I photo many details for job with my smartphone and I have turn on the geotag option.
Those info are in the jpg file? If so how can I extract them?
If you took the photos without geo-tagging turned on, there's no way for you to get the information you need from those photographs.
However, if geo-tagging was turned on at the time you took the photos, you can read the info like so:
exiftool <image.jpg> | grep GPS