I’ve never been on the Paseo de Bosque trail from one end to the other, so this Saturday afternoon seemed like a good time to try it. Together with Marvin and Jerry, we started out in mid afternoon from the Alameda Open Space parking lot.
Paseo de Bosque is a paved multi-use trail along the east bank of the Rio Grande. It gets a lot of use from hikers, bikers, and roller-bladers. It’s not unusual to see mothers on roller-blades pushing their kids in baby carriages. There’s even a yellow center line painted on the trail to help with traffic. Paseo de Bosque is located within the Rio Grande Valley State Park and is regularly patrolled by police on mountain bikes.
iPhone Camera Roll Limitation
Because I was with others, I did not take my Pentax camera that requires a backpack and extra time to take pictures. My intention was to take photos with my iPhone, which takes OK pictures and is a lot easier to carry. In the process I found a limitation of the iPhone. I have the 8Gb 3G model, which is a couple years old by now. It seems there is a limit to the number of photos that can be stored on the Camera Roll. I had taken several pictures earlier and had not downloaded them to the computer. Part way into this ride the iPhone refused to take any more pictures. I had a second camera app installed, so I tried it, with no better results. So I did not get as many pictures as I wanted.
In analyzing the situation, I believe I know what happened. The iPhone simply ran out of memory to store more photos. At first thought this seems strange, as even the 8Gb model can show hundreds of pictures in the Photos app. But on reflection the reasons become clear.
Photos taken by the iPhone are stored in the Camera Roll at their full resolution (2.0 mega-pixels for my 3G). I have my iPhone crammed full of apps, audio, and photos, so new photos use up the free space fairly quickly. Once available space is used up, no more photos can be taken. I do wish there was a message like “Out of Memory” that displayed, rather than just not working. I was afraid the iPhone had broken in some way.
Once the photos are downloaded to my computer and deleted from the Camera Roll, they can be uploaded to the iPhone for viewing. I’m not sure how this works under Windows, but on my iMac the iTunes program fetches the photos from iPhoto, compresses them, and does the upload when I sync the iPhone. Most of the time the compression is invisible but when the set of photos to be uploaded is large, I can see a progress bar as compression is proceeding.
Camera+ App Doesn’t Geotag Photos
Another surprise I found when I downloaded the photos from the iPhone was that they were not geotagged with the location of where the photo was taken. I know the iPhone (Camera app) geotags photos, from earlier experiments I had done. This time I was using Camera+, because it has some pretty snazzy editing features. Geotags were not included in the photo files created by Camera+.
Photos taken by Camera+ first go into a temporary holding area called the Lightbox. Here is where the editing effects can be applied. After any edits are applied, the photo is saved to the Camera Roll. From there it is handled like any other photo by iOS. Somewhere in this process the geotags are deleted, or were never applied in the first place. For my adventures, I want to know where the photo was taken. If I’m using the iPhone, I usually don’t have a GPS track running, so it’s important to me for the photo to be geotagged by the iPhone. I won’t be using Camera+ any more, at least until this issue gets fixed.
The three of us spent a lot of time solving the world’s problems, and consequently ran out of daylight. The trip to the south terminus of Paseo de Bosque will have to wait for another day.