Underexposed

Nikon's GP-1, a GPS tracking device that fits into the company's cameras and writes location data into image files, is starting to go on sale for a price of about $210.

The Nikon GP-1 lets people record location data directly in their photos.

(Credit: Nikon USA)

Nikon announced the GP-1 in August along with the D90 SLR, saying it would arrive in November, but didn't give a price at the time. Now it's on sale: J&R.com lists it for $209.99 and Adorama for $209.95.

Don't expect to get one immediately, though. Adorama lists it as out of stock, though it lets you order it. J&R just describes it as "coming soon."

Although it costs more than many handheld GPS units that offer maps, waypoints, and other navigation features, the GP-1 is specialized for photography. It plugs into a Nikon SLR's flash hot shoe and adds latitude and longitude data to photos as they're taken, a process called geotagging.

Although geotagging is only a niche technology today, it holds some promise for photographers. For one thing, geotagged photos can be located on a map, helping people remember where they took a particular shot or find out what a certain region looks like by browsing with a map. For another, it can help people organize photos by searching for a place name on their computer or a Web site hosting their photos. But geotagging can be a hassle.

The GP-1 and similar devices mean geotagging gets a lot easier: there's no need to download track logs to your computer, make sure your camera's clock is synchronized with the GPS clock, run software to write the location data into files, or worry that doing so will cause problems with the image file itself.

The GP-1 is compatible with Nikon's D90, D200, D300, D3, and D3X cameras, Nikon said. It comes with two cables, one for a dedicated port on the D90 and another for the other Nikon cameras that use a Nikon 10-pin connector.

Nikon has been bitten by the geotagging bug. Its compact Coolpix P6000 has built-in GPS technology, too.

IM2GPS compares a sample photo (top left) to geotagged Flickr photos to find other similar shots (top right) to guess where the sample was taken.

(Credit: Carnegie Mellon University)

Thousands of others have taken the trouble to geotag their photos, so why should you have to jump through a lot of technical hoops to add location data to your pictures?

That's the upshot of a technique devised by Carnegie Mellon researchers and announced Wednesday. The technique, called IM2GPS, compares a single photo to the millions already on Flickr that already have latitude and longitude coordinates.

The algorithm looks at a photo's properties, such as textures, color distribution, and line patterns, then looks for matches at Flickr.

"We're not asking the computer to tell us what is depicted in the photo but to find other photos that look like it," said Alexei A. Efros, assistant professor of computer science and robotics, in a statement.

Efros also has been involved in photo research such as the scene completion technology that can patch over unsightly elements in a photo by drawing from similar ones stored at Flickr.

The researchers found they could locate sample photos within 200 kilometers for 16 percent of their test photos, which may not sound terribly useful, but it is 30 percent better than chance would predict, the university said. And that could still be useful for tasks such as forensic crime research or for guiding other image-processing tasks--for example identifying a taxi in Japan.

It worked more specifically at times, for example matching Paris' Notre Dame cathedral well, but the algorithm found Sydney's Opera House similar to a hotel in Mississippi and to a bridge in London.

Geotagging today is a complex task that typically requires a user to run specialized software that pulls location data from a GPS device's track log, then adds it to photos depending on the time each was taken. Geotagging isn't for the faint of heart today, though higher-end cameras from Canon and Nikon make it easier with the ability to plug a GPS directly into the camera, and camera makers have begun building GPS into some models.

Geotagging may seem abstruse, but it has potential advantages. You could find out just where that photo of the nice church in Ireland was taken even long after your vacation itinerary has faded from memory, for example.

Or with technology that converts geographic coordinates into actual place names, you could find your own photos or others' shots with ordinary search terms. For that latter challenge, Flickr is working to try to make it easier for users to identify in works the locations of their geotagged photos.

BURLINGAME, Calif.--Think of it as crowdsourced cartography.

In about three weeks, Yahoo plans to launch a project called Corrections in which users of the Flickr photo-sharing site can help with a thorny computing problem: providing the name of the place where a photo was taken.

