Thank you very much.
>I would try >SELECT st_envelope( st_collect(geom) ) FROM roads; >HTH, Filip>> >I want to get the extensions of spatial table. Say that there is a spatial >table named 'roads', and a some road geometry inside. I want to fetch the >bounding box (envelope or extension) for that table, that means for all the >roads that it has.>> >> According the OGC specification, this should be defined in the >> "geometry_columns" table. As four columns, "minX", "minY", "maxX" and >> "maxY". But I couldn't find it anywhere on my postgis. Yet. >> >> From which table/view? With what SQL?
