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Building Crowd-Sourcing and Social Media into your GIS @agup, @AL_Laframboise Agenda • Tweets and Geolocation • Using the Twitter APIs • Research and Development Anatomy of a tweet What’s happening? Downtown LA. Traffic accident on I10. Backed up for miles. Anyone know how the I60 is? #Traffic To whom? Geolocation? 34.0636 ‐117.5922 How do I access Twitter location data? Search API + geocode •Twitter geotag •Profile location •The tweet content (text and/or hashtags) REST API •User status STREAMS API •locations (bounding box) Architectures for integrated Tweets • Client only Browser - Desktop (e.g. Adobe AIR) - • Client/Server Client-only Web Client Geo Services Web Basemap ArcGIS Server ArcGIS Online Twitter Geodatabase Demo http://esriurl.com/twittersearchwidget Twitter Search by Location/Radius http://search.twitter.com/search.atom?geocode=37.781157,-122.398720,1mi ‘ Geolocation enabled 37.786600, -122.397200 37.7866 -122.3972 ‘ Geolocation not enabled ÜT: 37.784495,-122.393847 Geo-components of radius search payload tag:search.twitter.com,2005:45270965835407360 2011-03-08T23:53:34Z @AvaAddams even tho prefer the usual size, thanks for sharing the pic :) <a href="http://twitter.com/AvaAddams">@AvaAddams</a> even tho prefer the usual size, thanks for sharing the pic :) 2011-03-08T23:53:34Z 37.786600, -122.397200 37.7866 -122.3972 * * * * Twitter Search by Keyword http://search.twitter.com/search.atom?q=devsummit ‘ Geolocation enabled 37.7866 -122.3972 ‘ Geolocation not enabled Geo-components of keyword search payload tag:search.twitter.com,2005:45341439764348929 2011-03-09T04:33:36Z RT @timoreilly: Cool hack by @sharpgis lets you control a map, kinect-style. I try it. Pic via @RyanResella http://bit.ly/eKvs4v at ESRI #devsummit RT <a ........ 2011-03-09T04:33:36Z * * * * Twitter Status by Id http://api.twitter.com/1/statuses/show/45341439764348929.xml?include_entities=true 2384071 Tim O'Reilly timoreilly Sebastopol, CA * * * true Client-side Twitter Request (GET or POST) try { var reqURI:String = PROXY_SERVER + "tweetcmd.php?" + attrs; var httpService:HTTPService = new HTTPService; httpService.url = reqURI; httpService.requestTimeout = 30; httpService.useProxy = false; httpService.method = "GET"; httpService.resultFormat = "text"; //IMPORTANT: you must use the 'text' value httpService.addEventListener( "result", twitterSearchResult ); httpService.addEventListener( "fault", twitterSearchFault ); httpService.showBusyCursor = true; httpService.send(); } catch( error:Error ) { dispatchEvent(new TweetEvent(TweetEvent.SEARCH_FAILED,error.getStackTrace())); } Client-side Response Parsing (XML or JSON) for each(var element:Object in atom.entries) { //trace("atom: " + element.xml); //just for debugging var geometry:String = ""; var baseNode:XMLList = element.xml; var id:String = element.id; var title:String = element.title; var imageURL:String = element.links[1].href; var nameTemporary:String = element.authors[0].name; var name:String = (nameTemporary).split(" " )[0]; var published:String = publishedDateFormatter(element.published); var google:Namespace = baseNode.namespace("google"); var twitter:Namespace = baseNode.namespace("twitter"); var googleLocation:String = baseNode.google::location; var geoLocation:XMLList = baseNode.twitter::geo; //To prevent parsing errors if(geoLocation.namespace("georss")) { var geoNS:Namespace = geoLocation.namespace("georss"); twitterLocation = geoLocation.geoNS::point; } ** ** ** Research and Development ArcGIS Explorer ArcGIS Explorer – Twitter Add-in http://tinyurl.com/agxtwitter Framework Login (oAuth) Token Authorization Cache Getting Friends and Favorites (oAuth) Friends Favorites Search by distance or keyword (oAuth) Search by Radius - Optional keyword Search - Optional keyword GeoTagging – Are you enabled? Ask user! See Twitter dev guide! GeoTagging Tweets Append coordinates Users must geo-enable (opt-in) accounts string url = http://api.twitter.com/statuses/update.xml; string status = “At the Devsummit learning lots of cool things… #devsummit”; string request = string.Format("lat={0}&long={1}&status={2}", lat, lon, status); ‘ Geolocation enabled 34.056758 -117.196006 ‘ Geolocation not enabled 34.0636 ‐117.5922 Geolocation = Spatial Context Learn more… http://support.twitter.com/forums/26810/entries/78525 Features Geocode Tweets Search Float or Pin GeoTag Tweets Show Notes Show GeoTag Zoom Levels 2D/3D Follow Users Unfollow Users Challenges • Point dispersion • Paging (1500) • Storage • Search Limitations (7-days) • Rate Limits Development Considerations • Choose Twitter API(s) • Native HTTP request/response • Authentication • Parsing out location data • Rate Limits - • IP Address Whitelisting (contact Twitter)* Storing data limitations (contact Twitter)* *Email: api@twitter.com Questions