CREATE OR REPLACE FUNCTION azymut(pkt1 geometry,pkt geometry) RETURNS FLOAT LANGUAGE plpgsql AS $$
	DECLARE
	dx FLOAT;
	dy FLOAT;
	azym FLOAT;
   BEGIN
	 dx := ST_X(pkt) - ST_X(pkt1);
	 dy := ST_Y(pkt) - ST_Y(pkt1);

	azym := atan2(dy,dx);
	IF dx > 0 AND dy < 0 THEN RETURN azym  + 200; --2 cwiartka
	elseif dx < 0 AND  dy < 0  THEN RETURN azym  + 400; --
	elseif dx < 0 AND  dy > 0  THEN RETURN azym  + 400; --
	else RETURN azym;
	end if;
   END
   $$ ;