code: def warp(self, srid=None, format=None, geom=None):
          
          clone = self._clone()
          for obj in clone:
              obj.convert(format, geom)
              if srid:
                  fp = tempfile.NamedTemporaryFile(suffix='.%s' % format or '')
                  with obj.raster() as r, r.warp(srid, fp.name) as w:
                      obj.image.file = fp
          return clone
docs: Returns a new RasterQuerySet with possibly warped/converted rasters.
  
          Keyword args:
          format -- raster file extension format as str
          geom -- geometry for masking or spatial subsetting
          srid -- spatial reference identifier as int for warping to