Blog Posts by Dan Theurer

  • Fire Eagle: Open location for all

    fireeagle_betalogo_final_smallIf you're at ETech today, you probably heard Tom Coates announce the developer beta launch of Fire Eagle. We are excited to be releasing Fire Eagle by invitation to developers now.

    Fire Eagle is an open location services platform offering web, mobile, and desktop developers a simple way to build new location-based applications while also ensuring that consumers have complete control over their data, including how, when and where their location is made available. Want to easily make your site responsive to a user's location? Or, maybe you've found a way to capture someone's location and you want to find cool apps to plug it into? By doing the heavy lifting and connecting you to a community of geo-developers, Fire Eagle makes it easier to build location-aware services.

    If you're attending ETech, come talk to us. You can spot us by our stylish t-shirts or find us at the Yahoo! booth. To find out more about how Fire Eagle works or whip up a Fire Eagle application of your own, come to

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  • Announcing the Silverlight Developer Center

    Last year the MIX07 conference had lots of exciting news for Rich Internet Application developers. MIX08 starts this week and we're happy to announce our new Developer center aimed at Silverlight 1.0 while we wait for the final release of version 2.0. Our goal was to create a starting point and handy reference for learning and using Silverlight. We cover all the basics and have lots of samples and links to other resources on the web.

    There's also a special treat for code junkies. We made a class diagram poster covering all the Silverlight 1.0 classes and made it available in multiple formats. So feel free to appropriate the company plotter and decorate your cube (Umm, okay. Ask for permission first). The classes are also grouped into the currently known 2.0 namespaces to help you transition when the time comes.

    Tomi Blinnikka
    Y! Media Innovation Group

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  • Geo-hackers – The Zonetag API Goes Public

    ZoneTag is a little prototype that was developed by Yahoo! Research Berkeley. A look under the hood shows that it's built on top of a couple of interesting APIs that we're opening up. Anything that ZoneTag can do, you could do as well.

    Want to know the location of a cell tower? Update the location of a cell tower? Get a list of suggested tags for a location? Open your web service to any mobile ZoneTag user without having to do mobile programming? It's all possible! Have a look at the documentation.

    Don't forget, WhereCampSF is happening this weekend. What better place to meet other geo-hackers and geo-enthusiasts, and play with ZoneTag location web services?

    Dan Theurer

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  • Yahoo! Research Berkeley unveils the World Explorer

    What happens if you automatically extract information from Flickr's geotagged images to create a rich visualization of the world we live in? It opens a window to explore the entire world through the eyes of the users of Flickr.

    The World Explorer uses public geotagged photos contributed to the world by the Flickr community, automatically extracts the tags that are relevant and representative for each map region or zoom level and connects these tags to the photos that represent that area.

    The best thing about it? The World Explorer is build on top of open APIs. It uses two main components. The TagMaps, a Flash/SWF object that visualizes tags (i.e., text terms) on a map and the open APIs.

    You can use the data APIs to get Flickr tags of any location, roll your own TagMaps based on a custom geoRSS data feed or create a badge for your blog, MySpace page or any other page that you want to pimp up.

    This embedded element is set to take you to Yosemite Valley in Yosemite National Park.


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  • Reminder: Action required – Flash applications need to use

    If your Flash application makes requests to any service endpoint hosted on, you must change it to the appropriate endpoint. Flash support on will end within the next 48 hours!

    Non-Flash applications will not be affected by this change. More details can be found in the original announcement.

    We apologize for the inconvenience.

    Dan Theurer

  • APIs found a new home on – Flash developers: Immediate action required

    When we launched our first APIs for Search, they were all located on With an API offer that is growing every month, we have to separate APIs and our consumer offerings to make both easier to manage. All services that we offered on are now available at as well. Please refer to the documentation for details. Starting today, new APIs, updates and bug fixes will only be available on the and in the mid-term we are planning to turn off the old endpoints so please update your applications as soon as possible.

    Important for Flash developers: You need to update your applications with the new endpoints by December 11th because will no longer support Flash calls after that date.

    We know that this will have a big impact for some of you and we apologize for that. Yahoo APIs infrastructure is still fairly new and we want to optimize the set-up now so that we don't have to make those changes in the

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  • getTime Service Updated

    Upon request we added the 'format' parameter to the getTime service that controls the return format of the timestamp. The choices are milliseconds since 1970 or a UNIX timestamp with seconds since 1970. This addition makes the timestamp easier to use in JavaScript because the Date Object counts time in milliseconds.

    Dan Theurer

  • Love All, Support All. The .NET Developer Center Is Here!

    Friends of Redmond, start your engines! Today we're launching our .NET developer center to help you kick start development with the Microsoft .NET Framework and Yahoo! services. We even threw in some XAML love for all you budding Windows Presentation Foundation devs. Feel the urge to use Browser-Based Authentication with ASP.NET? No problem, we've hooked you up with an easy to use class that will get you rolling onto the road of glory in no time. All the samples are available in C# and VB.NET online and in a downloadable Sample Browser application (with source, no less!).

    Also, we've got a brand spankin' new Yahoo! group: ydn-dotnet. Join, ask, contribute, and let us know what we can do to help.

    Tomi Blinnikka

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  • BBAuth’s best friend! The new Photos API

    Today is the day! The first API that launches publicly with BBAuth support is Yahoo! Photos. Developers can now write application that have read/write access to Yahoo! data! Since it is BBAuth enabled, users can grant third-party applications permission to work with their images.

    The Photos API supports broad search functionality, upload photos, tagging, modifying titles and descriptions and much more! Try it out today and let us know what you think.

    Dan Theurer

  • Our Users Can Be Your Users Too

    Millions of people around the world use Yahoo! every day. One reason is that a single user id and password gives them access to more content and services than you can get anywhere else. In fact, we small companies often say things like "if we only had a fraction of your users..."

    Now they can. Anyone can.

    Our Browser Based Authentication (BBAuth) is a generic mechanism that will allow users to grant 3rd party web-based applications access their Yahoo! data. There's already a similar mechanism in place on Flickr and used by services like MOO. BBAuth is the protocol that's going to open the door to doing the same thing for many Yahoo! branded services in the coming months. Stay tuned for those announcements. :-)

    Beyond that, BBAuth also makes it possible to use Yahoo! as a single sign-on for your site, thus removing a barrier to entry for a whole lot of people (over 200 million to be exact). This is still fairly experimental, so we'd love to get your feedback and input on how to

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