Now there’s a way to upload photos that are already labeled with their exact latitude and longitude using geotagging, the fancy name for labeling data with information on its geographic origin. Photos with “geotags” have coordinates embedded invisibly in them. Some programs or online photo services use these tags to generate maps showing just where each photo was taken, or to label or organize the images. Not long ago, this capability was mostly done through manual labeling or with costly equipment.

The $129 Eye-Fi Explore Card from Eye-Fi Inc. gives people the ability to wirelessly send geotagged photos from a digital camera.

This week, I tested the $129 Eye-Fi Explore Card (EyeFi.com), a special two-gigabyte memory card from Eye-Fi Inc. that adds a photo geotagging feature to Eye-Fi’s original functionality: the automatic wireless uploading of photos, straight from a digital camera to a home computer or photo-sharing service. If all goes well, users can capture and upload what are essentially geographically prelabeled batches of digital photos — with minimal effort and time.

But after days of testing, I found myself more frustrated as I used this wireless memory card in various places and situations, and found the tagging to be unreliable in one scenario. (Eye-Fi Inc. said my experiences weren’t typical.) At home in Washington, D.C., and while on a business trip to California, I tried it using a two-year-old Kodak digital camera and two different Vista laptops, though it also works on Macs.

Eye-Fi introduced the Explore Card as a follow-up to the company’s original wireless memory card, which it introduced last fall. Once set up, the first Eye-Fi card initiated the transferring of photos to a computer or Web site whenever the digital camera was turned on and as long as it was near a pre-associated wireless network.

Through a partnership with Skyhook Wireless, the Explore card can automatically label photos with their latitude and longitude using data from the Skyhook’s Wi-Fi positioning system. As long as a photo is captured within the Skyhook coverage area, which the company says covers 70% of North America, and the geotagging is enabled, each photo will be coded with data identifying where it was captured.

The Explore Card turned otherwise normal photo-sharing sites into mini maps showing where I had traveled while on a business trip in Silicon Valley. I set my account up to work with Flickr, Kodak Gallery, Snapfish, Shutterfly and Picasa Web Albums, though only one will work at a time. Flickr, Picasa Web Albums and Smugmug make use of geotagged photos by tagging shots with their location data, such as “Downtown Palo Alto, California.” I used Flickr and Picasa Web Albums to instantaneously generate a map showing where I was when I took photos.

On Flickr, each image was represented by a pink dot associated with one of several photos displayed in a horizontal bar below the map. This map can be searched for specific tags (photo labels) or locations and can be narrowed to show images from everyone who uses Flickr, just your own photostream, or only photos from friends or contacts. My searches returned results in seconds, finding shots that were geotagged with “Palo Alto” and tagged by me as containing flowers. I enjoyed looking at other Flickr users’ photos when I searched everyone’s images, specifically in cities where I recognized landmarks.

Picasa Web Albums showed each geotagged image on a map by placing tiny versions of each photo on the map. In certain cases, when I had multiple photos taken at the same spot, photos appeared with lines drawn from them to a spot, much like spokes of a wheel. I also looked at my Picasa photos on maps in Google Earth; a quick link to the program is conveniently found at the top of the Picasa Web Albums screen.

Another key feature of the Explore Card is its hotspot connectivity. The card is capable of working in any Wayport location, which includes McDonald’s (MCD) restaurants and certain airports and hotels. Though using Wayport locations normally requires sign-ins and/or payment via a computer screen, the Explore Card works as soon as the camera is turned on in these locations. This service is free for the first year, but after that, it costs $19 annually to continue.

Finally, the Explore Card notifies users via SMS or email messages when photos have either started or finished uploading; or if these uploads are interrupted, which happened to me a few times. This is useful in Wayport wireless zones, where the camera has no real way of signaling when an upload is finished or when a computer isn’t handy.

In a hotel with a flaky Wi-Fi network, the Explore Card was crippled, though I blame the hotel for this inconvenience. But even when I traveled to a local McDonald’s, where Eye-Fi’s maker has a deal for free Wi-Fi for its cards, the Eye-Fi stuttered and couldn’t consistently upload photos. When I plugged the card directly into my laptops, the results weren’t much better.

If you aren’t within Wi-Fi range while taking a photo, it won’t be geotagged. I ran into this issue in one instance: On California’s highway 101, I took a handful of photos, but when I checked my Eye-Fi account later, none of these photos was automatically geotagged.

Some people worry about privacy settings when it comes to uploading geotagged photos directly to a sharing Web site. Settings within the Eye-Fi Manager make it easy to adjust permissions to determine who can see your photos within each of about 25 sharing sites.

Users can opt to share photos only to a home computer through their own Wi-Fi network, and a special card is designed for just that: the $79 Eye-Fi Home. This is meant to serve as a shortcut for transfers.

The original Eye-Fi, which costs $99, was a useful tool as a wireless memory card, but I didn’t have as much luck with the more expensive Eye-Fi Explore. Still, when it did work, I found geotagging to be a great way of automatically labeling and organizing my photos. Instead of just being neatly stored in a folder on your computer, geotagged images are given a spark of life and relevancy when plotted out on a map.

