Simon Willison’s Weblog

Items tagged javascript, googlemaps

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Diffable: only download the deltas. JavaScript library for detecting and serving diffs to JavaScript rather than downloading large scripts every time a few lines of code are changed. “Using Diffable has reduced page load times in Google Maps by more than 1200 milliseconds (~25%). Note that this benefit only affects users that have an older version of the script in cache. For Google Maps that’s 20-25% of users.” # 11th July 2010, 12:19 pm

getlatlon.com commit dae961a... I’ve finally added an OpenStreetMap tab to getlatlon.com—here’s the diff, it turns out adding a custom OpenStreetMap layer to an existing Google Maps application only takes a few lines of boilerplate code. # 10th July 2010, 12:22 pm

AJAX APIs Playground. Ferociously useful collection of executable and editable example code for all(?) of Google’s JavaScript APIs, including Google Maps and the increasingly interesting Visualization API. # 22nd January 2009, 6:38 pm

Google’s Wikipedia and Panoramio layers are now available in the API. I really like their use of reverse domain style identifiers for the layer IDs: map.addOverlay(new GLayer(“org.wikipedia”)); # 2nd October 2008, 11:59 am

Capital Radio’s London Guide. Worth pointing out: the search / map interface on this page is one of the best examples of progressive enhancement I’ve ever seen. Try disabling JavaScript and see what happens. It seems like most developers just can’t be bothered with this kind of attention to detail these days, which disappoints me. # 29th August 2008, 1:48 am

MapIconMaker. Extension API that lets you programatically construct a Google Maps bubble marker icon with a custom size, gradient and stroke colour. Under the hood it uses the Google Chart API with the (undocumented?) “mm” chart type. # 11th August 2008, 8:48 am

Google Maps now shows photos and Wikipedia articles. Click the “More...” button. My first thought was “how do they get so many photo markers on the map?”—Firebug shows that they’re generating tiles on the server containing multiple photo markers, then when you click on one an Ajax call checks which photo is in that particular spot. # 14th May 2008, 7:10 pm

The Art & Science of JavaScript. The JavaScript book I contributed to is now shipping! My chapter describes how to build a Flickr / Google Maps mashup entirely using client-side code (via JSON-P). # 12th January 2008, 7:05 pm

ExtInfoWindow 1.0: Ajax powered, CSS customization. Finally, a semi-official way of creating customised info windows for the Google Maps API. You lose the default shadow but gain the ability to style the entire info window using CSS. # 15th December 2007, 12:22 pm

Unobtrusively Mapping Microformats with jQuery. My contribution to 24 ways: using Mapstraction to geocode hCards (extracted with jQuery) and plot them on a Google Map. # 12th December 2007, 12:28 am

Cross Domain Frame Communication with Fragment Identifiers. Google are using this crazy iframe/fragment trick for their new Mapplets API. # 31st May 2007, 2:15 pm