Dear All, Following a discussion yesterday in the team behind the proposal, we propose the 'computational_precision` attribute to be optional. Here is the proposed text, which now has a reference to [IEEE Std 754]. Feel free to comment.
Anders **8.3.8 Computational Precision** The accuracy of the reconstituted coordinates will depend on the degree of subsampling, the choice of interpolation method and the choice of the floating-point arithmetic precision with which the interpolation method is applied. To ensure that the results of the coordinate reconstitution process are reproducible and of predictable accuracy, the creator of the compressed dataset may specify the floating-point arithmetic precision by setting the interpolation variable’s `computational_precision` attribute to one of the following values: (table) 32: 32-bit floating-point arithmetic (default), comparable to the binary32 standard in [IEEE_754] 64: 64-bit floating-point arithmetic, comparable to the binary64 standard in [IEEE_754] For the coordinate reconstitution process, the floating-point arithmetic precision should match or exceed the precision specified by `computational_precision` attribute, or match or exceed 32-bit floating-point arithmetic if the `computational_precision` attribute has not been set. **Bibliography** **References** [IEEE_754] "IEEE Standard for Floating-Point Arithmetic," in IEEE Std 754-2019 (Revision of IEEE 754-2008) , vol., no., pp.1-84, 22 July 2019, doi: 10.1109/IEEESTD.2019.8766229. -- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: https://urldefense.us/v3/__https://github.com/cf-convention/cf-conventions/issues/327*issuecomment-863111008__;Iw!!G2kpM7uM-TzIFchu!hEeNCeW3ZDm51VrD-2Me9m0x4OMfhYYcZUZNnJciIwiZkNlfJ709ZkXEkaxKpCvVmt2WhcBFHmI$ This list forwards relevant notifications from Github. It is distinct from cf-metad...@cgd.ucar.edu, although if you do nothing, a subscription to the UCAR list will result in a subscription to this list. To unsubscribe from this list only, send a message to cf-metadata-unsubscribe-requ...@listserv.llnl.gov.
