I use this for photographing field locations for veg sampling. I can stamp the photo with date, time and UTM coordinates. Using iPhone 6 the nominal precision is usually five meters. I extract the EXIF on a PC with a little utility called "BRs EXIF Extractor" and with just a little spreadsheet manipulation I can pull the points into GIS, overlay on an aerial image, label them with the time stamp, and quickly and definitively assign photos to geographic locations. Subjectively it seems actualy horizontal resolution is better than indicated. Happy camper.