FileCOGLayerWriter.write from SparkCOGExamples issue

I desperately try to apply the example given in https://github.com/locationtech/geotrellis/blob/master/doc-examples/src/main/scala/geotrellis/doc/examples/spark/COGSparkExamples.scala, 'Having an RDD ...' with a srtm geotiff as follow:

   val conf = new SparkConf()
      .setMaster("local[*]")
      .setAppName("geotiff-tiler-spark")
      .set("spark.driver.host", "localhost")

    implicit val sc: SparkContext = new SparkContext(conf)

    val localGeoTiffPath =
      new java.io.File(new java.io.File(".").getCanonicalFile, "./data/srtm_39_03.tif").getAbsolutePath

    val localCatalogPath =
      new java.io.File(new java.io.File(".").getCanonicalFile, "./data/catalog").getAbsolutePath

    val rdd: RDD[(ProjectedExtent, Tile)] = HadoopGeoTiffRDD.spatial(new Path(localGeoTiffPath))

    val layoutScheme                                         = FloatingLayoutScheme(512)
    val (zoom: Int, metadata: TileLayerMetadata[SpatialKey]) = rdd.collectMetadata[SpatialKey](layoutScheme)
    val tilerOptions = Tiler.Options(resampleMethod = Bilinear, partitioner = Some(new HashPartitioner(rdd.partitions.length)))

    val tiledRdd                           = rdd.tileToLayout[SpatialKey](metadata, tilerOptions)
    val layerRdd: TileLayerRDD[SpatialKey] = ContextRDD(tiledRdd, metadata)

    val attributeStore = FileAttributeStore(localCatalogPath)
    val writer         = FileCOGLayerWriter(attributeStore)

    writer.write(layerName = "srtm_39_03", tiles = layerRdd, tileZoom = zoom, keyIndexMethod = ZCurveKeyIndexMethod)

But when the FileCOGLayerWriter write operation is executed, I got the following error:

Exception in thread "main" java.lang.RuntimeException: Tile Layout of layer and ZoomedLayoutScheme do not match. LayoutDefinition(Extent(10.0, 44.88000000000005, 15.120000000000015, 50.0),CellSize(8.333333333333358E-4,8.333333333333248E-4),12x12 tiles,6144x6144 pixels) != LayoutDefinition(Extent(-180.0, -89.99999, 179.99999, 89.99999),CellSize(0.70312498046875,0.3515624609375),1x1 tiles,512x512 pixels)

which corresponds to an assertion from COGLayer.scala:

if(rdd.metadata.layout != layoutScheme.levelForZoom(baseZoom).layout) {
    sys.error(s"Tile Layout of layer and ZoomedLayoutScheme do not match. ${rdd.metadata.layout} != ${layoutScheme.levelForZoom(baseZoom).layout}")
}

Any idea or explanation ?

For information, here is gdalinfo output of the srtm file:

gdalinfo srtm_39_03.tif
Driver: GTiff/GeoTIFF
Files: srtm_39_03.tif
Size is 6000, 6000
Coordinate System is:
GEOGCRS["WGS 84",
    ENSEMBLE["World Geodetic System 1984 ensemble",
        MEMBER["World Geodetic System 1984 (Transit)"],
        MEMBER["World Geodetic System 1984 (G730)"],
        MEMBER["World Geodetic System 1984 (G873)"],
        MEMBER["World Geodetic System 1984 (G1150)"],
        MEMBER["World Geodetic System 1984 (G1674)"],
        MEMBER["World Geodetic System 1984 (G1762)"],
        MEMBER["World Geodetic System 1984 (G2139)"],
        ELLIPSOID["WGS 84",6378137,298.257223563,
            LENGTHUNIT["metre",1]],
        ENSEMBLEACCURACY[2.0]],
    PRIMEM["Greenwich",0,
        ANGLEUNIT["degree",0.0174532925199433]],
    CS[ellipsoidal,2],
        AXIS["geodetic latitude (Lat)",north,
            ORDER[1],
            ANGLEUNIT["degree",0.0174532925199433]],
        AXIS["geodetic longitude (Lon)",east,
            ORDER[2],
            ANGLEUNIT["degree",0.0174532925199433]],
    USAGE[
        SCOPE["Horizontal component of 3D system."],
        AREA["World."],
        BBOX[-90,-180,90,180]],
    ID["EPSG",4326]]
Data axis to CRS axis mapping: 2,1
Origin = (10.000000000000000,50.000000000000000)
Pixel Size = (0.000833333333333,-0.000833333333333)
Metadata:
  AREA_OR_POINT=Area
Image Structure Metadata:
  INTERLEAVE=BAND
Corner Coordinates:
Upper Left  (  10.0000000,  50.0000000) ( 10d 0' 0.00"E, 50d 0' 0.00"N)
Lower Left  (  10.0000000,  45.0000000) ( 10d 0' 0.00"E, 45d 0' 0.00"N)
Upper Right (  15.0000000,  50.0000000) ( 15d 0' 0.00"E, 50d 0' 0.00"N)
Lower Right (  15.0000000,  45.0000000) ( 15d 0' 0.00"E, 45d 0' 0.00"N)
Center      (  12.5000000,  47.5000000) ( 12d30' 0.00"E, 47d30' 0.00"N)
Band 1 Block=6000x1 Type=Int16, ColorInterp=Gray
  NoData Value=-32768

Start with doc-examples/src/main/scala/geotrellis/doc/examples/spark/COGSparkExamples.scala and the assertion in COGLayer.scala. Reproduce the supplied SRTM example, inspect the reported tile layouts, and determine whether the example or writer behavior is incorrect. Done means the example has a documented or verified resolution and no longer fails at write time.