Flickr's geo expert, Dan Catt, speaks at Where 2.0.

(Credit: Stephen Shankland/CNET News.com)

Flickr has 68 million photos that have been "geotagged" with latitude and longitude coordinates, said Dan Catt, who works on geographic work at Flickr, in a speech at the Where 2.0 conference here. Coordinates are fine for computers, but human beings looking at a Web site generally prefer place names to numbers.

The trouble for Flickr is that it's difficult to actually retrieve a place name for a given set of coordinates, a task called reverse geocoding. One problem, for example, is that not everyone agrees where one neighborhood ends and another begins.

With the new feature, Flickr will offer its best assessment of where a photo was taken, then let users fix it, Catt said. The site will start with offering information at the neighborhood level, but if a user doesn't agree, it will gradually step back to larger-scale regions.

"If you're not happy with what we're saying, tell us, and we'll learn from that," Catt said in an interview after his talk.

The service will remember a user's settings, so a given location that's one person's Lower Haight San Francisco neighborhood could be another's Upper Haight. As more people weigh in with what the name for a given location actually is, Yahoo will update its boundaries, Catt said.

Initially, Flickr will offer its own alternatives for a given area, but later, people will be able to type in the location, Catt added.

Most of the time the service should work fine, but geography can elicit passionate responses. "This will ruffle a lot of people's feathers," he predicted.

Microsoft likes digital photography enthusiasts as customers, and on Thursday plans to release a free new utility designed to keep them wedded to Windows.

Pro Photo Tools is geared for photography professionals and enthusiasts, and its first notable feature is the ability to geotag photos, or add geographic information showing where the picture was taken. Geotagging is an onerous chore with today's technology, but camera makers are working to build it into cameras, and it can pay off down the road.

Microsoft's Pro Photo Tools lets photographers geotag their photos and show where they are on a map.

(Credit: Stephen Shankland/CNET Networks)

That's because geotagging, done well, enables people to find photos by searching for the word "Paris" rather than sifting through folders with obscure filenames like IMG_5829.jpg or squinting at hundreds of image thumbnails. Until the still-distant day when computers can recognize your Aunt Polly or the Grand Canyon, geotagging holds potential as a way for people to get a handle on ever-growing digital photo collections.

"People are doing a lot more geotagging, but it's still somewhat cumbersome," said Josh Weisberg, Microsoft's director of digital imaging evangelism. "We want to make it mainstream."

Geotagging is just the opening salvo, though. Pro Photo Tools can be extended with new features; Microsoft is working on some and is considering whether to allow other companies also join in, Weisberg said.

"We've talked about making it extensible to third parties, but...It's a big question. I haven't decided yet whether we're going to do it," Weisberg said.

Looking at the digital photography software market, it's easy to imagine Adobe Systems is a competitor. But it looks to me like this is actually positioned more against Apple whose computers are popular among "creative professionals" and come with iPhoto editing software.

Weisberg shied away from competitive analysis, but agreed that Pro Photo Tools is designed to help make Windows more compelling. "It's focused on making the platform better for photographers," Weisberg said.

He also views Pro Photo Tools as a strong statement about what Microsoft can accomplish by building off its existing Windows infrastructure. "One hundred days ago, I wrote a memo," launching the project. "One hundred days later, we have a product. That's not typical Microsoft."

Pro Photo Tools' origin
The software is an outgrowth of the Microsoft Photo Info software the company released in 2007 to help photographers label some images with metadata such as copyright notices, captions, and titles, but it's expanded considerably.

The software can process data from a handheld GPS unit that shows where a photographer roamed, adding the latitude and longitude data to photos depending on when they were taken. That's how existing geotagging software typically works, but Pro Photo Tools has some more distinguishing features, too.

For one thing, it also lets photographers assign locations to photos by placing pushpins on an online map. For another, it adds rough geographic coordinates based just on a region name, such as "Boston." It can work with many of the proprietary "raw" image formats that higher-end digital cameras produce. And perhaps most significant, it uses Microsoft's Windows Live Local interface to add text fields such as region, city, and street to the photo.

