EPSG:3993 Guam 1963 / Guam SPCS
Projected system (Guam Projection) in use: Guam - onshore. The full definition below, and conversion in one click.
| Code | EPSG:3993 |
|---|---|
| Name | Guam 1963 / Guam SPCS |
| Type | Projected system — Guam Projection |
| Area of use | Guam - onshore |
| Bounds | W 144,58° · S 13,18° · E 145,01° · N 13,70° |
| Countries | Guam |
| Datum | Guam 1963 |
| Ellipsoid | Clarke 1866 a = 6378206.4 m · 1/f = 294.978698214 |
| Base geographic system | EPSG:4675 — Guam 1963 |
| Unit | metre (X east, Y north) |
| Transformation to WGS 84 | Guam 1963 to WGS 84 (1) (EPSG:1070) — accuracy 6 m |
| Scope | Cadastre, engineering survey, topographic mapping (large and medium scale). |
Projection parameters
| Parameter | Value | Unit |
|---|---|---|
| Latitude of natural origin | 13.472466352777777 | degree |
| Longitude of natural origin | 144.74875070555555 | degree |
| False easting | 50000 | metre |
| False northing | 50000 | metre |
proj4 definition
+proj=aeqd +guam +lat_0=13.4724663527778 +lon_0=144.748750705556 +x_0=50000 +y_0=50000 +ellps=clrk66 +units=m +towgs84=-100,-248,259 +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:3993.
Other systems — Guam
Source: EPSG registry v11.022 (IOGP), through the PROJ database. Always check a code on epsg.org before contractual work.