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| .h2 OpenLayers Timeline | ||
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| OpenLayers Timeline is a simple library to create a time related map with OpenLayers. | ||
| Currently it supports source data from GeoJSON or GeoRSS. | ||
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| See a demo at http://volpino.github.com/openlayers-timeline/ | ||
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| .h3 Deps | ||
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| * jQuery | ||
| * jQuery-UI Slider | ||
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| .h3 Basic Usage | ||
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| * Include dependancies | ||
| * create a OpenLayers Timeline object | ||
| * initialize Timeline and enjoy! | ||
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| .h3 API Documentation | ||
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| Write me! | ||
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| .h3 Contribute! | ||
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| Feel free to fork, report bugs, send patches or suggestions :D |
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| <!DOCTYPE html> | ||
| <html> | ||
| <head> | ||
| <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> | ||
| <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0"> | ||
| <meta name="apple-mobile-web-app-capable" content="yes"> | ||
| <link rel="stylesheet" href="css/ui-lightness/jquery-ui-1.8.13.custom.css" type="text/css" /> | ||
| <link rel="stylesheet" href="http://openlayers.org/dev/theme/default/style.css" type="text/css" /> | ||
| <link rel="stylesheet" href="css/style.css" type="text/css" /> | ||
| <script src="lib/jquery-1.4.4.min.js" type="text/javascript"></script> | ||
| <script src="lib/jquery-ui-1.8.14.custom.min.js" type="text/javascript"></script> | ||
| <script src="http://openlayers.org/api/OpenLayers.js" type="text/javascript"></script> | ||
| <script src="lib/OpenLayers.Format.GeoJSONTimeline.js" type="text/javascript"></script> | ||
| <script src="timeline.js" type="text/javascript"></script> | ||
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| <script type="text/javascript"> | ||
| var map, timeline; | ||
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| function init(){ | ||
| map = new OpenLayers.Map('map'); | ||
| layer = new OpenLayers.Layer.WMS( "OpenLayers WMS", | ||
| "http://vmap0.tiles.osgeo.org/wms/vmap0", | ||
| {layers: 'basic'}, {numZoomLevels: 5}); | ||
| map.addLayer(layer); | ||
| map.setCenter(new OpenLayers.LonLat(0, 0), 2); | ||
| timeline = new OpenLayers.Timeline({map: map, | ||
| timeline: "#timeline", | ||
| date_key: "when", | ||
| format: OpenLayers.Format.GeoJSONTimeline}); | ||
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| var url = "http://toolserver.org/~sonet/api_geojson.php?article=OpenLayers&callback=?"; | ||
| $.getJSON(url, function(data) { | ||
| $("#status").text("Data loaded"); | ||
| timeline.initTimeline(data); | ||
| }); | ||
| } | ||
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| function toggleCumulative() { | ||
| if ($("#cumulative").attr("checked")) { | ||
| timeline.cumulative = true; | ||
| } | ||
| else { | ||
| timeline.cumulative = false; | ||
| } | ||
| timeline.update(); | ||
| } | ||
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| $(document).ready(function() { | ||
| init(); | ||
| timeline.cumulative = true; | ||
| $("#cumulative").attr("checked", "checked"); | ||
| }); | ||
| </script> | ||
| </head> | ||
| <body> | ||
| <h1 id="title">OpenLayers Timeline GeoJSON Demo</h1> | ||
| <div id="container"> | ||
| <p> | ||
| The source of the data is <a href="http://toolserver.org/~sonet/api_geojson.php">Toolserver</a>. | ||
| It represents anonymous edits on the OpenLayers Wikipedia page. | ||
| </p> | ||
| <p id="status">Loading...</p> | ||
| <div id="controls"> | ||
| <input type="button" onclick="timeline.togglePlay();" value="Play/Pause" /> | ||
| <input type="button" onclick="timeline.fasterAnimation();" value="Faster" /> | ||
| <input type="button" onclick="timeline.slowerAnimation();" value="Slower" /> | ||
