# Supported map projections

Use map projections that are supported by Db2® Spatial Extender.

```
with pos(id,proj) as (select organization_coordsys_id, posstr(definition, 'PROJECTION') from
db2gse.st_coordinate_systems) select distinct substr(definition, proj, 46) from
db2gse.st_coordinate_systems cs, pos where cs.organization_coordsys_id = pos.id and pos.proj > 0
```

Cylindrical projections | Pseudocylindrical projections |
---|---|

Behrmann |
Craster parabolic |

Cassini |
Eckert I |

Cylindrical equal area |
Eckert II |

Gall's stereographic |
Eckert III |

Gauss-Kruger |
Eckert IV |

Mercator |
Eckert V |

Miller cylindrical |
Eckert VI |

Plate-Carée |
Mercator (Hotine) Mollweide |

Times |
Robinson |

Transverse Mercator |
Sinusoidal (Sansom-Flamsteed) |

Winkel I |

Conic projection | Conic projection |
---|---|

Albers conic equal-area |
Polyconic |

Bipolar oblique conformal conic |
Two-point equidistant |

Bonne |
Hammer-Aitoff equal-area |

Equidistant conic |
Van der Grinten I |

Lambert conformal conic |

Parameter | Description |
---|---|

central_meridian |
The line of longitude chosen as the origin of x-coordinates. |

scale_factor |
Scale_factor is used generally to reduce the amount of distortion in a map projection. |

standard_parallel_1 |
A line of latitude that has no distortion generally. Also used for |

standard_parallel_2 |
A line of longitude that has no distortion generally. |

longitude_of_center |
The longitude that defines the center point of the map projection. |

latitude_of_center |
The latitude that defines the center point of the map projection. |

longitude_of_origin |
The longitude chosen as the origin of x-coordinates. |

latitude_of_origin |
The latitude chosen as the origin of y-coordinates. |

false_easting |
A value added to x-coordinates so that all x-coordinate values are positive. |

false_northing |
A value added to y-coordinates so that all y-coordinates are positive. |

azimuth |
The angle east of north that defines the center line of an oblique projection. |

longitude_of_point_1 |
The longitude of the first point needed for a map projection. |

latitude_of_point_1 |
The latitude of the first point needed for a map projection. |

longitude_of_point_2 |
The longitude of the second point needed for a map projection. |

latitude_of_point_2 |
The latitude of the second point needed for a map projection. |

longitude_of_point_3 |
The longitude of the third point needed for a map projection. |

latitude_of_point_3 |
The latitude of the third point needed for a map projection. |

landsat_number |
The number of a Landsat satellite. |

path_number |
The orbital path number for a particular satellite. |

perspective_point_height |
The height above the earth of the perspective point of the map projection. |

fipszone |
State Plane Coordinate System zone number. |

zone |
UTM zone number. |