def METHOD_NAME(uri: str) -> str:
    crs_tf = RasterioCRSTransformer.from_uri(uri)
    xmin, ymin = crs_tf.pixel_to_map((0, 0))
    xmax, ymax = crs_tf.pixel_to_map((10, 10))
    polygon = Polygon.from_bounds(xmin, ymin, xmax, ymax)
    geometry = mapping(polygon)
    feature = geometry_to_feature(geometry, properties=dict(class_id=1))
    geojson = features_to_geojson([feature])
    return geojson