
Geotagging a photo means writing a latitude and longitude into the file itself. Here are the four steps, what the photo actually stores, and the one missing field that sends a correct coordinate to the wrong hemisphere.

Google's photo uploader has no location field, so a geotag has to go into the file before it leaves your computer. Here is how to put it there, and what three published tests say it will and will not do.

The claim that geotagged photos lift local rankings has now been tested: one metric of seven improved and four got worse. Here is what the evidence actually supports, what Google documents instead, and where photo location still earns its place.