Edited by Walter S. Mossberg

Email: mossbergsolution@wsj.com

On a chilly day, most folks find it tough to open the front door to retrieve the newspaper — much less climb a 15,000-foot mountain. But plenty of people court danger by rappelling down canyons and camping in remote woodlands. This week, I tested a device that will give thrill seekers a little extra insurance: It lets the folks back home track their progress, and learn when they’re OK or when they’re in trouble.

When activated, the $170 SPOT Satellite Messenger from SPOT Inc., the Milpitas, Calif., unit of Globalstar Inc., emits a signal to GPS satellites, which notify SPOT’s messaging service. The service then sends a message to friends, family or emergency rescue teams about your current status. Because it uses GPS technology, the SPOT will work even when you’re far from cellphone signal range and anywhere in the world.

I tested SPOT in my Washington, D.C., neighborhood (city parks still count as outdoorsy) and on a trip across the California desert and mountains on the way to a conference — though I was scaling mountains in an air-conditioned SUV rather than in a rock-climbing harness.

In my tests, SPOT worked without a problem. Notifications from the device were delivered to my friends via email and text message and included my current latitude and longitude. The service also sent along canned messages that I set up in advance on the company’s Web site at www.findmespot.com and hyperlinks to Google Maps that showed my location.

SPOT charges a $100 annual service fee, which includes an unlimited number of messages that can be sent out from your device using three buttons: OK/Check, Help and 911. An additional $50 per year tracking service called SPOTcasting follows and marks your exact location every 10 minutes for 24 hours each time it’s initiated.

This simple and straightforward device could really help in a dangerous situation. And the company takes its job seriously: A steely message on the SPOT packaging reads, “Opening this box is the first step in making sure you don’t come home in one.” But SPOT could also save the day in less-adventurous situations, such as when your car dies and you’re out of cellphone range.

However, SPOT isn’t perfect. While its three message-sending buttons make it easy to use, they also limit the types of messages it can send. There’s no keyboard, so messages must be brief and set up in advance on the Web site. And the device only sends messages and can’t receive them. Your friends and family have no way of getting back in touch with you on SPOT should you send a Help message from beyond cellphone range.

SPOT is a bright orange device with roughly the same surface measurement as a BlackBerry, though it’s considerably thicker. Its durable casing makes it waterproof and floatable, along with working in extremes like -40 degrees Fahrenheit and up to 21,000 feet above sea level. It runs on two AA lithium batteries, which last for different amounts of time according to the type of message being sent.

Setting up SPOT took only a few minutes on the Web site. A default or personalized message can be set up to go out with OK/Check and Help notifications, and email addresses and cellphone numbers (for SMS text messages) can be entered online as the destinations for these messages. Every message includes the user’s current location in terms of latitude and longitude, along with a hyperlink to access that location via Google Maps.

SPOT sends messages and location information via satellite, including points that can be tracked on a map.

The OK/Check button can be used most casually by owners of this gadget, as it merely serves to assure others that you’re fine. A good example might be two people on a three-month sailing trip who use this button as a means of checking in with family every Sunday night.

If OK/Check is held down for five seconds, it initiates the SPOTcasting tracking service (provided you’ve signed up for it) and locates your device every 10 minutes for a 24-hour period. These tracked points show up on SPOT’s Web site and are displayed as numbered points on Google Maps.

SPOT worked for me while driving through a regional park with a campsite, where cellphone range was faint, and up into boulder-crusted mountains. Just minutes after pressing Help or OK/Check or initiating tracking, friends received word of my location via emails and text messages.

You can’t set SPOT to track a trip for longer than 24 hours or at different intervals, such as every hour for a week. And the only way for others to view your tracked points is if they sign in using your online account’s username and password.

The Help button is used in more urgent situations and uses messages such as “Urgent help needed. Pick me up at campsite.” (The default for Help is “This is a HELP message. Please send for help ASAP.”) But preset messages shouldn’t be made too specific during the online setup because they can’t be changed from the device later.

The 911 and Help automatic notifications will always override less urgent messages like OK/Check or SPOTcasting. In the case of the 911 and Help buttons, one can be pressed after the other and the messages for both will still go out at the same time. The 911 button will send a message every five minutes until power runs out (the company says this will last for up to seven days) or until the message is canceled; Help sends a message every five minutes for an hour or until canceled.

The 911 button is more serious. When pressed, SPOT Inc. automatically notifies a certified 911 company called the GEOS International Emergency Response Center, which contacts your specified emergency contacts first to see if they know anything about your situation before dispatching a rescue squad using your coordinates.

If you can adjust to SPOT’s three-button approach, the device could be helpful for you or someone you know during outdoor adventures. Many people will buy SPOT simply for its 911 button, as an insurance policy on fluky cellphone service.

• Email mossbergsolution@wsj.com

Corrections & Amplifications:

The SPOT Satellite Messenger uses a global positioning system to determine a user’s location and a second satellite network to send notifications to friends, family and emergency services. This column erroneously stated that GPS satellites send notifications.