### Instantiate Saba CRS

Source: https://github.com/dvdoug/phpcoord/blob/master/docs/builtin_crs_geographic3d.md

Examples for initializing the Saba coordinate reference system.

```php
Geographic3D::fromSRID(Geographic3D::EPSG_SABA)
Geographic3D::fromSRID('urn:ogc:def:crs:EPSG::10635')
Geographic::fromSRID(Geographic3D::EPSG_SABA)
Geographic::fromSRID('urn:ogc:def:crs:EPSG::10635')
CoordinateReferenceSystem::fromSRID(Geographic3D::EPSG_SABA)
CoordinateReferenceSystem::fromSRID('urn:ogc:def:crs:EPSG::10635')
```

--------------------------------

### Initialize Geographic 3D Systems

Source: https://github.com/dvdoug/phpcoord/blob/master/docs/reflection/coordinateoperation/geographic3d.txt

Examples of initializing Geographic 3D coordinate systems from SRID constants.

```php
Geographic3D::fromSRID(Geographic3D::EPSG_RGNC91_93_LON_LAT)
```

```php
Geographic3D::fromSRID(Geographic3D::EPSG_RGPF)
```

```php
Geographic3D::fromSRID(Geographic3D::EPSG_RGR92)
```

```php
Geographic3D::fromSRID(Geographic3D::EPSG_RGR92_LON_LAT)
```

```php
Geographic3D::fromSRID(Geographic3D::EPSG_RGRDC_2005)
```

```php
Geographic3D::fromSRID(Geographic3D::EPSG_RGSH2020)
```

```php
Geographic3D::fromSRID(Geographic3D::EPSG_RGSPM06)
```

--------------------------------

### Initialize Beduaram CRS

Source: https://github.com/dvdoug/phpcoord/blob/master/docs/reflection/coordinatereferencesystem/geographic2d.txt

Examples for initializing the Beduaram coordinate system for Niger.

```php
Geographic2D::fromSRID(Geographic2D::EPSG_BEDUARAM)
Geographic2D::fromSRID('urn:ogc:def:crs:EPSG::4213')
Geographic::fromSRID(Geographic2D::EPSG_BEDUARAM)
Geographic::fromSRID('urn:ogc:def:crs:EPSG::4213')
CoordinateReferenceSystem::fromSRID(Geographic2D::EPSG_BEDUARAM)
CoordinateReferenceSystem::fromSRID('urn:ogc:def:crs:EPSG::4213')
```

--------------------------------

### Instantiate SRGI2013 CRS

Source: https://github.com/dvdoug/phpcoord/blob/master/docs/builtin_crs_geographic3d.md

Examples for initializing the SRGI2013 coordinate reference system.

```php
Geographic3D::fromSRID(Geographic3D::EPSG_SRGI2013)
Geographic3D::fromSRID('urn:ogc:def:crs:EPSG::9469')
Geographic::fromSRID(Geographic3D::EPSG_SRGI2013)
Geographic::fromSRID('urn:ogc:def:crs:EPSG::9469')
CoordinateReferenceSystem::fromSRID(Geographic3D::EPSG_SRGI2013)
CoordinateReferenceSystem::fromSRID('urn:ogc:def:crs:EPSG::9469')
```

--------------------------------

### Initialize Coordinate Reference Systems

Source: https://github.com/dvdoug/phpcoord/blob/master/docs/reflection/coordinatereferencesystem/geographic2d.txt

