Docs · Spec · GPOS
GPOS — Global Positioning
Global Positioning — geographic and geodetic coordinates over OPC UA. Four structured types (3-D point, 2-D point, ECEF, geodetic), no enums. Depends on RSL.
OPC UA companion specification for geographic and geodetic positioning data — anywhere a server needs to report a point on or near Earth's surface. Common in mobile equipment (cranes, agricultural machines), survey instruments, geographic-asset inventories.
What's in the package
| Artefact | Count |
|---|---|
| Enums | — |
| DTOs | 4 |
| Codecs | 4 |
| Registrars | 1 (GPOSRegistrar) |
Loading
php
examples/gpos/load.php
use PhpOpcua\Client\ClientBuilder;
use PhpOpcua\Nodeset\GPOS\GPOSRegistrar;
$client = ClientBuilder::create()
->loadGeneratedTypes(new GPOSRegistrar()) // pulls RSL
->connect('opc.tcp://gps-asset.local:4840');Direct dependencies
- RSL — Result Standard Library.
Notable types
The four DTOs encode coordinate systems:
_3DGeographicCoordinateDataType— latitude, longitude, height in a geographic CRS_2DGeographicCoordinateDataType— same minus heightEcefCoordinateDataType— Earth-Centered, Earth-Fixed CartesianGeodeticCoordinateDataType— geodetic latitude / longitude
The leading-underscore class names (_3D..., _2D...) reflect
the spec's own naming — PHP class names cannot start with a
digit, the underscore is the workaround.
Last updated · 2026-05-25