Geotagging photos for Flickr with Mac OS X and a Garmin GPS

Ichetucknee River tubingMy photos from my bike club group ride and Ichetucknee River tubing adventure over the weekend were my first successful integration of photography, my recently-acquired GPS unit, and my quest for adventure.

Here’s the toolkit:

Here’s the procedure:

  • Synchronize your camera’s time with the GPS unit’s time.
  • Take your powered-on GPS unit with you on an adventure. Garmin makes a nice handlebar mount for mine. I also have a boat mount that I plan to put in the kayak. For the tubing, I put it in my dry bag that I took along.
  • When you get home, download the photos from the camera to your Mac.
  • Using RoadTrip, download your GPS track to your computer and edit the track as necessary. I copy my edited track to its own folder in RoadTrip. Export the folder from RoadTrip, creating a GPX file.
  • Open GPSPhotoLinker and load the track and the photos. Use the “View on map” button to preview the position online in Google Maps (the default, others are available). I mostly found myself using the “Time weighted average point.” When you are satisfied with how things are looking, use the “Save to photo” button to write the geographic info into the metadata of the photo file. A batch mode is also available.
  • Before uploading to Flickr, You need to set the Import EXIF location data setting in your profile to “Yes.” I don’t know why Flickr doesn’t have a “This photo contains geographic data, do you want to use it?” option when you click, “Add to your map,” but for now, it will only automatically use the data on upload.
  • Upload your images to Flickr. If you are editing the images first, make sure you don’t save them with a method that discards the metadata.
  • Sit back and enjoy your mapped photos. Here are mine.

A tale of two lenses

It was a good weekend for butterflies in the garden. On summer weekends around the house, I usually keep my Canon Digital Rebel D-SLR by the front door (and therefore near the butterfly garden) with the Canon 75-300 zoom lens on it ready to go should my visual motion detector go off as I gaze out the windows facing the garden.

I had a visit Saturday morning from one of my favorites, the black form of the Eastern Tiger Swallowtail butterfly. I took a bunch of pictures and was very disappointed when I downloaded them. Maybe I was particularly shaky for some reason. I thought the light was sufficient.

Later in the afternoon, the black butterfly was still hanging around and had been joined by its more typically marked cousin, shown here. It was clouding up for an afternoon thunderstorm making it less bright than earlier and I thought that was trouble if I went out there with the big zoom. So I grabbed my fastest (and lightest) lens, the 50mm f1.8, put it on the camera, and went out and got some great results. I probably could have cranked up the ISO, but I didn’t want to deal with the noise.

I was worried about getting close enough to the butterflies with such a short lens, but I was inspired by having seen David Pogue’s funny video demonstration of how to zoom the fixed-focal-length Sigma DP-1 and no doubt also thought of Derrick Story‘s frequent admonitions to “get closer” and got as close as I could. I am pleased.

Another option would have been to grab the 17-85mm IS zoom, but it’s heavy (the 50mm is light as a feather) and not any faster than the big zoom.

One of the problems I have with shooting the 75-300mm zoom for butterflies is that you can only get as close as about 5 ft. with it. (Why do I always think 7 ft. while shooting?) I often don’t think that’s close enough. The 50mm and the 17-85mm zoom both get you within 18 inches.

I hadn’t yet listened to Derrick’s podcast show from last week about how sweet good glass is. That reinforced the decision I am mulling about getting the Canon 70-200mm f4 L zoom lens to go with the Canon EOS 40D I am thinking of upgrading to from the Digital Rebel. Derrick might say that I just ought to go ahead and buy the lens, based on what he said on the podcast. (I looked and it gets you as close as 4 ft.)

Ironically, the 50mm/f1.8 is also the cheapest lens in my bag.

This year’s most common butterfly sighting

Zebra Longwing on Orange Cestrum

The Zebra Longwing (Heliconius charitionius) is the state butterfly of Florida. They used to be a rare sight in my butterfly garden, but this year are the most common sight so far. The Orange Cestrum (Cestrum aurantiacum) is the most popular plant in the garden so far this year too. It’s grown too big for its spot though and needs to be moved or at least severely pruned this Fall.

View the photo on Flickr

MyCokeRewards vs. PepsiStuff

I’ve been thinking about a quick and probably oversimple financial analysis of the benefits of the MyCokeRewards.com and PepsiStuff.com rewards programs. I’m typically more of a drinker of Coca-Cola products–mainly Coke Zero and Powerade (after kayaking or cycling)–and have participated in that program for much longer, but the affiliation of PepsiStuff with Amazon.com and the ability to buy music there with the points has gotten me interested in that program as well.

The simpler analysis is probably PepsiStuff. One 20 oz. bottle gets you one point. Five points gets you a song download on Amazon. A song typically goes for 89 cents. So each point is worth about 18 cents. The caveat is that not every song is buyable in this manner.

With MyCokeRewards, I often redeem 220 points for a gold movie pass good at AMC Theatres. The maximum current price of an AMC movie ticket is $9.50. The makes each point worth about 4 cents. One 20 oz. bottle of soda gets you three points, making the value of the points per bottle about 12 cents. I often buy my Coke products in 12-packs, however, and the point value on the 12-pack then works out to 40 cents.

I also saw a sign on the convenience store door that said MyCokeRewards was like, “buy eight, get one free” on 20 oz. bottles. In that case, if the store charges $1.39 for your 20 oz. bottle, the value per point is close to 6 cents and the point value per bottle works out to about 18 cents, which gets us back into the PepsiStuff value ballpark per 20 oz. bottle purchased.

I might have to do a further exercise to see if the point differential would make it beneficial to buy six-packs of 24 oz. plastic bottles rather than 12-packs of 12 oz. cans. Then you’d have to get into the eco-friendliness of plastic bottles vs. aluminum cans, too. I always recycle both, btw.