Examples of instantiating geographic coordinate systems using SRID constants or URN strings.

```php
Geographic::fromSRID('urn:ogc:def:crs:EPSG::4810')
CoordinateReferenceSystem::fromSRID(Geographic2D::EPSG_TANANARIVE_PARIS)
CoordinateReferenceSystem::fromSRID('urn:ogc:def:crs:EPSG::4810')
```

```php
Geographic2D::fromSRID(Geographic2D::EPSG_TAPI_AIKE)
Geographic2D::fromSRID('urn:ogc:def:crs:EPSG::9248')
Geographic::fromSRID(Geographic2D::EPSG_TAPI_AIKE)
Geographic::fromSRID('urn:ogc:def:crs:EPSG::9248')
CoordinateReferenceSystem::fromSRID(Geographic2D::EPSG_TAPI_AIKE)
CoordinateReferenceSystem::fromSRID('urn:ogc:def:crs:EPSG::9248')
```

```php
Geographic2D::fromSRID(Geographic2D::EPSG_TERN_ISLAND_1961)
Geographic2D::fromSRID('urn:ogc:def:crs:EPSG::4707')
Geographic::fromSRID(Geographic2D::EPSG_TERN_ISLAND_1961)
Geographic::fromSRID('urn:ogc:def:crs:EPSG::4707')
CoordinateReferenceSystem::fromSRID(Geographic2D::EPSG_TERN_ISLAND_1961)
CoordinateReferenceSystem::fromSRID('urn:ogc:def:crs:EPSG::4707')
```

```php
Geographic2D::fromSRID(Geographic2D::EPSG_TETE)
Geographic2D::fromSRID('urn:ogc:def:crs:EPSG::4127')
Geographic::fromSRID(Geographic2D::EPSG_TETE)
Geographic::fromSRID('urn:ogc:def:crs:EPSG::4127')
CoordinateReferenceSystem::fromSRID(Geographic2D::EPSG_TETE)
CoordinateReferenceSystem::fromSRID('urn:ogc:def:crs:EPSG::4127')
```

```php
Geographic2D::fromSRID(Geographic2D::EPSG_TIMBALAI_1948)
Geographic2D::fromSRID('urn:ogc:def:crs:EPSG::4298')
Geographic::fromSRID(Geographic2D::EPSG_TIMBALAI_1948)
Geographic::fromSRID('urn:ogc:def:crs:EPSG::4298')
CoordinateReferenceSystem::fromSRID(Geographic2D::EPSG_TIMBALAI_1948)
CoordinateReferenceSystem::fromSRID('urn:ogc:def:crs:EPSG::4298')
```

```php
Geographic2D::fromSRID(Geographic2D::EPSG_TOKYO)
Geographic2D::fromSRID('urn:ogc:def:crs:EPSG::4301')
Geographic::fromSRID(Geographic2D::EPSG_TOKYO)
Geographic::fromSRID('urn:ogc:def:crs:EPSG::4301')
CoordinateReferenceSystem::fromSRID(Geographic2D::EPSG_TOKYO)
CoordinateReferenceSystem::fromSRID('urn:ogc:def:crs:EPSG::4301')
```

```php
Geographic2D::fromSRID(Geographic2D::EPSG_TOKYO_1892)
Geographic2D::fromSRID('urn:ogc:def:crs:EPSG::5132')
Geographic::fromSRID(Geographic2D::EPSG_TOKYO_1892)
Geographic::fromSRID('urn:ogc:def:crs:EPSG::5132')
CoordinateReferenceSystem::fromSRID(Geographic2D::EPSG_TOKYO_1892)
CoordinateReferenceSystem::fromSRID('urn:ogc:def:crs:EPSG::5132')
```

```php
Geographic2D::fromSRID(Geographic2D::EPSG_TRINIDAD_1903)
Geographic2D::fromSRID('urn:ogc:def:crs:EPSG::4302')
Geographic::fromSRID(Geographic2D::EPSG_TRINIDAD_1903)
Geographic::fromSRID('urn:ogc:def:crs:EPSG::4302')
CoordinateReferenceSystem::fromSRID(Geographic2D::EPSG_TRINIDAD_1903)
CoordinateReferenceSystem::fromSRID('urn:ogc:def:crs:EPSG::4302')
```

```php
Geographic2D::fromSRID(Geographic2D::EPSG_TRISTAN_1968)
Geographic2D::fromSRID('urn:ogc:def:crs:EPSG::4734')
Geographic::fromSRID(Geographic2D::EPSG_TRISTAN_1968)
Geographic::fromSRID('urn:ogc:def:crs:EPSG::4734')
CoordinateReferenceSystem::fromSRID(Geographic2D::EPSG_TRISTAN_1968)
CoordinateReferenceSystem::fromSRID('urn:ogc:def:crs:EPSG::4734')
```

--------------------------------

### Initialize Geographic3D Systems

Source: https://github.com/dvdoug/phpcoord/blob/master/docs/builtin_conversions_geographic3d.md

Examples of initializing various 3D geographic coordinate systems using their respective SRID constants.

```php
Geographic3D::fromSRID(Geographic3D::EPSG_ST_HELENA_TRITAN)
```

```php
Geographic3D::fromSRID(Geographic3D::EPSG_TGD2005)
```

```php
Geographic3D::fromSRID(Geographic3D::EPSG_TUREF)
```

```php
Geographic3D::fromSRID(Geographic3D::EPSG_TWD97)
```

```php
Geographic3D::fromSRID(Geographic3D::EPSG_UCS_2000)
```

--------------------------------

### Instantiate Sint Eustatius CRS

Source: https://github.com/dvdoug/phpcoord/blob/master/docs/builtin_crs_geographic3d.md

Examples for initializing the Sint Eustatius coordinate reference system.

```php
Geographic3D::fromSRID(Geographic3D::EPSG_SINT_EUSTATIUS)
Geographic3D::fromSRID('urn:ogc:def:crs:EPSG::10735')
Geographic::fromSRID(Geographic3D::EPSG_SINT_EUSTATIUS)
Geographic::fromSRID('urn:ogc:def:crs:EPSG::10735')
CoordinateReferenceSystem::fromSRID(Geographic3D::EPSG_SINT_EUSTATIUS)
CoordinateReferenceSystem::fromSRID('urn:ogc:def:crs:EPSG::10735')
```

--------------------------------

### Instantiate SWEREF99 CRS

Source: https://github.com/dvdoug/phpcoord/blob/master/docs/builtin_crs_geographic3d.md

Examples for initializing the SWEREF99 coordinate reference system.

```php
Geographic3D::fromSRID(Geographic3D::EPSG_SWEREF99)
Geographic3D::fromSRID('urn:ogc:def:crs:EPSG::4977')
Geographic::fromSRID(Geographic3D::EPSG_SWEREF99)
Geographic::fromSRID('urn:ogc:def:crs:EPSG::4977')
CoordinateReferenceSystem::fromSRID(Geographic3D::EPSG_SWEREF99)
CoordinateReferenceSystem::fromSRID('urn:ogc:def:crs:EPSG::4977')
```

--------------------------------

### Instantiate TGD2005 CRS

Source: https://github.com/dvdoug/phpcoord/blob/master/docs/builtin_crs_geographic3d.md

Examples for initializing the TGD2005 coordinate reference system.

```php
Geographic3D::fromSRID(Geographic3D::EPSG_TGD2005)
Geographic3D::fromSRID('urn:ogc:def:crs:EPSG::5885')
Geographic::fromSRID(Geographic3D::EPSG_TGD2005)
Geographic::fromSRID('urn:ogc:def:crs:EPSG::5885')
CoordinateReferenceSystem::fromSRID(Geographic3D::EPSG_TGD2005)
CoordinateReferenceSystem::fromSRID('urn:ogc:def:crs:EPSG::5885')
```

