Android GPS Format

[maximilianloy]

Hi, the GPS data returned on Android is pretty weird. Is this normal?

{ aperture: "1.29" datetime: "2016:11:08 20:36:49" exposureTime: "0.083333335" flash: "65" focalLength: "3097/1000" gpsAltitude: "84000/100" gpsAltitudeRef: "0" gpsDateStamp: "2016:11:08" gpsLatitude: "45/1,30/1,4608/100" gpsLatitudeRef: "N" gpsLongitude: "10/1,18/1,1928/100" gpsLongitudeRef: "E" gpsProcessingMethod: null gpsTimestamp: "19:36:46" iso: "2773" make: "htc" model: "Nexus 9" orientation: "1" whiteBalance: "0" }

Tested it on Nexus 5 (Android 6.0.1) and Nexus 9 (Android 7.0)

[pugwonk]

(I'm just another random dev) I had the same issue - they're in degrees/minutes/seconds with optional multipliers. From a bit of research it's this that seems to be in the actual EXIF spec, though.

Here's some code I wrote to make sense of them...

    function EXIFtoLocation(stringDMS){
        function EXIFdivide(dStr) {
            num = dStr.split('/');
            return num[0] / num[1];
        }
        var DMS = stringDMS.split(",");

        return EXIFdivide(DMS[0]) + (EXIFdivide(DMS[1])/60) + (EXIFdivide(DMS[2])/3600);
    };

                if (metadata.GPS != null) { // iOS
                    // iPhone uses different fields
                    var lat = metadata.GPS.Latitude;
                    var lon = metadata.GPS.Longitude;
                    var latref = metadata.GPS.LatitudeRef;
                    var lonref = metadata.GPS.LongitudeRef;

                } else { // Android
                    var lat = EXIFtoLocation(metadata.gpsLatitude);
                    var lon = EXIFtoLocation(metadata.gpsLongitude);
                    var latref = metadata.gpsLatitudeRef;
                    var lonref = metadata.gpsLongitudeRef;

                }

                if (latref == "S")
                    lat = -lat;
                if (lonref == "W")
                    lon = -lon;

Agree though, it would be handy if some of this were in the plugin.

[maximilianloy]

I created PR #11 which fixes this on Android. There is actually already a function provided by the Android EXIF API to convert lat/lng and altitude. But good to know that I need to switch the sign on iOS too. I am testing in N/E so didn't notice this :-)

[pugwonk]

I've submitted a PR to your fork (hopefully that was the right way to do it!).

[enokby]

thanks man you're another dev who saved my life

[manix]

@pugwonk MVP