc, o) {
+ var i,
+ tracks = get(doc, 'trk'),
+ routes = get(doc, 'rte'),
+ waypoints = get(doc, 'wpt'),
+ // a feature collection
+ gj = fc();
+ for (i = 0; i < tracks.length; i++) {
+ gj.features.push(getTrack(tracks[i]));
+ }
+ for (i = 0; i < routes.length; i++) {
+ gj.features.push(getRoute(routes[i]));
+ }
+ for (i = 0; i < waypoints.length; i++) {
+ gj.features.push(getPoint(waypoints[i]));
+ }
+ function getPoints(node, pointname) {
+ var pts = get(node, pointname), line = [];
+ for (var i = 0; i < pts.length; i++) {
+ line.push(coordPair(pts[i]));
+ }
+ return line;
+ }
+ function getTrack(node) {
+ var segments = get(node, 'trkseg'), track = [];
+ for (var i = 0; i < segments.length; i++) {
+ track.push(getPoints(segments[i], 'trkpt'));
+ }
+ return {
+ type: 'Feature',
+ properties: getProperties(node),
+ geometry: {
+ type: track.length === 1 ? 'LineString' : 'MultiLineString',
+ coordinates: track.length === 1 ? track[0] : track
+ }
+ };
+ }
+ function getRoute(node) {
+ return {
+ type: 'Feature',
+ properties: getProperties(node),
+ geometry: {
+ type: 'LineString',
+ coordinates: getPoints(node, 'rtept')
+ }
+ };
+ }
+ function getPoint(node) {
+ var prop = getProperties(node);
+ prop.sym = nodeVal(get1(node, 'sym'));
+ return {
+ type: 'Feature',
+ properties: prop,
+ geometry: {
+ type: 'Point',
+ coordinates: coordPair(node)
+ }
+ };
+ }
+ 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;
+})();
+
+if (typeof module !== 'undefined') module.exports = toGeoJSON;
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