--------------------------------

### Initialize Geographic3D Reference Systems

Source: https://github.com/dvdoug/phpcoord/blob/master/docs/reflection/coordinateoperation/geographic3d.txt

Examples of initializing various ETRF Geographic3D reference systems using their SRIDs.

```php
Geographic3D::fromSRID(Geographic3D::EPSG_ETRF2005)
```

```php
Geographic3D::fromSRID(Geographic3D::EPSG_ETRF2014)
```

```php
Geographic3D::fromSRID(Geographic3D::EPSG_ETRF2020)
```

```php
Geographic3D::fromSRID(Geographic3D::EPSG_ETRF89)
```

```php
Geographic3D::fromSRID(Geographic3D::EPSG_ETRF90)
```

```php
Geographic3D::fromSRID(Geographic3D::EPSG_ETRF91)
```

--------------------------------

### Initialize CRS from SRID

Source: https://github.com/dvdoug/phpcoord/blob/master/docs/reflection/coordinatereferencesystem/compound.txt

Example of initializing a coordinate reference system using an OGC URN string.

```php
CoordinateReferenceSystem::fromSRID('urn:ogc:def:crs:EPSG::9520')
```

--------------------------------

### Instantiate TUREF CRS

Source: https://github.com/dvdoug/phpcoord/blob/master/docs/builtin_crs_geographic3d.md

Examples for initializing the TUREF coordinate reference system.

```php
Geographic3D::fromSRID(Geographic3D::EPSG_TUREF)
Geographic3D::fromSRID('urn:ogc:def:crs:EPSG::5251')
Geographic::fromSRID(Geographic3D::EPSG_TUREF)
Geographic::fromSRID('urn:ogc:def:crs:EPSG::5251')
CoordinateReferenceSystem::fromSRID(Geographic3D::EPSG_TUREF)
CoordinateReferenceSystem::fromSRID('urn:ogc:def:crs:EPSG::5251')
```

--------------------------------

### Instantiate TWD97 CRS

Source: https://github.com/dvdoug/phpcoord/blob/master/docs/builtin_crs_geographic3d.md

Examples for initializing the TWD97 coordinate reference system.

```php
Geographic3D::fromSRID(Geographic3D::EPSG_TWD97)
Geographic3D::fromSRID('urn:ogc:def:crs:EPSG::3823')
Geographic::fromSRID(Geographic3D::EPSG_TWD97)
Geographic::fromSRID('urn:ogc:def:crs:EPSG::3823')
CoordinateReferenceSystem::fromSRID(Geographic3D::EPSG_TWD97)
CoordinateReferenceSystem::fromSRID('urn:ogc:def:crs:EPSG::3823')
```

--------------------------------

### Initialize CRS from SRID

Source: https://github.com/dvdoug/phpcoord/blob/master/docs/reflection/coordinatereferencesystem/geocentric.txt

Example of initializing a CoordinateReferenceSystem using a URN string.

```php
CoordinateReferenceSystem::fromSRID('urn:ogc:def:crs:EPSG::4890')
```

--------------------------------

### Initialize RT38 CRS

Source: https://github.com/dvdoug/phpcoord/blob/master/docs/reflection/coordinatereferencesystem/geographic2d.txt

Examples for initializing the RT38 coordinate reference system using EPSG constants or URNs.

```php
Geographic2D::fromSRID(Geographic2D::EPSG_RT38)
Geographic2D::fromSRID('urn:ogc:def:crs:EPSG::4308')
```

--------------------------------

### Initialize Datum from SRID

Source: https://github.com/dvdoug/phpcoord/blob/master/docs/reflection/datum/datum.txt

Use these examples to initialize specific geodetic datums when the datum is unknown or specific to a region.

```php
Datum::fromSRID('urn:ogc:def:datum:EPSG::6054')
```

```php
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_INDONESIAN_NATIONAL_SPHEROID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6021')
```

```php
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_INTERNATIONAL_1924_AUTHALIC_SPHERE)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6053')
```

```php
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_INTERNATIONAL_1924_ELLIPSOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6022')
```

```php
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_KRASSOWSKY_1940_ELLIPSOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6024')
```

```php
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_NWL_9D_ELLIPSOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6025')
```

```php
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_OSU86F_ELLIPSOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6032')
```

```php
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_OSU91A_ELLIPSOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6033')
```

```php
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_PLESSIS_1817_ELLIPSOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6027')
```

```php
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_STRUVE_1860_ELLIPSOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6028')
```

```php
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_WGS_72_ELLIPSOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6043')
```

```php
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_WGS_84_ELLIPSOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6030')
```

```php
Datum::fromSRID(Datum::EPSG_NOT_SPECIFIED_BASED_ON_WAR_OFFICE_ELLIPSOID)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6029')
```

```php
Datum::fromSRID(Datum::EPSG_NOUAKCHOTT_1965)
Datum::fromSRID('urn:ogc:def:datum:EPSG::6680')
```

--------------------------------

### Initialize PZ-90.02 CRS

Source: https://github.com/dvdoug/phpcoord/blob/master/docs/builtin_crs_geographic2d.md

Instantiate the PZ-90.02 reference system.

```php
Geographic2D::fromSRID(Geographic2D::EPSG_PZ_90_02)
Geographic2D::fromSRID('urn:ogc:def:crs:EPSG::9474')
Geographic::fromSRID(Geographic2D::EPSG_PZ_90_02)
Geographic::fromSRID('urn:ogc:def:crs:EPSG::9474')
CoordinateReferenceSystem::fromSRID(Geographic2D::EPSG_PZ_90_02)
CoordinateReferenceSystem::fromSRID('urn:ogc:def:crs:EPSG::9474')
```

