Identifying your travel photos when you return home - Part III

The Photo Identification series, discusses one of the most classic problems of the vacation photographer, identifying one's photographs after returning home. When people look at their photos weeks after making them, it can be difficult, if not impossible to remember where each one was made, and what each images' subject is.

In Part I, low-tech identification methods were discussed, such as written journals, marking maps with photo locations, and using identifier photographs. In Part II,  hi-tech identification methods which are automatic or close to it, such as using GPS technology was discussed.

In Part III, I conclude the series with a discussion of software to input missing GPS data, correct already embedded data, and locate GPS coordinates for input into image exif data, and using only manually collected information about one's photo locations.

Identifying your travel photos when you return home - Part I

It's the classic problem of the vacation traveler. After two weeks away, you begin to review your travel photos, a few days or weeks later, and you can't remember where you took many of them, and what the buildings and scenes in them are.

While traveling, you can ensure you will be able to identify your photographs through easy to use, inexpensive, low-tech techniques. While high-tech methods, can also help handle image identification, even these can sometimes get a needed boost from more down to earth methods.

High-tech identification methods, while great, can sometimes fail, so every photographer, even a casual vacation photographer, should be familiar with the low-tech, failsafe photo identification methods I discuss below. During my recent trip to the Baltic region of Europe, my GPS, attached to my DSLR, died in Stockholm. I reverted to the low-tech techniques, which worked beautifully for me.

Travel Photography: Geotagging, Part 2

In Travel Photography: Geotagging, Part 1, I discussed what geotagging was, and why anyone taking photographs while traveling should at least consider it its use. Here in Part 2, I discuss GPS receivers and geotagging software.

The Global Positioning System (GPS) is a global navigation satellite system developed by the United States Department of Defense, and maintained by the US Air Force. It uses 24 medium Earth orbit (12,500 miles above the earth) satellites, each transmitting precise microwave signals, which enable a person with a GPS receiver to determine their current location, the time, and their velocity.

The satellites circle the earth twice a day, but at any given time, it's rare to pick up even the half on any side of the earth. Fortunately, you only need 3 or 4 satellites to use a GPS receiver to navigate. The signals sent by GPS satellites are not able to reach deeply through solid objects, such as buildings, but the system works well outdoors.

Until 1983, the system was not available to the general public, but after Korean Air Lines Flight 007 was shot down that year, after straying into the USSR's prohibited airspace, President Ronald Reagan issued a directive making GPS freely available for civilian use. Since then, GPS has become a widely used aid to navigation worldwide, and a useful tool for map-making, surveying, commerce, and scientific uses, as well as geotagging.

I remember getting my first GPS receiver, plus software to turn my laptop into road navigation system, years ago. It was so much better than reading maps. It could pinpoint your position as you traveled. It's comforting to know exactly where you are, while driving in a new area. Now, when traveling, I use a portable GPS device to get around (OK, I admit I have some maps as backup, just in case.)

When I first began to experiment using GPS with my photography, there were few GPS receivers built specifically for use with Nikon or other GPS enabled DSLR cameras. The one standout at the time was from Red Hen, however, it cost more than $600. I decided to build my own. Like many, I based my system on the Garmin Geko 301 GPS receiver. I modified the Geko to mount on my camera, as well as the Nikon MC-35 GPS cable, and necessary PC serial cable. The unit worked like a charm with my Nikon D200, but was somewhat unwieldy due to the cabling requirements. Last year, I purchased the Solmeta DP-GPS N2 kit, which is small, and pulls in signals much better than my homemade setup.

Over time, GPS technology has dramatically improved. Receivers are now built with new chip sets which have more ability to receive and decode the L band microwave signals sent by the GPS satellites. When deciding which GPS receiver to purchase for your camera check for:

• Compatibility with your camera.
• Size and cable specifications to determine usability.
• If the unit must be attached to the hot shoe of your camera, or if it can be held on the strap, etc. to free the hot shoe for use with your flash.
• If the unit is plugged into a camera port which is used for other purposes, if a splitter is available for simultaneous use of the port with another device.
• If it has it's own power supply (preferable) or uses power supplied by the camera.
• If it has a built-in PNI Electronic Compass, as some cameras can record the direction the camera was pointed when the photograph was taken.
• If it has an auto indoor GPS position fixed mode, so that it will allow the camera to use the last GPS position received, to store with photos taken, while the camera is used inside.
  
• The sensitivity of the GPS unit to receive data, even in adverse conditions such as bad weather, among tall buildings in cities, and amid forested areas.

