The last value ( 0/1 ) is handy as it allows us to specify, say, 0 seconds if we only want to provide degrees and fractional minutes. EXIF stores GPS coords as rational64u which is a list of. Consider the following values, (where ‘/’ should be read as ‘over’ or ‘divided by’):Ĭ.) 52.97790 = 52977900 / 1000000 (52977900 millionths) Some exif data that i extracted has metadata listed as above. The first word specifies the value’s magnitude while the second denominates the units. The EXIF latitude field allows you to specify the angle in all of these forms, it is made up of 3 parts as follows:Įach part is an EXIF Rational, it is hard to find a description of its format, but a an EXIF rational contains two 4-byte words and is like a fraction. Exif Metadata lets you quickly and easily view, edit, and remove metadata, including GPS location, from your iPhone and iPad photos. Common ways of expressing these angles are:ĭegrees, minutes & seconds (with decimal places) So, latitude (and longitude) can be expressed in different ways bit it is essentially just an angle. This is very handy as loads of applications like GIS systems and google maps etc can correctly geographically position your images.Īs usual I started in the middle rather than starting at the beginning and got a bit confused by how GPS latitude and longitude fields are specified in EXIF, so I decided to try to describe it here with pictures (so that I can test out the google drawing app). I have been developing some software to geotag jpeg images by adding EXIF GPS information using libEXIF.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |