Cấu hình Postgis cho chuyển đổi VN2000

* Cập nhật theo VN2000 tọa độ quốc gia
UPDATE public.spatial_ref_sys
   SET srtext='PROJCS["VN_2000_UTM_Zone_48N",GEOGCS["GCS_VN_2000",DATUM["D_Vietnam_2000",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",500000.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",105.0],PARAMETER["Scale_Factor",0.9996],PARAMETER["Latitude_Of_Origin",0.0],UNIT["Meter",1.0]]', proj4text='+proj=utm +zone=48 +ellps=WGS84 +towgs84=-192.873,-39.382,-111.202,-0.00205,-0.0005,0.00335,0.0188 +units=m +no_defs'
WHERE srid=3405;

*Cập nhật theo VN2000 tọa độ TP HCM
INSERT INTO public.spatial_ref_sys(
            srid, auth_name, auth_srid, srtext, proj4text)
    VALUES (300001, 'EPSG', 300001, 'PROJCS["VN2000_HCM",GEOGCS["GCS_VN_2000",DATUM["D_Vietnam_2000",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",500000.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",105.75],PARAMETER["Scale_Factor",0.9999],PARAMETER["Latitude_Of_Origin",0.0],UNIT["Meter",1.0]]', '+proj=tmerc +lat_0=0 +lon_0=105.75 +k=0.9999 +x_0=500000 +y_0=0 +ellps=WGS84 +towgs84=-192.873,-39.382,-111.202,-0.00205,-0.0005,0.00335,0.0188 +units=m +no_defs');