var
Step:integer;
shiftx,shifty:integer;
y:integer;
begin
shiftx:=225280;
shifty:=5632000;

step:=round(225280/round(intpower(2,getz-3)))
if gety<3 then step:=225280;

y:=round(intpower(2,getz-1))-GetY-1;
if y<=0 then y:=1;

ResultURL:=GetURLBase+inttostr(shiftx+getx*step)+','+inttostr(shifty+Y*step)+','+inttostr(shiftx+getx*step+step)+','+inttostr(shifty+Y*step+step);
end.