--------------------------------

### Compound CRS Examples

Source: https://github.com/dvdoug/phpcoord/blob/master/docs/reflection/coordinatereferencesystem/compound.txt

Examples for creating Compound CRS instances using SRID constants and string representations.

```APIDOC
## Compound CRS Creation

### Description
Demonstrates creating Compound Coordinate Reference Systems using predefined constants and EPSG URNs.

### Method
Static method calls on `Compound` and `CoordinateReferenceSystem` classes.

### Endpoint
N/A (Local library usage)

### Parameters
N/A

### Request Example
```php
// Using EPSG constants for ETRS89 / NTM zone 15 + NN2000 height
Compound::fromSRID(Compound::EPSG_ETRS89_NTM_ZONE_15_PLUS_NN2000_HEIGHT);
CoordinateReferenceSystem::fromSRID(Compound::EPSG_ETRS89_NTM_ZONE_15_PLUS_NN2000_HEIGHT);

// Using URN string for the same CRS
Compound::fromSRID('urn:ogc:def:crs:EPSG::5955');
CoordinateReferenceSystem::fromSRID('urn:ogc:def:crs:EPSG::5955');

// Using EPSG constants for ETRS89 / NTM zone 15 + NN54 height
Compound::fromSRID(Compound::EPSG_ETRS89_NTM_ZONE_15_PLUS_NN54_HEIGHT);
CoordinateReferenceSystem::fromSRID(Compound::EPSG_ETRS89_NTM_ZONE_15_PLUS_NN54_HEIGHT);

// Using URN string for the same CRS
Compound::fromSRID('urn:ogc:def:crs:EPSG::6155');
CoordinateReferenceSystem::fromSRID('urn:ogc:def:crs:EPSG::6155');
```

### Response
N/A (Local library usage, returns CRS objects)

```

--------------------------------

### Polar Bounding Box Examples

Source: https://github.com/dvdoug/phpcoord/blob/master/resources/papers/rfc7946.txt

Examples of bbox representations for regions containing or touching the North and South Poles.

```JSON
"bbox": [-180.0, minlat, 180.0, 90.0]
```

```JSON
"bbox": [-180.0, -90.0, 180.0, maxlat]
```

```JSON
"bbox": [westlon, minlat, eastlon, 90.0]
```

```JSON
"bbox": [westlon, -90.0, eastlon, maxlat]
```

--------------------------------

### GeoJSON Bounding Box Examples

Source: https://github.com/dvdoug/phpcoord/blob/master/resources/papers/rfc7946.txt

Examples of the bbox member applied to Features and FeatureCollections in 2D and 3D coordinate systems.

```JSON
{
    "type": "Feature",
    "bbox": [-10.0, -10.0, 10.0, 10.0],
    "geometry": {
        "type": "Polygon",
        "coordinates": [
            [
                [-10.0, -10.0],
                [10.0, -10.0],
                [10.0, 10.0],
                [-10.0, -10.0]
            ]
        ]
    }
    //...
```

```JSON
{
    "type": "FeatureCollection",
    "bbox": [100.0, 0.0, 105.0, 1.0],
    "features": [
    //...
    ]
}
```

```JSON
{
    "type": "FeatureCollection",
    "bbox": [100.0, 0.0, -100.0, 105.0, 1.0, 0.0],
    "features": [
    //...
    ]
}
```

--------------------------------

### Antimeridian Bounding Box Examples

Source: https://github.com/dvdoug/phpcoord/blob/master/resources/papers/rfc7946.txt

Examples of bbox values for regions spanning the antimeridian, where the northeast longitude is less than the southwest longitude.

```JSON
"bbox": [177.0, -20.0, -178.0, -16.0]
```

```JSON
"bbox": [-178.0, -20.0, 177.0, -16.0]
```

--------------------------------

### Install PHPCoord using Composer

Source: https://context7.com/dvdoug/phpcoord/llms.txt

Install the core PHPCoord package and optional regional datapacks for enhanced accuracy using Composer.

```bash
# Install core package
composer require php-coord/php-coord

# Optional: Install regional datapacks for higher accuracy
composer require php-coord/datapack-europe
composer require php-coord/datapack-northamerica
composer require php-coord/datapack-oceania
```

--------------------------------

### Initialize QND95 CRS

Source: https://github.com/dvdoug/phpcoord/blob/master/docs/builtin_crs_geographic2d.md

Instantiate the QND95 coordinate reference system.

```php
Geographic2D::fromSRID(Geographic2D::EPSG_QND95)
Geographic2D::fromSRID('urn:ogc:def:crs:EPSG::4614')
Geographic::fromSRID(Geographic2D::EPSG_QND95)
Geographic::fromSRID('urn:ogc:def:crs:EPSG::4614')
CoordinateReferenceSystem::fromSRID(Geographic2D::EPSG_QND95)
CoordinateReferenceSystem::fromSRID('urn:ogc:def:crs:EPSG::4614')
```

--------------------------------

### Geocentric to NAD83(CSRS)v7 (Geographic3D) - Example

Source: https://github.com/dvdoug/phpcoord/blob/master/docs/reflection/coordinateoperation/geocentric.txt

Example of transforming coordinates from a geocentric system to NAD83(CSRS)v7 Geographic3D using the `geographicGeocentric` method in PHP.

```php
$point->geographicGeocentric(
    to: Geographic3D::fromSRID(Geographic3D::EPSG_NAD83_CSRS_V7)
)
```

