Vielleicht hilft dir das hier:
--- EPSG 4075 : SREF98
---
INSERT INTO "spatial_ref_sys" ("srid","auth_name","auth_srid","srtext","proj4text") VALUES (4075,'EPSG',4075,'GEOGCS["SREF98",DATUM["Serbian_Reference_Network_1998",SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],TOWGS84[0,0,0,0,0,0,0],AUTHORITY["EPSG","1034"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.01745329251994328,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4075"]]','+proj=longlat +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +no_defs ');
---
# SREF98
<4075> +proj=longlat +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +no_defs <>
4073,SREF98,3534,geocentric,6500,1034,,,,,Geodesy.,,"Delcev et al, FIG Working Week May 2009; http://www.gig.net/pub",OGP,2009/05/11,2009.015,1,0
4074,SREF98,3534,geographic 3D,6423,1034,4073,15592,,,Geodesy.,,"Delcev et al, FIG Working Week May 2009; http://www.gig.net/pub",OGP,2009/05/11,2009.015,1,0
4075,SREF98,3534,geographic 2D,6422,1034,4074,15593,,,Horizontal component of 3D system.,Replaces MGI 1901 (CRS code 3906) in Serbia.,OGP. See 3D CRS for original information source.,OGP,2009/05/11,2009.015,1,0
EDIT: Demnach müsste EPSG 4075 die gleichen Parameter haben wie 3824 und 3889.
gruß,
ajoessen