docs: def addlayer(self, name, srs, geomType):
          """
          add a layer to the vector layer
  
          Parameters
          ----------
          name: str
              the layer name
          srs: int, str or :osgeo:class:`osr.SpatialReference`
              the spatial reference system. See :func:`spatialist.auxil.crsConvert` for options.
          geomType: int
              an OGR well-known binary data type.
              See `Module ogr <https://gdal.org/python/osgeo.ogr-module.html>`_.
  
          Returns
          -------
  
          """
          self.vector.CreateLayer(name, srs, geomType)
          self.init_layer()