3 ms·

Thank you for liking it. Face recognition involves more models, and about geolocation information, you can actually get latitude and longitude from photos, but

Thank you for liking it. Face recognition involves more models, and about geolocation information, you can actually get latitude and longitude from photos, but converting them to specific cities and neighborhoods requires access to geolocation servers, which will cause the app to have to be networked, which is not what I would like to see.

ankit_mishra 4y ago
Is it a possibility to have some sort of offline database to query against ? Or maybe that would make the app to heavy. Could be a "opt-in" download.
- mazzystar 4y ago
  Maybe an offline mapping table + a bit of similarity algorithm can roughly solve this problem, just not too precise for cities.
  - geocar 4y ago
    Why not? How many cities do you think there are? Including a dump of just lat/lon/rad->city from openstreetmap probably kilobytes. Including towns and features might be low megabytes.
    - mazzystar 4y ago
      Maybe you're right, I'll try.
      - tough 4y ago
        Mapbox added offline map support a few years back on their SDKs, Found a couple medium articles on it, but no code to share. Wondering if there might be any mapbox FOSS replacements that offer this?
        mazzystar 4y ago
        My current idea is probably: store the latitude and longitude of major cities in the world in a txt file, load it, and then estimate the distance based on the difference between them and the current photo, not sure about the space taken and the time consumed.
DerWOK 4y ago
For Geo-Location, maybe consider this workflow: User searches City in the iPhone Maps App (by Apple), then clicks "Share" button, then "Copy to Clipboard" - thenpaste this location into your app, you grab Longitude & Latitude from that and let users specify a radius. Bam! Complicated.... But no network needed.
- netsharc 4y ago
  Someone else has commented with a list of cities which could be included offline: https://news.ycombinator.com/item?id=34690693 https://news.ycombinator.com/item?id=34690693 But your workflow is such a hassle that I doubt many people would do it. A more realistic flow (without the list of places above) would be to show an image of the world map, allow the user to zoom in, and let them drop a pin on the map. They can drop a pin near some pixels labeled Paris, but the app doesn't need to know that it's Paris, it just needs to translate the pixel coordinates of the pin (relative to the image) to geographical coordinates, and look for images close to these coordinates.
  - 4lun 4y ago
    Potentially the app could link out to a hosted webpage that allows selecting a location using a decent map and search UI, with network capability (but without requiring it in app) Then on selecting a location you present a button that then jumps you back into the app via a universal link (passing in lon/lat)
shp0ngle 4y ago
If I was you, I would not try to add the geolocation, you won’t match google anyway and it will take you way too much time. But up to you

ankit_mishra 4y ago

Is it a possibility to have some sort of offline database to query against ? Or maybe that would make the app to heavy. Could be a "opt-in" download.

mazzystar 4y ago
Maybe an offline mapping table + a bit of similarity algorithm can roughly solve this problem, just not too precise for cities.
- geocar 4y ago
  Why not? How many cities do you think there are? Including a dump of just lat/lon/rad->city from openstreetmap probably kilobytes. Including towns and features might be low megabytes.
  - mazzystar 4y ago
    Maybe you're right, I'll try.
    - tough 4y ago
      Mapbox added offline map support a few years back on their SDKs, Found a couple medium articles on it, but no code to share. Wondering if there might be any mapbox FOSS replacements that offer this?
      - mazzystar 4y ago
        My current idea is probably: store the latitude and longitude of major cities in the world in a txt file, load it, and then estimate the distance based on the difference between them and the current photo, not sure about the space taken and the time consumed.

DerWOK 4y ago

For Geo-Location, maybe consider this workflow: User searches City in the iPhone Maps App (by Apple), then clicks "Share" button, then "Copy to Clipboard" - thenpaste this location into your app, you grab Longitude & Latitude from that and let users specify a radius. Bam! Complicated.... But no network needed.

netsharc 4y ago
Someone else has commented with a list of cities which could be included offline: https://news.ycombinator.com/item?id=34690693 https://news.ycombinator.com/item?id=34690693 But your workflow is such a hassle that I doubt many people would do it. A more realistic flow (without the list of places above) would be to show an image of the world map, allow the user to zoom in, and let them drop a pin on the map. They can drop a pin near some pixels labeled Paris, but the app doesn't need to know that it's Paris, it just needs to translate the pixel coordinates of the pin (relative to the image) to geographical coordinates, and look for images close to these coordinates.
- 4lun 4y ago
  Potentially the app could link out to a hosted webpage that allows selecting a location using a decent map and search UI, with network capability (but without requiring it in app) Then on selecting a location you present a button that then jumps you back into the app via a universal link (passing in lon/lat)

shp0ngle 4y ago

If I was you, I would not try to add the geolocation, you won’t match google anyway and it will take you way too much time. But up to you