I tried a pre-production version of the software and found it rough around the edges but a refreshingly thorough attempt to tackle the geotagging challenge.

One of my favorite features is a slider that let me correct for discrepancies between the camera time and my GPS unit's time.

Pro Photo Tools has a slider that lets people correct mismatches between the time recorded by a camera and GPS unit. Thumbnails of images pop up that can be matched with actual locations.

(Credit: Microsoft)

I had some problems on Windows XP with the software showing being unable to show larger versions of the photos and some other problems writing geodata to Canon's CR2 raw files. Weisberg said both problems have been fixed, and it worked fine with Nikon's NEF format.

To run the software on Windows XP, users must have installed the Windows Imaging Component, the image-handling engine built for Vista but also available for Windows XP. WIC is likely to become more mainstream soon on XP: it's built into Service Pack 3.

One nice feature of WIC is that raw-image processing engines called codecs can be plugged in. Unlike Adobe and Apple, Microsoft relies on camera makers to supply the codecs for their formats. That means the company is wedded to them for support, but the major manufacturers all have released codecs, and relying on the manufacturer means Microsoft doesn't have to worry as much that writing data to raw files will corrupt them.

One annoyance for me was the lack of a free codec to handle Adobe's Digital Negative (DNG) format. A company called ArdFry Imaging offers one for $29.95, but that seemed like a lot to pay for a plug-in for a free tool.

Happily, Adobe plans to fill in the DNG codec gap.

"We'll be releasing a DNG codec shortly," said Lightroom leader Tom Hogarty in an e-mail. That will help out other Microsoft software such as Windows Photo Gallery that uses WIC to show image thumbnails and print photos.

One shortcoming, though, comes with Sony's codec, which doesn't let people write metadata such as keywords or geotags to its raw files.

Pro Photo Tools' future
Weisberg wouldn't detail much about what new modules are next for Pro Photo Tools beyond a few smaller features such as batch renaming to let photographers rename photos in bulk or a "painter" tool to let location tags or other metadata quickly be copied from one image and pasted to another.

But new features are en route. Microsoft plans another announcement at the Photokina show in September in Germany.

Microsoft wants Pro Photo Tools to be a work in progress--a frequently updated utility that evolves rapidly. "It's the evolving software model," Weisberg said.

What does the software portend for its overall digital imaging strategy? Weisberg is cagey, and given that Microsoft axed its Digital Image Suite product a year after it acquired iView Multimedia and its software to manage digital photos and other digital files, reading the tea leaves can be difficult.

Microsoft doesn't see Pro Photo Tools as competing either with the Expression Media product from iView Multimedia or with Microsoft's basic browsing and editing software, the Windows Photo Gallery package built into Vista or its more elaborate alternative, Windows Live Photo Gallery.

"Photo Gallery is focused on the consumer experience. We're looking at things more interesting to prosumers that would be complementary to Photo Gallery," Weisberg said. "We're also looking at Expression Media on the high end and walking a fine line between the two.

Geotagging, in which digital photos are labeled with the location where they were taken, is mostly unfamiliar to photographers today. But new developments are likely going to put the technology on the map.

In interviews at the Photo Marketing Association trade show in Las Vegas recently, several camera executives expressed an interest in geotagging and some companies were demonstrating technology. It's clear that mainstream geotagging is a matter of when, not if.

GE's E1050 is scheduled to ship in September with a built-in GPS receiver, though a PC will be required to make use of the location data.

(Credit: General Electric)

The strongest evidence I encountered is Air Semiconductor, a start-up building a chip designed to let cameras process GPS (Global Positioning System) satellite signals so latitude and longitude data can be attached to digital photos. It remains to be seen how well this works, but this idea is the holy grail of geotagging--no extra hardware or software is required.

Samples of Air Semiconductor's first chip, the Airwave-1, are due to start shipping this summer, with production versions going on sale at the end of this year or early next, said Chief Executive Stephen Graham.

