Skip to main content

World Wind just so much hot air

Nasa's World Wind is a fat-client application that allows you to view the earth, moon, Mars, and Titan using satellite information to render "terrain in visually rich 3D, just as if you were really there." I downloaded the latest from the World Wind website (1.3.3.1) and installed it.

I installed the application while running on Windows XP SP2. It in turn installed 'managed' DirectX 9, which was basically DirectX 9c. After the installation was complete I had two icons on my desktop. One was for World Wind 1.3, and the other was for World Wind Moon 1.3. Which leads to a problem with the application (at least for me): it's written in C# and the version supplied by Nasa will only run on Windows. There is, however, activity afoot to port it to Mono on Linux.

I opened up both applications, first the moon, and then the earth. When both initially open they present a beautiful 3D view of the moon and the earth. And the interface is easy enough to learn so that I was both panning and zooming within five minutes of starting the applications. But I quickly learned that World Wind has poor resolution at high zoom levels and consumes 100% of the CPU at those high zoom levels.

Using the earth viewer as my prime example, I attempted to zoom into two areas on the earth that I'm somewhat familiar with: Orlando, Florida where I live, and New Orleans where an aunt and uncle of mine lived for nearly 20 years. In both cases World Wind could not resolve anything of significant detail at either location. Instead, I had to use Google Map to resolve details which World Wind could not.

First, we look at Orlando International Airport with World Wind.



Then we look at Orlando International Airport with Google Map.



Next, we look at New Orleans and the Louisiana Superdome with World Wind.



Then we compare that with Google Maps, this time looking at the images taken after Katrina.



As you can see from my screen shots the World Wind close-up resolution is horrible. I might concede that it's due to operator error, but even if I could correct the resolution, the system impact after zooming in close makes using World Wind pointless. When zoomed in to the levels shown in the screen shots, World Wind 1.3.3.1 was consuming 100% of the CPU. Google Maps with Firefox, by comparison, only spiked briefly to around 70% as map tiles were being downloaded and displayed on the map. Otherwise the Google Map/Firefox combination had no impact on the system at all.

Nasa's World Wind is, from my perspective, bloated, poorly designed and written. For maps and satellite imagery we're far better served by Google Maps.

Comments

  1. Sure, if you just look at flat places like those it is worthless. But have you taken a look at any mountains? I recommend the ones in Oregon and Washington for starters. At the moment World Wind is more about looking at the Earth and its macroscopic features than looking at cities. The elevation data is what makes it interesting and beats the heck out of Google's tools. Granted, it is more of a toy than a practical tool because of the resolution. Also the Blue Marble feature lets you see the Earth in its different seasons, and the contrasts are pretty cool.

    ReplyDelete

Post a Comment

All comments are checked. Comment SPAM will be blocked and deleted.

Popular posts from this blog

cat-in-a-box channels greta garbo

So I'm sitting at my computer, when I start to notice a racket in back. I ignore it for a while until I hear a load "thump!", as if something had been dropped on the floor, followed by a lot of loud rattling. I turn around and see Lucy in the box just having a grand old time, rolling around and rattling that box a good one. I grab the GX1 and snap a few shots before she notices me and the camera, then leaps out and back into her chair (which used to be my chair before she decided it was her chair).

Just like caring for Katie my black Lab taught me about dogs, caring for Lucy is teaching me about cats. She finds me fascinating, as I do her. And she expresses great affection and love toward me without coaxing. I try to return the affection and love, but she is a cat, and she takes a bat at me on occasion, although I think that's just her being playful. She always has her claws in when she does that.

She sits next to me during the evening in her chair while I sit in mi…

vm networking problem fixed

Over the weekend I upgraded to Windows 8.1, then discovered that networking for the virtual machines wouldn't work. Then I tried something incredibly simple and fixed the problem.

Checking the system I noticed that three VMware Windows services weren't running; VMnetDHCP, VMUSBArbService, and VMwareNatService. VMware Player allows you to install, remove, or fix an existing installation. I chose to try fixing the installation, and that fixed the problem. The services were re-installed/restarted, and the virtual machines had networking again.

Once network connectivity was established there was exactly one updated file for Ubuntu 13.10, a data file. This underscores how solid and finished the release was this time. Every other version of every other Linux installation I've ever dealt with has always been succeeded by boatloads of updates after the initial installation. But not this time.

Everything is working properly on my notebook. All's right with the world.

sony's pivotal mirrorless move

I'm a died-in-the-wool technologist, even when it comes to photography. I have always been fascinated with the technology that goes into manufacturing any camera, from the lenses (optics) through the mechanical construction, the electronics involved, and especially the chemistry of the film and the sophistication of the digital sensor. It's amazing that the camera can do all it's asked of it, regardless of manufacturer.

Of all the types of cameras that I've really taken an interest in, contemporary mirrorless (again, regardless of manufacturer) are the most interesting because of the challenging problems the scientists and engineers have had to solve in order to build a compact but highly functional camera. In particular I've followed the sensor advances over the years and watched image quality climb (especially with μ4:3rds) to exceed film and rival one another such that there's very little difference any more as you move from the smaller sensors such as 4:3r…