Vtm online map servers

[Psijic]

Tried to use Vtm with online public servers but didn't find any free. Is there a list or it's a crap idea? Looks like UrlTileSource need to be used, but found only OSciMap4TileSource and custom MapnikVectorTileSource classes for it.
Tried with this sample code but looks like all is outdated and URLs dumped. Got only scale bar and gray background rendered.

@Composable
fun VtmMapView() {
    val mapView = rememberMapViewWithLifecycle()
    with (mapView.map()){
        // Scale bar
        val mapScaleBar: MapScaleBar = DefaultMapScaleBar(mapView.map())
        val mapScaleBarLayer = MapScaleBarLayer(mapView.map(), mapScaleBar)
        mapScaleBarLayer.renderer.setPosition(GLViewport.Position.BOTTOM_LEFT)
        mapScaleBarLayer.renderer.setOffset(5 * CanvasAdapter.getScale(), 0f)
        mapView.map().layers().add(mapScaleBarLayer)

        val tileSource = OSciMap4TileSource() // or MapnikVectorTileSource()

        // Vector layer
        val tileLayer: VectorTileLayer = mapView.map().setBaseMap(tileSource)

        // Building layer
        layers().add(BuildingLayer(mapView.map(), tileLayer))

        // Label layer
        layers().add(LabelLayer(mapView.map(), tileLayer))

        setMapPosition(52.517037, 13.38886, 12.0)
    }

    AndroidView(factory = { mapView }) {}
}

class MapnikVectorTileSource : UrlTileSource("https://d1s11ojcu7opje.cloudfront.net/dev/764e0b8d", "") {
    init {
        urlFormatter = TileUrlFormatter { tileSource, tile -> // url formatter for mapbox streets
            val hexTable = byteArrayOf(
                '0'.code.toByte(), '1'.code.toByte(), '2'.code.toByte(), '3'.code.toByte(),
                '4'.code.toByte(), '5'.code.toByte(), '6'.code.toByte(), '7'.code.toByte(),
                '8'.code.toByte(), '9'.code.toByte(), 'a'.code.toByte(), 'b'.code.toByte(),
                'c'.code.toByte(), 'd'.code.toByte(), 'e'.code.toByte(), 'f'
                    .code.toByte()
            )
            val sb = StringBuilder()
            sb.append('/')
            sb.append(hexTable[tile.tileX % 16].toInt())
            sb.append(hexTable[tile.tileY % 16].toInt())
            sb.append('/')
            sb.append(tile.zoomLevel.toInt())
            sb.append('/')
            sb.append(tile.tileX)
            sb.append('/')
            sb.append(tile.tileY)
            sb.toString()
        }
    }

    override fun getDataSource(): ITileDataSource {
        return UrlTileDataSource(this, TileDecoder(), httpEngine)
    }
}

[Psijic]

Chatbot says there are some. Is there any for free usage?

There are a few options for online vector tile servers that can be used with mapsforge and VTM:

OpenMapTiles
Vector tiles hosted by OpenMapTiles
Global coverage
https://openmaptiles.com/
Example URL: https://free-{subDomain}.tilehosting.com/data/v3/{z}/{x}/{y}.pbf

OpenStreetMap Vector Tiles
Vector tiles generated from OpenStreetMap data
Global coverage
https://osm-vector-tiles.tileserver.ch/
Example URL: https://osm-vector-tiles.tileserver.ch/data/v3/{z}/{x}/{y}.pbf

MapTiler Cloud
Freemium vector tiles with Mapsforge maps
Global coverage
https://www.maptiler.com/cloud/
Example URL: https://api.maptiler.com/tiles/v3/{z}/{x}/{y}.pbf?key={apiKey}

Nextzen Vector Tiles
Global vector tiles with building footprints
Free low volume usage
https://www.nextzen.org/documentation/vector-tiles/
Example URL: https://tile.nextzen.org/tilezen/vector/v1/all/{z}/{x}/{y}.mvt

Mapbox Vector Tiles
Requires API key
High detail data with custom styling
https://www.mapbox.com/vector-tiles

[devemux86]

See also the samples, like OpenMapTilesMvtActivity, MapilionMvtActivity.

[Psijic]

Tried val tileSource = OSciMap4TileSource("https://tile.nextzen.org/tilezen/vector/v1/256/all/{Z}/{X}/{Y}.mvt?api_key=my_key") but it doesn't work. Are these tiles supported?

[devemux86]

Some servers may no longer work.

Also study the examples, there is NextzenMvtActivity with NextzenMvtTileSource.

[Psijic]

Surprisingly, it's not included in the main library.
Tried this code to implement but failed:

class NextzenTileSource(
    apiKey: String,
    urlString: String = "https://tile.nextzen.org/tilezen/vector/v1/all",
    tilePath: String = "{z}/{x}/{y}.mvt"
) : UrlTileSource(urlString, tilePath) {

    init {
        setApiKey(apiKey)
    }

    override fun getDataSource(): ITileDataSource {
        return UrlTileDataSource(this, TileDecoder(), httpEngine)
    }

    override fun getTileUrl(tile: Tile): String {
        return "${url}/${tile.zoomLevel}/${tile.tileX}/${tile.tileY}.mvt"
    }

}

Will try to convert that java class.

[devemux86]

It cannot because it requires extra dependencies.

[Psijic]

I copied this class to my project and only added 1 import: import org.oscim.tiling.source.mapzen.TileDecoder;

[Psijic]

Dat Java. Is it correct implementation? I see no errors in Logcat.
val tileSource = NextzenMvtTileSource.builder().url("https://tile.nextzen.org/tilezen/vector/v1/256/all/{Z}/{X}/{Y}.mvt").apiKey(apiKey).build()
Also tried to use only the key cause URL is already implemented.
val tileSource = NextzenMvtTileSource.builder().apiKey(apiKey).build()

Maybe the server is down:
Nextzen is experimenting with a lower cost cached mode. Please contact [email protected] with questions.

[Psijic]

Somehow launched Android sample with working maps: Simple map works only with few Berlin areas and high scale.
Nextzen miss some areas/scales partially, like tiles download by UDP with drops. Some scales doesn't show labels in Europe at all except UK London city.
Mapilion works quite smoothly especially disabling extra shadows. But it has a restricted key and free commercial keys are unavailable.
Cache is disabled.