How to convert GeoPackage to MBTiles vector tiles on Android

[huytm2k3]

What is the bug?

Cannot convert gpkg to mbtitles with ogr2ogr.java

Steps to reproduce the issue

I'm trying to convert a .gpkg file to MBTiles vector format on Android with ogr2ogr.java (https://github.com/OSGeo/gdal/blob/master/swig/java/apps/ogr2ogr.java) But it throws this error: Only Byte supported. (Although it works if I replace MBTiles driver with GeoJSON)

How do I fix that?

Many thanks!

Versions and provenance

3.7.0

Additional context

No response

[huytm2k3]

This is my React Native JS code:

const result = await GdalModule.RNOgr2ogr([
        '-f', 'MBTiles',
        outputPath,
        primaryFile.destinationPath,
        '-s_srs', 'EPSG:4326',
        '-t_srs', 'EPSG:3857',
        '-dsco', 'MAXZOOM=20',
        '-dsco', 'MINZOOM=12',
        '-dsco', 'FORMAT=MBTILES',
        '-dsco', 'MAX_SIZE=1500000',
        '-dsco', 'EXTENT=8192',
        '-lco', 'MAXZOOM=20',
        '-lco', 'MINZOOM=12'
])

And my native code:

@ReactMethod
    public void RNOgr2ogr(ReadableArray args, Promise promise) {
        try {
            // Convert ReadableArray to String[]
            String[] strArgs = new String[args.size()];
            for (int i = 0; i < args.size(); i++) {
                strArgs[i] = args.getString(i);
            }
            // Pass the string array to ogr2ogr
            ogr2ogr.main(strArgs);
            promise.resolve("Success");
        } catch (Exception e) {
            promise.reject("GDAL_ERROR", e);
        }
    }

[lnicola]

This comes from https://github.com/OSGeo/gdal/blob/master/frmts/mbtiles/mbtilesdataset.cpp#L2997-L3001.

Just to make sure, you said that the equivalent ogr2ogr invocation (with all the creation options) works on a computer?

[huytm2k3]

This comes from https://github.com/OSGeo/gdal/blob/master/frmts/mbtiles/mbtilesdataset.cpp#L2997-L3001.

Just to make sure, you said that the equivalent ogr2ogr invocation (with all the creation options) works on a computer?

Yes, it works on my computer when I use ogr2ogr with all the creation options above

[jratike80]

The error comes from a wrong raster data type. It is an odd error if ogr2ogr is used. Maybe your Android build lacks something that is needed for MBTiles vectors. Does it have GEOS?

[huytm2k3]

The error comes from a wrong raster data type. It is an odd error if ogr2ogr is used. Maybe your Android build lacks something that is needed for MBTiles vectors. Does it have GEOS?

I think I'm really missing GEOS, I'm trying to rebuild gdal.

Thank you <3

[rouault]

I should note that ogr2ogr.java is more a "toy" application nowadays compared to the C++ ogr2ogr, although it should still work OK for basic use cases. You might better succeed with org.gdal.gdal.VectorTranslate(): https://gdal.org/en/latest/java/org/gdal/gdal/gdal.html#VectorTranslate(java.lang.String,org.gdal.gdal.Dataset,org.gdal.gdal.VectorTranslateOptions) , which is the API entry point for ogr2ogr. In any case, you should definitely first by starting to have a GDAL build against GEOS to be able to generate vector tiles.