EPSG systems

EPSG:4726 SIGD61

Geographic system in latitude and longitude, in use: Cayman Islands - Little Cayman and Cayman Brac. Datum, ellipsoid and transformation to WGS 84 below.

System record
CodeEPSG:4726
NameSIGD61
TypeGeographic system
Area of use Cayman Islands - Little Cayman and Cayman Brac
Bounds W -80,14° · S 19,63° · E -79,69° · N 19,78°
Countries Cayman Islands
DatumSister Islands Geodetic Datum 1961
Ellipsoid Clarke 1866 a = 6378206.4 m · 1/f = 294.978698214
Unit degree (Lat north, Lon east)
Transformation to WGS 84 SIGD61 to WGS 84 (3) (EPSG:6143) — accuracy 1 m
ScopeCadastre, engineering survey, topographic mapping.

proj4 definition

+proj=longlat +ellps=clrk66 +towgs84=8.853,-52.644,180.304,-0.393,-2.323,2.96,-24.081 +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:4726.

WKT (ESRI format, the .prj content)

GEOGCS["GCS_Little_Cayman_1961",DATUM["D_Little_Cayman_1961",SPHEROID["Clarke_1866",6378206.4,294.978698213898]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]]

All systems — Cayman Islands

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