--------------------------------

### NAD83(CSRS)v7 to NAD83(2011) (Geocentric) - Example

Source: https://github.com/dvdoug/phpcoord/blob/master/docs/reflection/coordinateoperation/geocentric.txt

Example of transforming coordinates from NAD83(CSRS)v7 to NAD83(2011) using the `positionVectorTransformation` method in PHP.

```php
$point->positionVectorTransformation(
    to: Geocentric::fromSRID(Geocentric::EPSG_NAD83_2011),
    xAxisTranslation: new Metre(0),
    yAxisTranslation: new Metre(0),
    zAxisTranslation: new Metre(0),
    xAxisRotation: new ArcSecond(0),
    yAxisRotation: new ArcSecond(0),
    zAxisRotation: new ArcSecond(0),
    scaleDifference: new PartsPerBillion(0)
)
```

--------------------------------

### Initialize SIRGAS_ES2007.8

Source: https://github.com/dvdoug/phpcoord/blob/master/docs/builtin_crs_geographic2d.md

Instantiate the SIRGAS_ES2007.8 coordinate reference system.

```php
Geographic2D::fromSRID(Geographic2D::EPSG_SIRGAS_ES2007_8)
Geographic2D::fromSRID('urn:ogc:def:crs:EPSG::5393')
Geographic::fromSRID(Geographic2D::EPSG_SIRGAS_ES2007_8)
Geographic::fromSRID('urn:ogc:def:crs:EPSG::5393')
CoordinateReferenceSystem::fromSRID(Geographic2D::EPSG_SIRGAS_ES2007_8)
CoordinateReferenceSystem::fromSRID('urn:ogc:def:crs:EPSG::5393')
```

--------------------------------

### Initialize PSD93 CRS

Source: https://github.com/dvdoug/phpcoord/blob/master/docs/builtin_crs_geographic2d.md

Instantiate the PSD93 reference system used in Oman.

```php
Geographic2D::fromSRID(Geographic2D::EPSG_PSD93)
Geographic2D::fromSRID('urn:ogc:def:crs:EPSG::4134')
Geographic::fromSRID(Geographic2D::EPSG_PSD93)
Geographic::fromSRID('urn:ogc:def:crs:EPSG::4134')
CoordinateReferenceSystem::fromSRID(Geographic2D::EPSG_PSD93)
CoordinateReferenceSystem::fromSRID('urn:ogc:def:crs:EPSG::4134')
```

--------------------------------

### GeoJSON Feature Object Example

Source: https://github.com/dvdoug/phpcoord/blob/master/resources/papers/rfc7946.txt

An example of a GeoJSON Feature object, illustrating the use of foreign members like 'title'. Foreign members are not subject to GeoJSON semantics.

```json
{
    "type": "Feature",
    "id": "f1",
    "geometry": {...},
    "properties": {...},
    "title": "Example Feature"
}
```

--------------------------------

### ITRF2020 to NAD83(CSRS)v8 (Geocentric) - Time Dependent Example

Source: https://github.com/dvdoug/phpcoord/blob/master/docs/reflection/coordinateoperation/geocentric.txt

Example of performing a time-dependent position vector transformation from ITRF2020 to NAD83(CSRS)v8 (Geocentric) in PHP.

```php
$point->timeDependentPositionVectorTransformation(
    to: Geocentric::fromSRID(Geocentric::EPSG_ITRF2020),
    xAxisTranslation: new Metre(-1.0039),
    yAxisTranslation: new Metre(1.90961),
    zAxisTranslation: new Metre(0.54117),
    xAxisRotation: new ArcSecond(0.02678138),
    yAxisRotation: new ArcSecond(-0.00042027),
    zAxisRotation: new ArcSecond(0.01093206),
    scaleDifference: new PartsPerBillion(0.05109),
    rateOfChangeOfXAxisTranslation: new Rate(new Metre(-0.00079), new Year(1)),
    rateOfChangeOfYAxisTranslation: new Rate(new Metre(0.0007), new Year(1)),
    rateOfChangeOfZAxisTranslation: new Rate(new Metre(0.00124), new Year(1)),
    rateOfChangeOfXAxisRotation: new Rate(new ArcSecond(6.667E-5), new Year(1)),
    rateOfChangeOfYAxisRotation: new Rate(new ArcSecond(-0.00075744), new Year(1)),
    rateOfChangeOfZAxisRotation: new Rate(new ArcSecond(-5.133E-5), new Year(1)),
    rateOfChangeOfScaleDifference: new Rate(new PartsPerBillion(0.07201), new Year(1)),
    parameterReferenceEpoch: new Year(2010)
)
```

--------------------------------

### Initialize Qoornoq 1927 CRS

Source: https://github.com/dvdoug/phpcoord/blob/master/docs/builtin_crs_geographic2d.md

Instantiate the Qoornoq 1927 coordinate reference system.

```php
Geographic2D::fromSRID(Geographic2D::EPSG_QOORNOQ_1927)
Geographic2D::fromSRID('urn:ogc:def:crs:EPSG::4194')
Geographic::fromSRID(Geographic2D::EPSG_QOORNOQ_1927)
Geographic::fromSRID('urn:ogc:def:crs:EPSG::4194')
CoordinateReferenceSystem::fromSRID(Geographic2D::EPSG_QOORNOQ_1927)
CoordinateReferenceSystem::fromSRID('urn:ogc:def:crs:EPSG::4194')
```

--------------------------------

### NAD83(CSRS)v7 to NAD83(CSRS)v8 (Geocentric) - Example

Source: https://github.com/dvdoug/phpcoord/blob/master/docs/reflection/coordinateoperation/geocentric.txt

