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UT INF 385T - GIS, Maps and Mapping Mashups

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GIS Maps Mapping Mashups Brian Lewis Semantic Web Technologies April 17 2006 Overview What is a mashup Examples GIS Map and Mapping Mashups Geospatial basics Mashup characteristics Predictions Creating mashups What is a mashup Website or web application that combines content from more than one source Application hybrids created by third parties by accessing public APIs Lightweight web services Examples http upcoming org event 61489 http www mashupcoming com upmap htm http www programmableweb com http www mashupfeed com http googlemapsmania blogspot com http gpsvisualizer com examples http developer yahoo net maps applica tions html http ace engin umich edu gmaps pierpont arrivals php Mashup framework QuickTime and a TIFF Uncompressed decompressor are needed to see this picture Berlind 2006 January 27 GIS Map Mapping Mashups Just a mashup that involves GIS data GIS Geographic Information System Geospatial information about the geographic location of an entity Mitchell 2005 Terms spatial data geographic data geographic information system data map data coordinate data and spatial geometry data Mitchell 2005 Geospatial basics Not just maps Geospatial data analysis Different methods of describing geospatial data Two types of geospatial data raster and vector Why all the fuss Mapping and analysis is not new Combining and sharing GIS data is also not new Geospatially focused hardware and software not new What is new GPS receivers are commonplace Costs are low Visibility is high google maps Technology is accessible Potential is extensive fun and useful What is new Dynamic lightweight models for combining content Zero footprint Visibility is high mainstream press Network effects Opportunities No central control Low technical barriers to entry Free data Not geographically limited No ads Challenges No central control Low technical barriers to entry Free data Not geographically limited No ads Others Other viability issues Consistency issues Legal issues Revenue issues Competition issues Trust issues Others How Semantic is it Not Very No UDDI Not machine discoverable Overlay or combination of data Not understood in any real way So why is it in this class A stepping stone to web services Web as a platform Opening APIs Use of standards SOAP XML Demonstrates the usefulness of sharing data Others Predictions Universal registry for mashup APIs Mashup tools arrive Disruptive effects will affect slow adopters RSS becomes the mashup protocol of choice Intellectual property issues persist Creating a mashup Look for the APIs 168 as of 03 05 2006 http www programmableweb com apis http www mashupfeed com Get an application ID API key Sometimes not necessary Often free Read the documentation Limits of the service rate limit location limit use How to structure your query Mash away Creating a mashup APIs Provides an interface and a set of rules that make it easier to extract data from a website Simple or relatively complicated Many tools to build maps w o coding Submit data to a URL via GET or POST returns XML Access methods via a scripting language Utilize different technologies JavaScript PHP Flash JavaScript ActionScript Java More Different restrictions Not for profit only Maximum time based request limit Limits on the data source Others A Simple Example Request a Google Maps API Key http www google com apis maps Returns a page with your key a path for which URLs are valid and sample code to work with Copy this information somewhere paste into a text file script src http maps google com maps file api v 1 key ABQIAA blahblah 6w type text javascript script div id map style width 500px height 400px div script type text javascript CDATA var map new GMap document getElementById map map addControl new GSmallMapControl map centerAndZoom new GPoint 122 1419 37 4419 4 script Read the documentation http www google com apis maps documentation How to locate Google s JavaScript file identifies you to Google through the key ID script src http maps google com maps file api v 1 key ABQIAA blahblah 6w type text javascript script Where the map will appear on your page div id map style width 500px height 400px div Read the documentation Draws the map Instantiates the map and assigns it to the div Adds the controls Centers the map and sets the zoom level script type text javascript CDATA var map new GMap document getElementById map map addControl new GSmallMapControl map centerAndZoom new GPoint 122 1419 37 4419 4 script Results Dig in Change the center point of the map and the zoom level map centerAndZoom new GPoint 97 739868 30 280935 2 Add an overlay marker at a specific location var marker new Gmarker new Gpoint 97 738452 30 281269 map addOverlay marker Add an info window text bubble thingie marker openInfoWindow document createTextNode Text here View your results Based from Joshua Siler s tutorial and Google s API Documentation Dig in deeper Note This is not a real mashup But it does introduce you to the API Play This could be done w o code using map builder which IS a mashup Google s API provides much more functionality than this More Tutorials http www programmableweb com howto http www theurer cc blog 2005 11 03 how to build a maps m ash up Jon Udell s screencast Java for Google Maps Mashups Charlottetown Transit Map explanation php http www flickrmap com tutorials google earth php References Berlind D 2006 February 1 Rethinking BPM in a mashup based SOA world Retrieved March 4 2006 from ZDNet Web site http blogs zdnet com BTL p 2517 Berlind D 2006 January 27 Mashup ecosystem poised to explode ZDNet Retrieved February 27 2006 from http blogs zdnet com BTL p 2484 Butler D 2006 January 5 Mashups mix data into global service Retrieved March 4 2006 from http www nature com nature journal v439 n7072 full 439006a html Farber D 2006 February 20 Mashups and the law Retrieved March 4 2006 from ZDNet Web site http blogs zdnet com BTL p 2614 Hinchcliffe D 2006 Feb 20 Some predictions for the coming mashosphere Retrieved April 9 2006 from ZDNet Website http blogs zdnet com Hinchcliffe p 13 Hinchcliffe D 2006 Feb 5 The Web 2 0 mashup ecosystem ramps up Retrieved March 20 2006 from Web 2 0 journal http www web2journal com read 179109 htm References MacManus R 2006 March 2 Mashups who s really in control Retrieved March 4 2006 from ZDNet Web site http blogs zdnet com web2explorer p 128 Mitchell T 2005 May 11 Demystifying geospatial the basics Retrieved March 5 2006 from O Reilly Digital Media Web site http www oreillynet com


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