Adds elevation file to project

def set_elevation(self, elevation_grid_path, mask_shapefile):
        """
        Adds elevation file to project
        """
        # ADD ELEVATION FILE
        ele_file = ElevationGridFile(project_file=self.project_manager,
                                     session=self.db_session)
        ele_file.generateFromRaster(elevation_grid_path,
                                    mask_shapefile,
                                    load_raster_to_db=self.load_rasters_to_db)