Example of transforming coordinates from NAD83(CSRS)v7 to NAD83(CSRS)v8 using the `positionVectorTransformation` method in PHP.

```php
$point->positionVectorTransformation(
    to: Geocentric::fromSRID(Geocentric::EPSG_NAD83_CSRS_V8),
    xAxisTranslation: new Metre(0),
    yAxisTranslation: new Metre(0),
    zAxisTranslation: new Metre(0),
    xAxisRotation: new ArcSecond(0),
    yAxisRotation: new ArcSecond(0),
    zAxisRotation: new ArcSecond(0),
    scaleDifference: new PartsPerBillion(0)
)
```

--------------------------------

### Initialize QazTRF-23 CRS

Source: https://github.com/dvdoug/phpcoord/blob/master/docs/builtin_crs_geographic2d.md

Instantiate the QazTRF-23 coordinate reference system.

```php
Geographic2D::fromSRID(Geographic2D::EPSG_QAZTRF_23)
Geographic2D::fromSRID('urn:ogc:def:crs:EPSG::10941')
Geographic::fromSRID(Geographic2D::EPSG_QAZTRF_23)
Geographic::fromSRID('urn:ogc:def:crs:EPSG::10941')
CoordinateReferenceSystem::fromSRID(Geographic2D::EPSG_QAZTRF_23)
CoordinateReferenceSystem::fromSRID('urn:ogc:def:crs:EPSG::10941')
```

--------------------------------

### Instantiate SIRGAS_ES2007.8

Source: https://github.com/dvdoug/phpcoord/blob/master/docs/builtin_datums.md

Use the datum constant or URN to initialize the SIRGAS_ES2007.8 datum.

```php
Datum::fromSRID(Datum::EPSG_SIRGAS_ES2007_8)
Datum::fromSRID('urn:ogc:def:datum:EPSG::1069')
```

--------------------------------

### NAD83(CSRS)v6 to NAD83(CSRS)v7 (Geocentric) - Example

Source: https://github.com/dvdoug/phpcoord/blob/master/docs/reflection/coordinateoperation/geocentric.txt

Example of transforming coordinates from NAD83(CSRS)v6 to NAD83(CSRS)v7 using the `positionVectorTransformation` method in PHP.

```php
$point->positionVectorTransformation(
    to: Geocentric::fromSRID(Geocentric::EPSG_NAD83_CSRS_V6),
    xAxisTranslation: new Metre(-0),
    yAxisTranslation: new Metre(-0),
    zAxisTranslation: new Metre(-0),
    xAxisRotation: new ArcSecond(-0),
    yAxisRotation: new ArcSecond(-0),
    zAxisRotation: new ArcSecond(-0),
    scaleDifference: new PartsPerBillion(-0)
)
```

--------------------------------

### Initialize CoordinateReferenceSystem from EPSG Code (Saba)

Source: https://github.com/dvdoug/phpcoord/blob/master/docs/reflection/coordinatereferencesystem/geographic2d.txt

Use CoordinateReferenceSystem::fromSRID with a specific EPSG code or constant to create a coordinate reference system. This example uses the Saba CRS.

```php
CoordinateReferenceSystem::fromSRID(Geographic2D::EPSG_SABA)
CoordinateReferenceSystem::fromSRID('urn:ogc:def:crs:EPSG::10636')
```

--------------------------------

### Initialize Batavia CRS

Source: https://github.com/dvdoug/phpcoord/blob/master/docs/reflection/coordinatereferencesystem/geographic2d.txt

Examples for initializing the Batavia coordinate system.

```php
Geographic2D::fromSRID(Geographic2D::EPSG_BATAVIA)
Geographic2D::fromSRID('urn:ogc:def:crs:EPSG::4211')
Geographic::fromSRID(Geographic2D::EPSG_BATAVIA)
Geographic::fromSRID('urn:ogc:def:crs:EPSG::4211')
CoordinateReferenceSystem::fromSRID(Geographic2D::EPSG_BATAVIA)
CoordinateReferenceSystem::fromSRID('urn:ogc:def:crs:EPSG::4211')
```

--------------------------------

### Initialize GR96(1996) Coordinate Systems

Source: https://github.com/dvdoug/phpcoord/blob/master/docs/builtin_crs_geocentric.md

Use these methods to initialize the 1996 realization of the GR96 system.

```php
Geocentric::fromSRID(Geocentric::EPSG_GR96_1996)
Geocentric::fromSRID('urn:ogc:def:crs:EPSG::10954')
CoordinateReferenceSystem::fromSRID(Geocentric::EPSG_GR96_1996)
CoordinateReferenceSystem::fromSRID('urn:ogc:def:crs:EPSG::10954')
```

--------------------------------

### GeoJSON MultiLineString Geometry

Source: https://github.com/dvdoug/phpcoord/blob/master/resources/papers/geojson-spec-draft.rst

Example of a GeoJSON MultiLineString geometry object.

```json
{ "type": "MultiLineString",
    "coordinates": [
        [ [100.0, 0.0], [101.0, 1.0] ],
        [ [102.0, 2.0], [103.0, 3.0] ]
      ]
    }
```

--------------------------------

### Initialize NATRF2022 CRS

Source: https://github.com/dvdoug/phpcoord/blob/master/docs/builtin_crs_geocentric.md

Instantiate NATRF2022 reference systems. Note that this data is preliminary and subject to change.

```php
Geocentric::fromSRID(Geocentric::EPSG_NATRF2022)
Geocentric::fromSRID('urn:ogc:def:crs:EPSG::10966')
CoordinateReferenceSystem::fromSRID(Geocentric::EPSG_NATRF2022)
CoordinateReferenceSystem::fromSRID('urn:ogc:def:crs:EPSG::10966')
```

