Description of CRS - PT_DLX(HAY) / TM_DLX| Attribute | Entry |
|---|
| Country | Portugal |
| Country identifier | PT |
| CRS identifier | PT_DLX(HAY) / TM_DLX |
| CRS alias | HG DLX |
| CRS valid area | Portugal, core Portugal |
| CRS scope | |
| CRS remarks |
|
| Datum identifier | DLX(HAY) |
| Datum alias |
|
| Datum type | geodetic |
| Datum anchor point | Castelo de S. Jorge, Lisbon |
| Datum realization epoch | 1890 |
| Datum valid area | Portugal, core Portugal |
| Datum scope | support of cartographic activities |
| Datum remarks | Consult "Cartografia Matematica" and "Sistemas
Geo-Cartograficos em uso
no I.G.C." |
| Prime meridian identifier | Greenwich |
| Prime meridian greenwich longitude | 0° |
| Prime meridian remarks | also Prime Meridian 1° E of Prime Meridian Lisbon for
ellipsoidal and cartesian coordinates in use
(Prime Meridian Lisbon = 9°07'54.862" W wrt Greenwich,
1° E of Prime Meridian Lisbon = 8°07'54.862" W wrt
Greenwich) |
| Ellipsoid identifier | Hayford 1909 |
| Ellipsoid alias | International 1924 |
| Ellipsoid semi major axis | 6 378 388 m |
| Ellipsoid shape | true |
| Ellipsoid inverse flattening | 297 |
| Ellipsoid remarks | |
| Coordinate system identifier | TM_DLX |
| Coordinate system type | projected |
| Coordinate system dimension | 2 |
| Coordinate system remarks | |
| Coordinate system axis name | P / northing / X |
| Coordinate system axis direction | North |
| Coordinate system axis unit identifier | metre |
| Coordinate system axis name | M / easting / Y |
| Coordinate system axis direction | East |
| Coordinate system axis unit identifier | metre |
| Operation identifier | TM_DLX |
| Operation valid area | Portugal, core Portugal |
| Operation scope | |
| Operation method name | Transverse Mercator Projection |
| Operation method name alias | Gauß Krüger Projection |
| Operation method formula | Transverse Mercator Mapping Equations, in Hooijberg,
Practical Geodesy, 1997, pages 81-84
- or -
Triangulacao Fundamental, Lisboa 1937 |
| Operation method parameters number | 5 |
| Operation method remarks |
|
| Operation parameter name | latitude of origin |
| Operation parameter value | 39°40' N |
| Operation parameter remarks | |
| Operation parameter name | longitude of origin |
| Operation parameter value | 8°07'54.862" W wrt Greenwich |
| Operation parameter remarks | |
| Operation parameter name | false northing |
| Operation parameter value | 0 m |
| Operation parameter remarks | |
| Operation parameter name | false easting |
| Operation parameter value | 0 m |
| Operation parameter remarks | |
| Operation parameter name | scale factor at central meridian |
| Operation parameter value | 1.0000 |
| Operation parameter remarks | |