"I think PMA next year is going to be when a number of companies unveil cameras with geotagging built in," said Graham, who flew in from the company's Swindon, U.K., headquarters to meet with camera companies at the photo show.

One can expect Graham to be bullish on his market, but there's independent evidence, too. General Imaging, the licensee of General Electric's new camera product line, plans to begin selling a camera this fall that takes a significant step, if not the full plunge, toward GPS integration. And market analysis firm IMS Research expects about 40 million GPS-enabled digital cameras to ship in 2011, more than a fifth of the total.

"Camera manufacturers need to differentiate in an increasingly competitive market," IMS Research analyst Matia Grossi said in a November report.

Why geotag?
Geotagging offers a new twist on digital photography, but it's got more promise than practicality today.

By adding location data into pictures, photographers will be able to search through photo archives on their computers based on where they took their pictures, not just when.

And geotags provide an easy way to figure out where a particular photo was taken, which could be useful when trying to identify something like a cathedral long after your memory of your trip to Europe two summers ago has receded into a blur. Today, software such as Apple's Mac OS X and Adobe Systems' Photoshop Lightroom can show a map when the user wants to see a photo's location.

Geotagging will be built into cameras, said Steve Haber, senior vice president of Sony Electronics' digital imaging and audio division. "It has to be," he said. "We keep hearing, 'My PC is this black hole for my photos'...People (need) as much metadata on their pictures as possible--date, location, event--which allows for easier search and for eliminating the black hole."

"There's no doubt we'll see cameras with built-in GPS within the next two years, possibly sooner," said Chuck Westfall, technical adviser for the professional products marketing division at Canon, the world's largest camera maker. "The desirability of that feature is quite clear."

The technology that's appearing extends well beyond the home PC. Photographers can share and view geotagged photos at Web sites such as Google's Picasa and Yahoo's Flickr.

Why not geotag?
Today, though, geotagging involves work beyond just taking the photos. A geotagger typically carries a separate GPS navigation device, transferring its location data to a computer along with the camera's photos and using special-purpose software to marry the information.

The process takes a lot of time, USB cables, and forethought.

Why not just build a GPS receiver into the camera? Mainly because new hardware makes cameras bulkier and more expensive, and GPS receivers draw significant battery power.

"At this time we feel there are too many glitchy things--dropouts of communication with the satellites, power consumption," said Richard Pelkowski, digital SLR (single-lens reflex) product manager for Olympus America. "We just have to overcome some limitations."

Nikon and Canon have taken baby steps toward tighter integration. High-end Nikon SLRs such as the D300 and D3 have a port that lets a GPS unit be attached directly, communicating with the camera so the location information can be recorded. A wireless transmitter can augment Canon's higher-end SLRs, including the 40D and 1D Mark III, to provide a GPS port, too.

General Electric's 10-megapixel E1050, which licensee General Imaging discussed at PMA, is a bigger step.

The company's current plans are to sell two versions of the E1050, a $249 model in May and another with a built-in GPS receiver by about September that's expected to cost about $50 to $75 more, a GE representative said.

However, the E1050 can't actually geotag by itself. When a person takes a picture, the receiver briefly powers up and records a brief signal from the GPS satellites. Later, software on a computer processes the data, in part based on GPS satellite data retrieved from a server over the Internet, and tags the photos.

That process is the very one used by Geotate, an NXP Software spinoff that showed off its geotagging technology at PMA. At the show, Geotate product manager Paul Gough specifically pointed me toward the GE cameras, saying, "We'll see our technology--we're hoping before the end of this year." GE, though, declined to confirm the partnership and said it's conceivable GE might eventually use a different supplier's technology.

Air apparent
Air Semiconductor has its own way of working around GPS limitations.

First, the Airwave-1 chip is designed to consume very little power most of the time. As with regular GPS receivers, it takes awhile to find itself--the unpleasant half-minute minimum wait called time to first fix. But then, it goes into a low-power mode, even when the camera is off, that keeps track of its position with a very rough accuracy of about 100 meters, Graham said.