--------------------------------

### GeoJSON MultiPoint Geometry

Source: https://github.com/dvdoug/phpcoord/blob/master/resources/papers/geojson-spec-draft.rst

Example of a GeoJSON MultiPoint geometry object.

```json
{ "type": "MultiPoint",
    "coordinates": [ [100.0, 0.0], [101.0, 1.0] ]
    }
```

--------------------------------

### GeoJSON LineString Geometry

Source: https://github.com/dvdoug/phpcoord/blob/master/resources/papers/geojson-spec-draft.rst

Example of a GeoJSON LineString geometry object.

```json
{ "type": "LineString",
    "coordinates": [ [100.0, 0.0], [101.0, 1.0] ]
    }
```

--------------------------------

### GeoJSON Point Geometry

Source: https://github.com/dvdoug/phpcoord/blob/master/resources/papers/geojson-spec-draft.rst

Example of a GeoJSON Point geometry object.

```json
{ "type": "Point", "coordinates": [100.0, 0.0] }
```

--------------------------------

### Initialize CRS by SRID

Source: https://github.com/dvdoug/phpcoord/blob/master/docs/reflection/coordinatereferencesystem/geographic3d.txt

Demonstrates instantiation of CRS objects using either predefined class constants or OGC URN strings.

```php
Geographic::fromSRID('urn:ogc:def:crs:EPSG::7682')
CoordinateReferenceSystem::fromSRID(Geographic3D::EPSG_GSK_2011)
CoordinateReferenceSystem::fromSRID('urn:ogc:def:crs:EPSG::7682')
```

```php
Geographic3D::fromSRID(Geographic3D::EPSG_GEORGIA_GEODETIC_DATUM)
Geographic3D::fromSRID('urn:ogc:def:crs:EPSG::10830')
Geographic::fromSRID(Geographic3D::EPSG_GEORGIA_GEODETIC_DATUM)
Geographic::fromSRID('urn:ogc:def:crs:EPSG::10830')
CoordinateReferenceSystem::fromSRID(Geographic3D::EPSG_GEORGIA_GEODETIC_DATUM)
CoordinateReferenceSystem::fromSRID('urn:ogc:def:crs:EPSG::10830')
```

```php
Geographic3D::fromSRID(Geographic3D::EPSG_HTRS96)
Geographic3D::fromSRID('urn:ogc:def:crs:EPSG::4889')
Geographic::fromSRID(Geographic3D::EPSG_HTRS96)
Geographic::fromSRID('urn:ogc:def:crs:EPSG::4889')
CoordinateReferenceSystem::fromSRID(Geographic3D::EPSG_HTRS96)
CoordinateReferenceSystem::fromSRID('urn:ogc:def:crs:EPSG::4889')
```

```php
Geographic3D::fromSRID(Geographic3D::EPSG_HARTEBEESTHOEK94)
Geographic3D::fromSRID('urn:ogc:def:crs:EPSG::4941')
Geographic::fromSRID(Geographic3D::EPSG_HARTEBEESTHOEK94)
Geographic::fromSRID('urn:ogc:def:crs:EPSG::4941')
CoordinateReferenceSystem::fromSRID(Geographic3D::EPSG_HARTEBEESTHOEK94)
CoordinateReferenceSystem::fromSRID('urn:ogc:def:crs:EPSG::4941')
```

```php
Geographic3D::fromSRID(Geographic3D::EPSG_HONG_KONG_GEODETIC_CS)
Geographic3D::fromSRID('urn:ogc:def:crs:EPSG::8426')
Geographic::fromSRID(Geographic3D::EPSG_HONG_KONG_GEODETIC_CS)
Geographic::fromSRID('urn:ogc:def:crs:EPSG::8426')
CoordinateReferenceSystem::fromSRID(Geographic3D::EPSG_HONG_KONG_GEODETIC_CS)
CoordinateReferenceSystem::fromSRID('urn:ogc:def:crs:EPSG::8426')
```

```php
Geographic3D::fromSRID(Geographic3D::EPSG_IG05_INTERMEDIATE_CRS)
Geographic3D::fromSRID('urn:ogc:def:crs:EPSG::6982')
Geographic::fromSRID(Geographic3D::EPSG_IG05_INTERMEDIATE_CRS)
Geographic::fromSRID('urn:ogc:def:crs:EPSG::6982')
CoordinateReferenceSystem::fromSRID(Geographic3D::EPSG_IG05_INTERMEDIATE_CRS)
CoordinateReferenceSystem::fromSRID('urn:ogc:def:crs:EPSG::6982')
```

```php
Geographic3D::fromSRID(Geographic3D::EPSG_IG05_12_INTERMEDIATE_CRS)
Geographic3D::fromSRID('urn:ogc:def:crs:EPSG::6989')
Geographic::fromSRID(Geographic3D::EPSG_IG05_12_INTERMEDIATE_CRS)
Geographic::fromSRID('urn:ogc:def:crs:EPSG::6989')
CoordinateReferenceSystem::fromSRID(Geographic3D::EPSG_IG05_12_INTERMEDIATE_CRS)
CoordinateReferenceSystem::fromSRID('urn:ogc:def:crs:EPSG::6989')
```

```php
Geographic3D::fromSRID(Geographic3D::EPSG_IGD05)
Geographic3D::fromSRID('urn:ogc:def:crs:EPSG::7135')
Geographic::fromSRID(Geographic3D::EPSG_IGD05)
Geographic::fromSRID('urn:ogc:def:crs:EPSG::7135')
CoordinateReferenceSystem::fromSRID(Geographic3D::EPSG_IGD05)
CoordinateReferenceSystem::fromSRID('urn:ogc:def:crs:EPSG::7135')
```

```php
Geographic3D::fromSRID(Geographic3D::EPSG_IGD05_12)
Geographic3D::fromSRID('urn:ogc:def:crs:EPSG::7138')
Geographic::fromSRID(Geographic3D::EPSG_IGD05_12)
Geographic::fromSRID('urn:ogc:def:crs:EPSG::7138')
CoordinateReferenceSystem::fromSRID(Geographic3D::EPSG_IGD05_12)
CoordinateReferenceSystem::fromSRID('urn:ogc:def:crs:EPSG::7138')
```

```php
Geographic3D::fromSRID(Geographic3D::EPSG_IGM95)
Geographic3D::fromSRID('urn:ogc:def:crs:EPSG::4983')
Geographic::fromSRID(Geographic3D::EPSG_IGM95)
Geographic::fromSRID('urn:ogc:def:crs:EPSG::4983')
CoordinateReferenceSystem::fromSRID(Geographic3D::EPSG_IGM95)
CoordinateReferenceSystem::fromSRID('urn:ogc:def:crs:EPSG::4983')
```

```php
Geographic3D::fromSRID(Geographic3D::EPSG_IGRS)
Geographic3D::fromSRID('urn:ogc:def:crs:EPSG::3888')
Geographic::fromSRID(Geographic3D::EPSG_IGRS)
```

