All posts by Stefan Geens

Towards metadata for KML

<meta name=”description” content=”A long-form piece that tries to zoom out a bit for a better big picture. You will either know everything in it already, you won’t care, or it will be fundamentally flawed in some way. Please choose one.”>

It’s always fun to show off Google Earth to a first-time user while surreptitiously observing their reaction; it really is an impressive application. Don’t forget that all this immersive goodness is just a lure, however; it’s meant to draw us in until we find ourselves using its most innovative feature: The network link.

Continue reading Towards metadata for KML

ArcIMS to KML

Digital Earth Weblog gets to work on converting ESRI’s ArcXML into KML using XSL, so that ArcIMS servers can have Google Earth as a client.

Site visitor tracking via Google Earth

More innovative uses of KML in this Google Earth Community thread. “PasiH” has created a web application that provides visitor tracking via Google Earth and called it Mazurka, in honor of a Polish folk dance in triple time with a usually moderate tempo, containing a heavy accent on the third or second beat.

Ogle Earth has generously agreed to act as a Guinea Pig to test this.

Here is the KMZ network link that tracks Ogle Earth’s site visitors. Feel free to download and find yourself on the map. It’s refreshed every 10 minutes.

To roll your own, all you need to do is go to the Mazurka page and enter the URL of the site you want tracked. In return you get a network link and an HTML snippet. You put the HTML snippet into the site files you want tracked. The snippet requests an image from the Mazurka server whenever a visitor’s browser renders the HTML, which is how Mazurka knows what the visitor’s IP address is. This IP address is then converted to a real location, and that location is then provided as an entry in the KML that the network link periodically requests.

It’s a lot simpler than that description makes it sound, really. The one rough edge that I could see is that unkown IPs tend to be mapped to near Equatorial Guinea (but that could probably be solved by adding a line of code that filters out those entries). Also, I have no idea what else is being done with Ogle Earth’s visitor tracking data once Mazurka has it, but this blog has no secrets. (And no shame.)

(The tracker is valid for www.ogleearth.com URLs; I’m not sure if it tracks go.ogleearth.com hits.)

Sound content

In High Earth Orbit, a post pointing to a wonderful new mashup: Freesound, free geotagged (!) ambient sounds from around the world. With a network link to Google Earth from the get-go.

Now the race is on to find a place that’s in both Freesound and this QuickTime VR database for the complete immersive experience.

All this raises an interesting angle though. We sighted people get all impressed by the spinning globe on our screen, but what’s in it for the visually impaired? Not much, at the moment, but the same was the case for the internet circa 1995. Gradually, navigation techniques for the blind were developed for conventional websites, and there is no reason why spatial locations should be any harder to convert.

On the contrary, it might be much easier. If locations on Google Earth were to one day emit distinctive sounds from distinctive directions for a direction-aware headset, with loudness indicating distance, for example, and with position labels read out, Google Earth the browser is potentially a far more intuitive environment to navigate for information gathering than the old-skool website, because spatial awareness is something that is common to everyone — no sight needed.

CAD in Google Earth?

An intriguing idea: Robin Capper, a New Zealand CAD professional who blogs, sees a future where Google Earth becomes a common ground, so to speak, for architects and others who use computers to model buildings:

A BIM project that extended to a site, or maybe suburban layout, can now be placed in context. Anyone with a broadband net connection can have the world on their desktop today. Your project is part of that world.

He references this article in an online trade publication, but go via Robin, he has an interesting take on it.

(Acronym alert: BIM = Building Information Modeling; AEC = Architecture, Engineering & Construction, and CAD = Computer Aided Design.)

Aussie Nuke Tsar Goes Ballistic Over Google’s Earth

Sorry, I couldn’t help it, but some stories just demand the tabloid headline treatment.

More calmly now: Head of Australia’s nuclear energy agency Dr. Smith would like Google to censor the imagery in Google Earth of that country’s only nuclear reactor, a small research and medical reactor at Lucas Heights. Here is the full story.

What, this reactor here?

lucas.jpg

You see, according to Dr. Smith, “The question comes down to, if you put it on the internet, does it go to Pakistan or Afghanistan and make it easy for them?”

Ah, of course, them. How unfortunate, then, that the last person to try to blow up the reactor, in 2003, was French. Or the fact that anyone can fly over the reactor, walk up to the gate, or buy aerial shots from dozens of vendors. Or that you don’t need a detailed map of the reactor if you just want to fly a jet into it.

<rant>In this day and age, all nuclear reactors are unsafe from determined terrorists. Reactors are bombs waiting for fuses. It’s why I no longer support nuclear energy. Had any one of those jets on 9/11 flown into Three Mile Island instead of their intended target, much of the Eastern Seaboard would be unlivable today.</rant>

(Update 2005-08-08 10:16 UTC: Cooler heads prevail in Australia’s federal government.)

Geobloggers puts Virtual Earth to shame

The new Google Maps-based Geobloggers site is out. My God.

Maps bleeding to the edge? Check.

Floating draggable, resizable interactive windows? Check.

Its own API for hacking? Check.

Savable Searches? Check.

Dynamic drop-down menus? Check.

Translucent status messages? Check.

(And, er, works wonderfully with Safari once you click on the + in the Search Results? Check.)

All this seems to vindicate the Google Strategy that if you build the infrastructure, they will come and build the scratch pads for you.

And Google Earth support is now well ingrained. (Feature suggestion: In Map Tools, my favorite new feature is the ability to pick a country and then a city from a list to be whisked there automatically. That’s incredibly useful. I’d love it for there also to be a “Fly to Google” button there, as this kind of augmented browsing isn’t currently available in Google Earth.)

I’m stunned.