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This recommendation expands on the DIWG-R12 Include Datum Attributes for Data in Grid Structures.
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titleRecommendation: DIWG-R18

We recommend that Earth Science dataset granules be produced with complete georeferencing information for all their geospatial coordinates. This georeference information should be encoded in an interoperable way based on the CF convention and the following specific guidelines:

  • Granules are required to contain the most applicable type of geospatial coordinates for the expected application of their data. The decision whether to provide any additional type of geospatial coordinates is left to the data producer.

  • The georeference information should be given as both CF grid mapping variable attributes and OGC Well-Known Text (WKT), whenever possible. In all other cases the georeference information should be given in either of the two formats that supports it.
  • The preference when processing georeference information should be given to the WKT content if available.

Following the above directions will support the widest range of software tools and at the same time control the file size by avoiding storage of redundant geospatial coordinate data.

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