text: CREATE TABLE if not exists parks (
      id serial primary key,
      osm_id integer unique,
      name character varying(255),
      contour geometry,
      contour_913 geometry
  );
  
  create index parks_id_ind on parks (id);
  delete from parks;
  
  insert into parks ( osm_id, name, contour_913, contour )
  	select osm_id, name, way, st_transform(way, 4326)
  		from osm_polygon
  		where name is not null and leisure='park';
  
  