| <label for="cumulative">Cumulative</label> | ||
| <input id="cumulative" type="checkbox" onChange="toggleCumulative();" /> | ||
| </div> | ||
| <div id="timeline"></div> | ||
| <div id="map" class="smallmap"></div> | ||
| </div> | ||
| </body> | ||
| </html> | ||
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| /** | ||
| * Copyright (C) 2008, 2009 FBK Foundation, (http://www.fbk.eu) | ||
| * Author: Federico Scrinzi @ SoNet Group | ||
| * | ||
| * OpenLayers-Timeline is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU Affero General Public License as published by | ||
| * the Free Software Foundation version 3 of the License. | ||
| */ | ||
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| /** | ||
| * Class: OpenLayers.Format.GeoJSONTimeline | ||
| * This class represents a GeoJSON format with time support | ||
| */ | ||
| OpenLayers.Format.GeoJSONTimeline = OpenLayers.Class(OpenLayers.Format.GeoJSON, { | ||
| past_seconds: 0, | ||
| date_key: "when", | ||
| first: undefined, | ||
| lowerlimit: undefined, | ||
| timestamp_funct: undefined, | ||
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| read: function(json, type, filter) { | ||
| type = (type) ? type : "FeatureCollection"; | ||
| var results = null; | ||
| var obj = null; | ||
| if (typeof json == "string") { | ||
| obj = OpenLayers.Format.JSON.prototype.read.apply(this, | ||
| [json, filter]); | ||
| } else { | ||
| obj = json; | ||
| } | ||
| if(!obj) { | ||
| OpenLayers.Console.error("Bad JSON: " + json); | ||
| } else if(typeof(obj.type) != "string") { | ||
| OpenLayers.Console.error("Bad GeoJSON - no type: " + json); | ||
| } else if(this.isValidType(obj, type)) { | ||
| switch(type) { | ||
| case "Geometry": | ||
| try { | ||
| results = this.parseGeometry(obj); | ||
| } catch(err) { | ||
| OpenLayers.Console.error(err); | ||
| } | ||
| break; | ||
| case "Feature": | ||
| try { | ||
| results = this.parseFeature(obj); | ||
| results.type = "Feature"; | ||
| } catch(err) { | ||
| OpenLayers.Console.error(err); | ||
| } | ||
| break; | ||
| case "FeatureCollection": | ||
| // for type FeatureCollection, we allow input to be any type | ||
| results = []; | ||
| switch(obj.type) { | ||
| case "Feature": | ||
| try { | ||
| var r = this.parseFeature(obj); | ||
| if (r) { | ||
| results.push(r); | ||
| } | ||
| } catch(err) { | ||
| results = null; | ||
| OpenLayers.Console.error(err); | ||
| } | ||
| break; | ||
| case "FeatureCollection": | ||
| for(var i=0, len=obj.features.length; i<len; ++i) { | ||
| try { | ||
| var r = this.parseFeature(obj.features[i]); | ||
| if (r) { | ||
| results.push(r); | ||
| } | ||
| } catch(err) { | ||
| results = null; | ||
| OpenLayers.Console.error(err); | ||
| } | ||
| } | ||
| break; | ||
| default: | ||
| try { | ||
| var geom = this.parseGeometry(obj); | ||
| results.push(new OpenLayers.Feature.Vector(geom)); | ||
| } catch(err) { | ||
| results = null; | ||
| OpenLayers.Console.error(err); | ||
| } | ||
| } | ||
| break; | ||
| } | ||
| } | ||
| return results; | ||
| }, | ||
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| parseFeature: function(obj) { | ||
| var feature, geometry, attributes, bbox, when; | ||
| attributes = (obj.properties) ? obj.properties : {}; | ||
| when = attributes[this.date_key]; | ||
| if (this.timestamp_funct) { | ||
| when = this.timestamp_funct(when); | ||
| } | ||
| if (when) { | ||
| if (!this.first || this.first > when) { | ||
| this.first = when; | ||
| } | ||
| if (when > this.past_seconds) { | ||
| return; | ||
| } | ||
| if (this.lowerlimit && when < this.lowerlimit) { | ||
| return; | ||
| } | ||
| } | ||
| bbox = (obj.geometry && obj.geometry.bbox) || obj.bbox; | ||
| try { | ||
| geometry = this.parseGeometry(obj.geometry); | ||
| } catch(err) { | ||
| // deal with bad geometries | ||
| throw err; | ||
| } | ||
| feature = new OpenLayers.Feature.Vector(geometry, attributes); | ||
| if(bbox) { | ||
| feature.bounds = OpenLayers.Bounds.fromArray(bbox); | ||
| } | ||
| if(obj.id) { | ||
| feature.fid = obj.id; | ||
| } | ||
| return feature; | ||
| }, | ||
| CLASS_NAME: "OpenLayers.Format.GeoJSONTimeline" | ||
| }); |
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