I'm new to postgis, and have data in NZMG (New Zealand Map Grid) - not the newer NZGD2000, as well as lat/long coords using spheroid WGS84 (like GPS data). I have used proj to convert between these in the past, so assume I can in PostGIS. Can someone let me know what the srid values are for these, or how to find out? Thanks, Brent Wood