Mikel Maron’s talk at XTech 2006, GeoRSS : Geographically Encoded Objects for RSS Feeds, is now online. It’s a great introduction to what GeoRSS is, in case you haven’t been following closely. In his talk, Mikel looks at the relative merits of different geospatial markup languages:

There are of course other geodata formats in use, which deserve a look as alternatives to GeoRSS. KML is used in Google Earth, and loads of data layers have been published by an active community. However, KML is very tied to its application, with features specifically aimed for 3D spinny globes, and the spec is controlled by a single organization. GPX, for data interchange between GPS units, is again very tied to specifics of GPS units. GML is a feature rich vocabulary for encoding geographic information, but its complexity has been daunting for unversed developers, and its proper use misunderstood. GML is similar to RDF, defining a number of primitive objects that can be assembled into Profiles for particular purposes. In fact, a GML profile for GeoRSS is a result of the new standard.

[Minor fact check: KML support is native in NASA World Wind, and announced for ESRI ArcGIS Explorer.]

(And if that’s not enough standards, Technorati’s Tantek Çelik has proposed the “geo” microformat, based on the vCard format. [Via Geospatial Semantic Web Blog])

Meanwhile, the latest update to Microsoft’s Virtual Earth supports GeoRSS, and so does Yahoo!’s Maps API. Support for Google Earth is currently available through Zoran Kovacevic’s web app.

I don’t think Google has anything to fear from GeoRSS, precisely because it is so simple and modest, aiming just to georeference web content. KML can do far more, but requires a 3D geobrowser. It would be great if future versions of Google Earth let you subscribe to GeoRSS feeds, just like the better HTML web browsers let you subscribe to RSS. As the competition among virtual globes heats up, this will no doubt become a common feature.

Blogging Microsoft Virtual Earth (aka “Live Local”) is not really part of the mandate of Ogle Earth as long as it remains a 2D mapping application, but some aspects of the version that went live last night have a bearing on Google Earth.

• First, the UK imagery: As Ed Parsons and other people have commented, it is superb, besting Google’s in those UK spots I’ve checked — if not in resolution, then in the quality and consistency of the post-processing. It will be interesting to compare future datasets if (okay, when) Microsoft releases its 3D virtual globe.
• The functionality of the scratchpad has improved dramatically. It took me no time at all to annotate a few places, even add an image, and share them publicly as a collection, like so. The scratchpad is nothing less than a geospatial version of Google’s Notebook, and it is so easy to use that my parents would have no trouble att all creating their own mashup and sending a link to friends.

  Google has several options available to it as it responds in this competitive space. It could make Notebook geospatially aware, so that you can annotate both URLs and physical spaces in Maps and Earth; it could also leverage Google Base, making it easy for users to save or publish geospatial database objects such as annotated placemarks or georeferenced photo collections from within Maps and Earth (including private collections); or it could repurpose Google Pages, perhaps in combination with Google Base, providing templates that make a user’s collected geospatial content easy to browse by others.

I think this is going to be an interesting summer:-)

Bentley, makers of the industrial-strength CAD and AEC authoring tool MicroStation, are having their user conference, and CAD Insider posts some notes from the event related to Google Earth. First off, CAD Insider has news of the latest MicroStation V8 XM release, which comes with a new feature that has proved popular with attendees:

Define an animation path for use in Google Earth. After a MicroStation model has been placed in Google Earth, a curve drawn is used by Google Earth to pan around the project

Elsewhere, CAD Insider has a Q&A involving Bentley representatives with a sense of humor (“What does XM short for?” “Nothing, it’s just a name.”) where they answer the “Why use Google Earth?” question.

What’s in store for the open-source NASA World Wind? The Earth is Square lists some projects people will be working on during Google’s Summer of Code:

• Shapefile improvements
• Student Teacher interaction system
• Correctly Handling Non-Ortho Images
• Support of Adding Imagery into World Wind
• Integrated Browser

Adding imagery and a browser involve World Wind catching up with Google Earth. The other three projects sound intriguing, though.

Very Spatial checks in on the state of spatial audio, linking to an Engadget post that in turn references a Sydney Morning Herald article on an Australian technology venture called Immersive Communications Environment (ICE). There is much speculation on how this will enhance gaming, but let’s not forget other potential uses: All this mapping and virtual globing is currently off limits to the visually impaired. Back in August last year, this blog speculated on whether spatialized sound might not be a way for the visually impaired to navigate a virtual globe. That possibility now seems closer than ever.

Google Earth was released almost a year ago, on June 28, 2005. One of the very first things I did with it was download Harry Love’s stages of the Tour de France, which ran from July 2 that year. Those files first made me aware of the possibilities for user-contributed mapping in Google Earth. I started this blog soon after.

Fast forward to June 2006. Harry has a new post up about Google Earth and the Tour de France, wherein he suggest plenty of new ways to get involved geospatially. (For starters, you can download the stages from Google Earth Community, courtesy of lucifer666.)

I’m glad that somebody’s finally located that giant disemboweled pink rabbit on an Italian hillside. Suddenly today, Google Earth Hacks has it, Virtual Globe Trotting has it, and Google Sightseeing has it. Not sure who was first, though, as attribution is scarce in the cut-throat world of Google Earth sightseeing:-) (Erm, picture on the left stolen from Virtual Globetrotting.)