Process location precision in EXIF

[DJTommek]

According EXIF standards there is property GPSDop, which is precision of provided location. From this source it might look like this: exif:GPSDop=18000/1000.

Extra task

Add warning to BetterLocation message, if location is not accurate.

TODO

• Explanation is needed. Is this value in meters or needs to be calculated?
• Example image with GPSDop filled is needed

Sources

• https://gis.stackexchange.com/questions/22223/does-a-geotagged-image-contain-information-about-its-accuracy
• https://frankhjung.wordpress.com/2016/09/26/using-gps-information-in-an-image/
• https://exiftool.org/TagNames/GPS.html
• https://exiv2.org/tags.html
• https://www.cipa.jp/std/documents/e/DC-008-2012_E.pdf

[DJTommek]

Done in 94eb750f801cbe413a01c742639621af5b8ed0a0 using EXIF tag GPSHPositioningError.