EPSG:24100 Jamaica 1875 / Jamaica (Old Grid)
Projected system (Lambert Conic Conformal (1SP)) in use: Jamaica - onshore. The full definition below, and conversion in one click.
EPSG publishes no simple transformation to WGS 84 for this datum: conversion works on the ellipsoid alone and can be off by tens of metres.
| Code | EPSG:24100 |
|---|---|
| Name | Jamaica 1875 / Jamaica (Old Grid) |
| Type | Projected system — Lambert Conic Conformal (1SP) |
| Area of use | Jamaica - onshore |
| Bounds | W -78,43° · S 17,64° · E -76,17° · N 18,58° |
| Countries | Jamaica |
| Datum | Jamaica 1875 |
| Ellipsoid | Clarke 1880 a = 6378249.144808011 m · 1/f = 293.466307656 |
| Base geographic system | EPSG:4241 — Jamaica 1875 |
| Unit | Clarke's foot (E east, N north) |
| Transformation to WGS 84 | No simple transformation published (ellipsoid alone) |
| Scope | Cadastre, engineering survey, topographic mapping (large and medium scale). |
Projection parameters
| Parameter | Value | Unit |
|---|---|---|
| Latitude of natural origin | 18 | degree |
| Longitude of natural origin | -77 | degree |
| Scale factor at natural origin | 1 | unity |
| False easting | 550000 | Clarke's foot |
| False northing | 400000 | Clarke's foot |
proj4 definition
+proj=lcc +lat_1=18 +lat_0=18 +lon_0=-77 +k_0=1 +x_0=167638.49597 +y_0=121918.90616 +a=6378249.14480801 +b=6356514.96620413 +to_meter=0.3047972654 +no_defsPaste it into QGIS, proj4js, PostGIS (spatial_ref_sys) or GDAL. +towgs84 carries the EPSG transformation to WGS 84; the official code stays EPSG:24100.
WKT (ESRI format, the .prj content)
PROJCS["Jamaica_1875_Old_Grid",GEOGCS["GCS_Jamaica_1875",DATUM["D_Jamaica_1875",SPHEROID["Clarke_1880",6378249.14480801,293.466307655636]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Lambert_Conformal_Conic"],PARAMETER["False_Easting",550000.0],PARAMETER["False_Northing",400000.0],PARAMETER["Central_Meridian",-77.0],PARAMETER["Standard_Parallel_1",18.0],PARAMETER["Scale_Factor",1.0],PARAMETER["Latitude_Of_Origin",18.0],UNIT["Clarke's foot",0.3047972654]]Other systems — Jamaica
Source: EPSG registry v11.022 (IOGP), through the PROJ database. Always check a code on epsg.org before contractual work.