Then, when a person takes a picture, the chip goes into a higher-power mode for substantially less than a second to capture more precise data. The rough location data already present essentially gives the chip a running start on figuring out its location, sidestepping the time-to-first-fix wait, Graham said.

"The power consumption we're taking is completely negligible compared to the power consumption of the (camera) system," he said. The chip consumes 1 milliamp of current when in its low-power mode, compared with about 30 to 100 milliamps for handheld GPS chips and 400 to 500 milliamps for a camera overall.

Graham wouldn't divulge the Airwave-1's power consumption during peak activity, but said it would consume less than one-tenth--and probably less than 100th--of the camera's battery capacity even with heavy use.

The chip isn't designed to work in weak-signal areas such as indoors, a task that consumes a lot of power. Instead, when the satellite signal is lost, the chip tells the camera the last known position.

Graham was previously marketing manager for Renesas' radio-frequency products group, and the other Air Semiconductor co-founder, Chief Technology Officer David Tester, was GPS group leader for Conexant. The 12-employee start-up uses Taiwan Semiconductor Manufacturing Co. to build its chips.

LAS VEGAS--A company called Geotate hopes to use an Internet service to lower a significant barrier to the technologically challenging practice of geotagging.

Geotagging, which uses a global positioning system to attach location data to photos to build in more descriptive data, is at present a difficult and largely manual process appealing mostly to serious photo enthusiasts. That's largely because it's too hard right now to build GPS directly into a camera for automated geotagging, so photographers must carry a separate GPS device and then marry the location data to the photos after the fact.

But Geotate, which NXP Software is in the process of spinning off, thinks it has an answer to some of the GPS integration difficulties for camera makers. Here's how it works, according to product manager Paul Gough, who described the technique Wednesday at the Photo Marketing Association trade show here.

First, a camera has to include a built-in GPS radio or have one attached externally to its flash hot-shoe. When a photo is taken, the camera or an external device records about 2 milliseconds' worth of GPS signal data.

That's not enough for the camera to get a location fix; one of the big problems of geotagging is that GPS receivers often take 30 seconds to get their first fix. Geotate's method, though, relies on a central server that later can figure out the location information from just that brief record of GPS data by comparing it to its detailed records of GPS satellite positions.

Geotate today has Windows software that handles communication with its server, and that software then embeds the location data in JPEG images. (It doesn't support raw images or Mac OS X at this point.)

Eventually, Gough said, he hopes camera makers will license the technology to build their own interfaces. Geotate plans to license an API (application programming interface) that could give camera customers access to the service for a particular camera or for a subscription, he said.

Geotate also announced a partnership Wednesday with a New Zealand company, Rakon Limited, to integrate its software with Rakon's GPS radio hardware. The radio measures 1/4 inch by 1/5 inch.

The ATP GPS Photo Finder is designed to ease the geotagging chore.

(Credit: ATP Electronics)

ATP Electronics has announced a device called the GPS Photo Finder that's designed to take some of the trouble out of geotagging your photos.

The device, like many GPS receivers, keeps track of its location based on signals from satellites. What's different is that instead of marrying that location data with your photos on a computer using special software, the Photo Finder has an SD card slot and handles the tagging by itself, the company said. When you copy photos to your computer, the location data is embedded in the JPEG files.

The device should go on sale for $99 in the next couple weeks, said marketing manager Jeffray Hsieh. It also includes a USB port that lets you plug in a flash card reader if your camera uses CompactFlash memory cards or some other format. It's based on the highly regarded SiRF Star III GPS chip.

Sadly, the device supports only JPEG files at this stage. Most photographers shoot only JPEG--indeed, most cameras have no other option--but higher-end models such as SLRs also support raw files, which record the image sensor data with no in-camera processing. And the kind of enthusiasts who shoot raw sometimes are the kinds of enthusiasts who like to geotag photos.

"We'll definitely continue to develop additional support for raw formats," Hsieh said, "but because of the fragmentation between camera manufacturers, it will be a challenge."

