EPSG systems

EPSG:3819 HD1909

Geographic system in latitude and longitude, in use: Hungary. Datum, ellipsoid and transformation to WGS 84 below.

System record
CodeEPSG:3819
NameHD1909
TypeGeographic system
Area of use Hungary
Bounds W 16,11° · S 45,74° · E 22,90° · N 48,58°
Countries Hungary
DatumHungarian Datum 1909
Ellipsoid Bessel 1841 a = 6377397.155 m · 1/f = 299.1528128
Unit degree (Lat north, Lon east)
Transformation to WGS 84 HD1909 to WGS 84 (1) (EPSG:3817) — accuracy 3 m
ScopeGeodesy.

proj4 definition

+proj=longlat +ellps=bessel +towgs84=595.48,121.69,515.35,4.115,-2.9383,0.853,-3.408 +no_defs

Paste it into QGIS, proj4js, PostGIS (spatial_ref_sys) or GDAL. +towgs84 carries the EPSG transformation to WGS 84; the official code stays EPSG:3819.

WKT (ESRI format, the .prj content)

GEOGCS["GCS_HD1909",DATUM["D_Hungarian_Datum_1909",SPHEROID["Bessel_1841",6377397.155,299.1528128]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]]

All systems — Hungary

Source: EPSG registry v11.022 (IOGP), through the PROJ database. Always check a code on epsg.org before contractual work.