--------------------------------

### Example: Register Custom Geographic2D CRS - PHPCoord

Source: https://github.com/dvdoug/phpcoord/blob/master/docs/custom_coordinate_reference_systems.md

This example demonstrates how to register a custom Geographic2D Coordinate Reference System (CRS) with a specific SRID, name, coordinate system, datum, and bounding area. Ensure all required classes like BoundingArea, Geographic2D, Ellipsoidal, and Datum are properly imported.

```php
<?php
namespace YourApp\Geo;
use PHPCoord\CoordinateSystem\Geographic;
use PHPCoord\CoordinateReferenceSystem\Geographic2D;
use PHPCoord\Datum\Datum;
use PHPCoord\Geometry\BoundingArea;
use PHPCoord\Geometry\RegionMap;

$boundingArea = BoundingArea::createFromArray(
    [
        [
            [
                [93.41, -60.55], [93.41, -8.47], [173.34, -8.47], [173.34, -60.55], [93.41, -60.55]
            ]
        ]
    ]
    RegionMap::REGION_OCEANIA
);

Geographic2D::registerCustomCRS(
    'urn:yourcompany:geo:crs:GDA2020-lon-lat',
    'GDA2020 (in lon-lat order)',
    Ellipsoidal::fromSRID(
        Ellipsoidal::EPSG_2D_AXES_LONGITUDE_LATITUDE_ORIENTATIONS_EAST_NORTH_UOM_DEGREE
    ),
    Datum::fromSRID(
        Datum::EPSG_GEOCENTRIC_DATUM_OF_AUSTRALIA_2020
    ),
    $boundingArea
);
```

--------------------------------

### IGb08 to IGS08 Transformation

Source: https://github.com/dvdoug/phpcoord/blob/master/docs/reflection/coordinateoperation/geocentric.txt

Example of transforming a point from IGb08 to IGS08 (Geocentric).

```APIDOC
## POST /api/transformations/igb08-to-igs08

### Description
Transforms a point from the IGb08 geocentric coordinate system to the IGS08 geocentric coordinate system.

### Method
POST

### Endpoint
/api/transformations/igb08-to-igs08

### Parameters
#### Query Parameters
- **operation** (string) - Optional - Specifies the transformation operation, e.g., "urn:ogc:def:coordinateOperation:EPSG::9037".

#### Request Body
- **to** (Geocentric) - Required - The target geocentric coordinate system (e.g., Geocentric::fromSRID(Geocentric::EPSG_IGS08)).
- **xAxisTranslation** (Millimetre) - Required - Translation along the X-axis.
- **yAxisTranslation** (Millimetre) - Required - Translation along the Y-axis.
- **zAxisTranslation** (Millimetre) - Required - Translation along the Z-axis.
- **xAxisRotation** (ArcSecond) - Required - Rotation around the X-axis.
- **yAxisRotation** (ArcSecond) - Required - Rotation around the Y-axis.
- **zAxisRotation** (ArcSecond) - Required - Rotation around the Z-axis.
- **scaleDifference** (PartsPerBillion) - Required - Difference in scale.
- **transformationReferenceEpoch** (Year) - Required - The reference epoch for the transformation.

### Request Example
```json
{
  "to": "Geocentric::fromSRID(Geocentric::EPSG_IGS08)",
  "xAxisTranslation": {"value": 0, "unit": "Millimetre"},
  "yAxisTranslation": {"value": 0, "unit": "Millimetre"},
  "zAxisTranslation": {"value": 0, "unit": "Millimetre"},
  "xAxisRotation": {"value": 0, "unit": "ArcSecond"},
  "yAxisRotation": {"value": 0, "unit": "ArcSecond"},
  "zAxisRotation": {"value": 0, "unit": "ArcSecond"},
  "scaleDifference": {"value": 0, "unit": "PartsPerBillion"},
  "transformationReferenceEpoch": {"year": 2005}
}
```

### Response
#### Success Response (200)
- **transformedPoint** (Point) - The transformed point object.

#### Response Example
```json
{
  "transformedPoint": {
    "x": 123456.78,
    "y": 234567.89,
    "z": 345678.90
  }
}
```
```