>- MIN ((:max_x - :min_x), (:max_y - :min_y)) / :tile_size Thanks for your help! I'm checking JS code. I think it may be openlayers setup issue (vectortilesource tile grid settings). >but optimizable How do you think I can optimize it? -- Sent from: http://postgis.17.x6.nabble.com/PostGIS-User-f3516033.html