Photo GeoTag is an application that lets you geotag PNG, TIFF and JPEG files, or alter their current geotag data. It’s an excellent way to append or modify any JPEG, TIFF, or PNG file’s GPS properties. This functionality comes in handy if you have many pictures with zero or incorrect GPS values. When you open an image using Photo GeoTag, the map and image show up in a single window. In case the picture has GPS traits, the map would have a pin indicating the GPS location. Just drag the pin to another location if you want to modify the longitudinal and latitudinal GPS properties. There is also a batch mode for assigning one location to many files.