Skip GPS data if values are 0

[aciccarello]

It looks like Google outputs a default GPS coordinate of 0 for photos that don't have a location. Perhaps setting these values in the processed files could be skipped so it doesn't look like they have a location when they don't.

{
  "geoData": {
    "latitude": 0.0,
    "longitude": 0.0,
    "altitude": 0.0,
    "latitudeSpan": 0.0,
    "longitudeSpan": 0.0
  },
  "geoDataExif": {
    "latitude": 0.0,
    "longitude": 0.0,
    "altitude": 0.0,
    "latitudeSpan": 0.0,
    "longitudeSpan": 0.0
  }
}