When I recently checked on Cnet's download.com for geotagging software, there were 10 choices, but I know there are many other products available. Quality geotagging software can actually write raw data into each photograph's Exif data, however, for me it's more important for it to be able to pull existing Exif data from my photos and use it. After reviewing geotagging software, I purchased RoboGeo. When choosing geotagging software check for:

• The software must be able to read your camera's Exif data directly, edit it, add new data to it, and use it for mapping purposes.
• In order to create export files, the software must be able to pull the data directly from photos from a list of your choosing.
  
• Is the software capable of stamping the photos themselves on their face, if desired, with time and GPS information?
• Can the software use Google Earth to directly geotag photos missing GPS information?
• Can the software geotag photos from place names, or IPTC locations?
• The software must be able to create Google Earth KML and KMZ files to create maps of your photos on Google Earth.
• The software must be capable of exporting geotagged photos to Google Maps, Flickr and Yahoo Maps, MapPoint, Shapefiles and create DXF files to be used in 3rd party utility programs.
• The software should be capable of use in GPS Visualizer, an excellent personal mapping web site.

Some photo sharing web sites like Smugmug.com are capable of making their own maps via your photographs, if they contain the correct Exif data in each photo. Here geotagging software comes in handy to edit GPS Exif data, or add data to photos with missing or incomplete GPS data. If you'd like to see what one of these wonderful maps looks like go to my photo-site NSL Photography. Navigate to the nslphotography > Cities > Philadelphia, Pennsylvania > Philadelphia Photo Walk - Society Hill / Olde City gallery. Opposite the gallery name, click on the "Map This" button. There are 39 photos which will map, so it might take a few moments. Click on one of the green balloons with a face, of a photo on the right, and see what happens.

The map sure answers the question, "Hey, exactly where is that?" doesn't it.

Travel Photography: Geotagging, Part 1

Have you ever wondered what all the geotagging fuss is about, or what it actually is? Have you ever heard the expression, "Find your photos," and wondered what the heck that was all about?

Have you ever returned home from a long vacation, and started scanning through your photos, only to forget which church was which, or exactly where you took that great photo? We all have, at one time or another.

Year's ago I took detailed notes whenever I took photos on trips. More recently, I dictated the information into a digital voice recorder.

Here's the thing though, I can go on a trip for a couple of weeks and easily take several thousand photos, especially if they're wildlife photos. Not that long ago, on a "trip of a lifetime" to the Galapagos, I took more than 5,000 photographs in just a week of hiking, cruising, and snorkeling.

The best solution in the 21st century, I've found to record exactly where each of my photos was taken, is geotagging.

"Geotagging is the process of adding geographical identification metadata to various media such as photographs, video, websites, or RSS feeds and is a form of geospatial metadata. This data usually consists of latitude and longitude coordinates, though it can also include altitude, bearing, accuracy data, and place names."

Geotagging photographs can be done manually or automatically. It can be accomplished via a GPS device, geocoding, geotagging, or Exif editing software. Some Point & Shoot camera manufacturers have added GPS modules directly into their cameras, while other cameras, especially professional quality DSLR's, are GPS capable and can have portable GPS devices plugged directly in to them.

Geotagging my photos has become a crucial step in documenting my journeys. It enables me to be able to precisely inform interested parties where the photograph was taken. By geotagging my photos I can easily use them to create a narrative of my travel experience.

Moreover, when I travel to places few have had the chance to visit, I can use the geotagged photos to help answer the question, "Hey, exactly where is that?" Using online mapping software like Google Maps or Goggle Earth, I can literally "map" my geotagged photos so everyone can can see the photo coupled with both topographical and geographical data displayed on the map.

My Nikon DSLR is GPS capable. It keeps GPS information in each photo's Exif data. I could enter the data manually, collected with one of those handheld GPS units, but that's just too much work, so I bought a GPS receiver for my DSLR. It's definitely the best travel photography accessory I bought last year!

I purchased the Solmeta DP-GPS N2 unit (from Nikonians) which plugs directly into my Nikon DSLR. Every time I take a photograph the camera pulls the GPS information from the Solmeta unit and stores it with the photo.

I use RoboGEO software which can read the GPS data (longitude, latitude, elevation) from each of my photos directly. I can then create a Google map which shows each of the chosen photo locations, or create a KML or KMZ file to import directly into Google Earth. Many photo display websites such as Google's Picasa, Yahoo's Flickr, or SmugMug can take your photos and map them for you in your photo area of their site, if the photos contain GPS data.

I highly recommend any traveler geotag their photos to enhance their memories of their sojourns.