The company also plans on adding the ability to export track logs as a KML route file, a record of a person's trip that can be imported into Google Earth software. The company also is planning on adding altitude and direction data that some GPS devices can supply.

The Photo Finder also includes a screen that's can display the time, a feature designed to help nip geotagging time zone complications in the bud.

Personally, I geotag photos for personal archival reasons: which church/mountain/beach was that photo? Various Web sites also can take advantage geotagged photos.

• Nikon still leads Canon for SLR market in Japan - It's not the whole world, but Japan is a very important market. Pentax is a distant third.
• Novel GPS widget geotags photos on your flash card - This is a great idea: you insert your camera's flash card into this GPS device and it handles the geotagging from there. A much simpler work flow. But does it work with raw formats?
• Wacky Microsoft Popfly live-action demo - Putting something of a human face on an obscure coding exercise.
• Dan Heller's Photography Business Blog: Gaming the Creative Commons for Profit - Upshot of a three-part series: "The Creative Commons just doesn't fit in the photo world...no teeth for well-intentioned photographers...sharp and dangerous teeth for those who want to abuse the system and entrap anyone into paying big settlements."
• Ubuntu Hardy Heron Alpha 3 | Ubuntu - Details of Alpha 3 of Ubuntu's Hardy Heron release, due to ship in final form in April 2008.
• Flickr: The Photophlow emotes pool - For setting graphical emotes during Photophlow chats
• Flickr Set Manager - A tool to automatically create sets based on parameters such as tags.
• Economist uses CC-licensed photos on its Web site - This blog quotes a photog unhappy to find the Economist used his Creative Commons-licensed photo on its Web site. Sure sounds like commercial use to me, which the photog had precluded.
• 30-minute Olympus E-3 Promotional Video - A loooong Olympus promotional video with detailed descriptions of the E-3's abilities. Some nice illustrations of why a swiveling LCD is useful. Painful background music.
• Penguinistas hack Android onto real hardware | LinuxDevices.com - Programmers get Android working on Sharp Zaurus and various other devices.

Readers of this blog will have inferred I'm a fan of geotagging--in fact, I'm trying to label all my photos with the tags that show where the picture was taken, even though the geotagging process is complicated.

I'm betting that much of the value of geotagging lies in the future, for example, when I might have a harder time remembering which hike a particular picture came from. But can anything useful be done with those geotagged photos today?

Based on my scrutiny of a handful of sites--Google's Picasa, Yahoo's Flickr, SmugMug (the only fee-required site), Locr, and Everytrail--the answer is yes.

Google's Picasa site can show a map sprinkled with thumbnails of a photo album's pictures.

(Credit: Stephen Shankland/CNET Networks)

But as with other aspects of geotagging, today's cartographically clever Web sites are likely to appeal chiefly to enthusiasts who have some patience and technical abilities. Just like we're not at the stage where most cameras can add a location stamp as easily as they can add a timestamp, we're not yet at the stage where most folks are going to start with an online map when they want to share their photos or reminisce.

Collectively, the sites I checked show the potential of geotagging--but also the rough spots. My top pick is Flickr, with Picasa and SmugMug tied for second place. But each site has different strengths and weaknesses, so look carefully before you make any commitments.

One of the main reasons I picked Flickr as tops is because the Flickr maps interface can sift data better. For example, you can see a high-level view of all your geotagged photos, and you can filter that view with parameters such as your photos, your friends' or contacts' photos, anyone's photos, and most important in my opinion, specific tags. That's a handy interface when trying to find photos of, say, Yosemite National Park, but you can't remember which of several trips a particular photo is associated with.

Flickr displays pictures as unevocative pink dots, but the photos themselves are shown on a strip below.

(Credit: Stephen Shankland/CNET Networks)

In contrast, Picasa and SmugMug draw maps that only reflect the contents of a particular group of photos--called galleries at SmugMug, albums at Picasa, and sets at Flickr. (Google Maps can show Picasa images of a particular area to Google account holders who install a Mapplet application, though.)

