GPS coordinates always positive – missing hemisphere sign

[thomasjjj]

Description

When extracting EXIF GPS data, the script converts latitude and longitude to decimal degrees but does not check the hemisphere reference tags (GPSLatitudeRef and GPSLongitudeRef).

As a result, coordinates in the southern and western hemispheres are always plotted as positive, ending up in the wrong place on the map.

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An image with:

• GPSLatitude = 23°32′
• GPSLatitudeRef = "S"
  should be -23.55, but it is stored as +23.55.

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Before storing the decimal degrees, apply:

if lat_ref == 'S':
    lat_dd *= -1
if lon_ref == 'W':
    lon_dd *= -1

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Impact

All south/west coordinates are incorrect.

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