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Appendix A: Revision History

14 June 2004

  1. Added the section called “Lambert azimuthal equal area”.

  2. the section called "Polar Stereographic" : Added latitude_of_projection_origin map parameter.

1 July 2004

  1. [scalar-coordinate-variables] : Added note that use of scalar coordinate variables inhibits interoperability with COARDS conforming applications.

  2. [multiple-forecasts-from-single-analysis] : Added positive attribute to the scalar coordinate p500 to make it unambiguous that the pressure is a vertical coordinate value.

20 September 2004

  1. [cell-methods] : Changed several incorrect occurances of the cell method "standard deviation" to "standard_deviation".

22 October 2004

  1. Added [lambert-conformal-projection].

25 November 2005

  1. the section called "Atmosphere hybrid height coordinate" : Fixed definition of atmosphere hybrid height coordinate.

17 January 2008

  1. [preface] : Changed text to refer to rules of CF governance, and provisional status.

  2. [coordinate-types] , [coordinate-system] : Made changes regarding use of the axis attribute to identify horizontal coordinate variables.

  3. Changed document version to 1.1.

4 May 2008

  1. [grid-mappings-and-projections], [appendix-grid-mappings] : Additions and revisions to CF grid mapping attributes to support the specification of coordinate reference system properties (Trac ticket #18).

  2. Table 3.1, "Supported Units" : Corrected Prefix for Factor "1e-2" from "deci" to "centi". (Trac ticket #25).

  3. Changed document version to 1.2.

15 July 2008

  1. [flags] , [attribute-appendix] , [standard-name-modifiers] : Enhanced the Flags definition to support bit field notation using a flag_masks attribute. (Trac ticket #26).

  2. Changed document version to 1.3.

7 November 2008

  1. Fixed defect in wording of [coordinate-system]. (Trac ticket #35).

  2. Fixed defect related to subsection headings in [dimensionless-v-coord]. (Trac ticket #36).

10 December 2008

  1. Changes related to removing ambiguity in [cell-methods]. (Trac ticket #17).

  2. Changed document version to 1.4.

11 December 2008

  1. Added grid mappings Lambert Cylindrical Equal Area, Mercator, and Orthographic to [appendix-grid-mappings]. (Trac ticket #34).

12 December 2008

  1. Fixed defect in Mercator section of [appendix-grid-mappings] by updating to version 12 of Grid Map Names (see http://cf-trac.llnl.gov/trac/wiki/GridMapNames?version=12).

27 February 2009

  1. Fixed defect by clarifying that coordinates indicate gridpoint location in [coordinate-types]. (Trac ticket #44).

  2. Fixed defect of outdated Conventions attribute. (Trac ticket #45).

25 October 2010

Minor revisions requested by Jonathan Gregory. Revisions 33 and 49 were closed after discussions; the rest had elicited no objections.

  1. Ticket 33, cell_methods for statistical indices

  2. Ticket 49, clarification of flag_meanings attribute

  3. Ticket 58, remove deprecation of "missing_value" attribute

  4. Ticket 57, fix for broken URLs in CF Conventions document

  5. Ticket 56, typo in CF conventions doc

  6. Ticket 51, syntax consistency for dimensionless vertical coordinate definitions

  7. Ticket 47, error in example 7.4

  8. Changed document version to 1.5.

  9. New chapter, ticket 37 Changed document version to 1.6.

22 June 2011

Ticket 37. Added Chapter 9, Discrete Sampling Geometries, and a related Appendix H, and revised several other chapters.

5 December 2011

In Appendix H (Annotated Examples of Descrete Geometries), updated standard names "station_description" and "station_wmo_id" to "platform_name" and "platform_id".

23 December 2015

Re-do several changes which had previously been made in an earlier draft of version 1.7:

  1. Ticket 61, two new cell methods in Appendix E.

  2. Ticket 64, section 7.3 editorial correction, replace "cell_bounds" with "bounds".

  3. Ticket 65, add range entry in Appendix E.

  4. Ticket 69. Added Section 5.6.1, Use of the CRS Well-known Text Format and related changes.

  5. Ticket 93, Added two new dimensionless coordinates to Appendix D.

20 January 2016

  1. Ticket 67, remove deprecation of "missing_value" from [attribute-appendix].

  2. Ticket #71, correction of [vertical-perspective] projection.

29 February 2016

  1. Ticket 103 updated Type and Use values for some attributes in [attribute-appendix] and added "special purpose" value. In [appendix-examples-discrete-geometries], updated coordinate values for the variables in some examples to correct omissions.

30 March 2016

  1. Ticket 141, update affiliation organisations for Jonathan Gregory and Phil Bentley.

27 July 2016

  1. Ticket 31, add new attribute actual_range.

2 February 2017

  1. Ticket 76, Added two paragraphs at end of Section 2.6.1 Identication of Conventions to Chapter 2. Added new second line to Section 2.6.1 to Chapter 2

  2. Ticket 138, modified explanation of false_easting and false_northing in Table F1

  3. Ticket 109, dded sentence to introductory part of Section 4.3 beginning with "Optionally". Added "Recommendations" sentence after the paragraph starting with "Optionally" of Section 4.3

  4. Ticket 102, Added sentence to Cell Methods paragraph in Section 7. Added sum_of_squares to the cell methods in Appendix E. Added Randy Horne as an additional author in cf-conventions section