After taking photos, you download the photos and GPS data to your computer. The GPS-Photo Link software (US$229; free demo available) matches photos with GPS data, and then marks photos with the GPS data. The software also links coordinates to AVI movies taken with the camera. ESRI Shape files are created for use with as ESRI's ArcView GIS.
The press release quotes a customer who uses the package to photograph houses for sale and label them with their MLS numbers for virtual tours on the Web. Other uses include asset mapping, surveying, weed mapping, trail conditions, crime scene investigations, and aerial photography -- recognizing that civilian GPS units are inaccurate to 10ft horizontally and 100ft vertically.
The software works with just about any digital camera (all it needs is the date and time stamp for the photos) and most GPS receivers. There is a bit of initialization required in the field, to ensure the software can match GPS readings with photos.
As an alternative, GeoSpatial Experts sells a CompactFlash-sized GPS receiver ($150) that slides into Ricoh's Caplio Pro G3 camera ($850). That gives you a single unit, but would not work with my digital camera, because it needs the CompactFlash slot for the memory on which to store the photos!
GeoSpatial Experts has an online demo that helps explain the process.
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