How to add a location to photos without GPS

Step 1: work out where it was taken

• Use neighbouring photos. If you took a phone photo with GPS within an hour or two of the camera photo, you were almost certainly in the same place. Sort by date and look at what's next to it.
• Use the date. Trips happen on known dates. A photo from 14 May, when you were in Lisbon from 12 to 16 May, belongs in Lisbon.
• Use what's in the picture. Street signs, landmarks and shop names can pin down the exact spot in Google Maps or Street View.

Step 2: add the location

iPhone and iPad: open the photo, swipe up, tap Add Location (or Adjust) and search for the place.

Mac Photos: select the photo, press ⌘I and type a place into the location field in the Info window. You can select several photos and assign one place to all of them.

Google Photos: open the photo, swipe up, tap the edit icon next to the location, and search for the place.

Windows: File Explorer can't edit GPS fields. Use a free tool such as GeoSetter or ExifTool, or set the location in your photo app instead.

Let Trailroll suggest the place

If you're putting photos on a travel map, Trailroll does step 1 for you. When you upload a photo without GPS, it looks at your other photos taken within three days and suggests the most likely place. You confirm it with one tap, or open the map, search for a place and drop the pin yourself.

Photos you don't place stay in a list, so you can come back to them later.

Camera photos: geotag automatically next time

Most modern cameras from Canon, Nikon, Sony and Fujifilm can take the location from your phone over Bluetooth through the maker's app. Turn it on before a trip and every camera photo gets GPS coordinates without any extra work.