<P> In order to capture GPS data at the time the photograph is captured, the user must have a camera with built in GPS or a standalone GPS along with a digital camera . Because of the requirement for wireless service providers in United States to supply more precise location information for 911 calls by September 11, 2012, more and more cell phones have built - in GPS chips . Most smart phones already use a GPS chip along with built - in cameras to allow users to automatically geotag photos . Others may have the GPS chip and camera but do not have internal software needed to embed the GPS information within the picture . A few digital cameras also have built - on or built - in GPS that allow for automatic geotagging . Devices use GPS, A-GPS or both . A-GPS can be faster getting an initial fix if within range of a cell phone tower, and may work better inside buildings . Traditional GPS does not need cell phone towers and uses standard GPS signals outside of urban areas . Traditional GPS tends to use more battery power . Almost any digital camera can be coupled with a stand - alone GPS and post processed with photo mapping software, to write the location information to the image's exif header . </P> <P> GPS coordinates may be represented in text in a number of ways, with more or fewer decimals: </P> <Table> <Tr> <Th> Template </Th> <Th> Description </Th> <Th> Example </Th> </Tr> <Tr> <Td> (-) d.d, (-) d.d </Td> <Td> Decimal degrees with negative numbers for South and West . </Td> <Td> 12.3456, - 98.7654 </Td> </Tr> <Tr> <Td> d ° m.m ′ (N S), d ° m.m ′ (E W) </Td> <Td> Degrees and decimal minutes with N, S, E or W suffix for North, South, East, West </Td> <Td> 12 ° 20.736 ′ N, 98 ° 45.924 ′ W </Td> </Tr> <Tr> <Td> (N S) d ° m.m ′ (E W) d ° m.m ′ </Td> <Td> Degrees and decimal minutes with N, S, E or W prefix for North, South, East, West </Td> <Td> N 12 ° 20.736 ′, W 98 ° 45.924 ′ </Td> </Tr> <Tr> <Td> d ° m' s" (N S), d ° m' s" (E W) </Td> <Td> Degrees, minutes and seconds with N, S, E or W suffix for North, South, East, West </Td> <Td> 12 ° 20' 44" N, 98 ° 45' 55" W </Td> </Tr> <Tr> <Td> (N S) d ° m' s ", (E W) d ° m' s" </Td> <Td> Degrees, minutes and seconds with N, S, E or W prefix for North, South, East, West </Td> <Td> N 12 ° 20' 44 ", W 98 ° 45' 55" </Td> </Tr> </Table> <Tr> <Th> Template </Th> <Th> Description </Th> <Th> Example </Th> </Tr>

Where are gps coordinates stored in an image