29 | | ==== Example F.9. Vertical Perspective ==== |

30 | | |

31 | | {{{ |

32 | | grid_mapping_name = vertical_perspective |

33 | | }}} |

34 | | |

35 | | ===== Map parameters: ===== |

36 | | |

37 | | * ''longitude_of_projection_origin'' |

38 | | * ''latitude_of_projection_origin'' |

39 | | * ''perspective_point_height'' |

40 | | * ''false_easting'' |

41 | | * ''false_northing'' |

42 | | |

43 | | ===== Map coordinates: ===== |

44 | | |

45 | | The x (abscissa) and y (ordinate) rectangular coordinates are identified by the ''standard_name'' attribute value ''projection_x_coordinate'' and ''projection_y_coordinate'' respectively. |

46 | | |

47 | | ===== Notes: ===== |

48 | | |

49 | | Notes on using the PROJ.4 software packages for computing the mapping may be found at http://www.remotesensing.org/geotiff/proj_list/geos.html. These notes assume the point of perspective is directly over the equator. A more general description of vertical perspective projection is given in [Snyder], pages 169-181. |

50 | | |

51 | | ==== Example F.10. Mercator ==== |

| 29 | ==== Mercator ==== |

71 | | |

72 | | ~~=== Add the following attributes to Table F.1 ===~~ |

73 | | |

74 | | ~~|| '''Attribute''' || '''Description''' ||~~ |

75 | | ~~|| perspective_point_height || When applicable, records the height, in meters, of the map projection perspective above the ellipsoid (or sphere). Used by perspective-type map projections, for example the Vertical Perspective Projection, which may be used to simulate the view from a Meteosat satellite. ||~~ |

76 | | |

77 | | ~~=== Add the following to the Bibliography ===~~ |

78 | | |

79 | | ~~[Snyder] J Snyder. 1987. "Map Projections -- A Working Manual", USGS Professional Paper 1395.~~ |