Flickr also lets you take a set-based view of a map, with a scattering of pink dots representing your pictures. Indeed, it's probably the most likely way somebody might want to use a map to show off pictures of a recent trip, for example.

SmugMug, though, has what I found to be the slickest geotagging feature out there: fly-through slideshows of a gallery. With this ability, the site automatically shows a gallery's sequence of photos, displaying thumbnails along the way on a map and a red line connecting them.

It's a bit rough around the edges--I'm guessing because the technical difficulties of combining external Google Maps data with its own thumbnails--so it can be herky-jerky at times and with missing map elements. And for slideshows, thumbnails are hardly the best way to showcase sweeping vistas. But there's no question in my mind that the feature imparts a sense of traveling through a place, a sensation that regular slideshows completely lack.

Where Picasa has the edge over Flickr and SmugMug is in showing thumbnails of each image on the map, not just a dot or pushpin, which I like better even though thumbnails can get pretty crowded. It also shows larger pop-up versions than Flickr does. And for people who are geotagging their photos through the Web site, I think Picasa's interface is the best.

I also like the way Picasa, on an individual photo's page, includes a map showing where it was taken. But in part that's because there's a big panel of verbiage to the right of the screen on which that kind of real estate is available. A more photo-oriented site might not have that space to spare.

SmugMug lets you tour a gallery of photos on a map--a cool if still rough-around-the-edges feature.

(Credit: Stephen Shankland/CNET Networks)

Another major advantage of Flickr is its handling of location privacy--geoprivacy in Flickr parlance. Naturally you might not want to share with the world the location of your living room, and your pernickety aunt might be even touchier. Flickr co-founder Stewart Butterfield prohibited geotagging of images of a party at his house.

Happily, Flickr lets you set the geoprivacy of each image, though doing so is awkward. I'm glad the Organizr lets me change this setting, but why isn't there a geoprivacy option in a photo's privacy settings window or in the map that's shown when you click the photo?

There are some other options out there that deserve a look. Google's Panoramio has a reasonable approach to virtual tourism if not necessarily the best interface for storing your photos--it seems like a ripe candidate for some integration with Picasa.

Loc.alize.us likewise is an entertaining way to browse geotagged photos; it's a glitzy interface built on top of Flickr photos and Google Maps.

Like Panoramio, Locr, a German company, lets you upload your own photos. Like SmugMug, it's got a slideshow ability, though its photos are large and its map, a strip on the left edge with pushpin locations, is more an afterthought. That makes for a nicer slideshow than SmugMug's thumbnails, but there's not too much of a sense of place to it. And I can't help thinking when I see sites like Locr, though, that it must be tough building a critical mass of members when there are bigger photo-sharing sites already with major momentum.

For a journey-oriented site Everytrail lets people upload whole GPS track logs and label them with points of interest and photos. It's also got a handy feature that can show others' Panoramio pictures. It's a good way to look at trips people have taken in a particular area.

Locr shows individual photos fine, but doesn't handle groups with much aplomb.

(Credit: Stephen Shankland/CNET Networks)

I found Everytrail's interface a bit difficult and unintuitive at times, but it does have the advantage of being able to piggyback on Flickr: I successfully imported my bike trip Flickr set into an Everytrail map--though the klunkiness of the process was evident by the fact that I have three copies of each photo, and I can't figure out how to get rid of the duplicates. Also, when I inadvertently uploaded the wrong day's track log for a batch of photos, I had a hard time figuring out my error.

In the months that I've been trying this out, though, geotagging has been improving. I'm certain that these sites will improve as geotagging photos in the first place gets easier, more people try it, and programmers hammer away at the computational and user-interface challenges.

Another area with potential is software to deal with geotagging on computers. Mostly that's limited today just to utilities to marry geographic data with image files. But the rudimentary geotagging support in Adobe Systems' Lightroom and Apple's Mac OS X 10.5, which both can show a photo's location on a map, is a harbinger of things to come. Better geotagging abilities on people's computers will fuel improvements on the Web and vice-versa