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From "Martin Desruisseaux (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SIS-378) Too aggressive simplification of some units of measurement
Date Sun, 03 Dec 2017 14:00:00 GMT
Martin Desruisseaux created SIS-378:
---------------------------------------

             Summary: Too aggressive simplification of some units of measurement
                 Key: SIS-378
                 URL: https://issues.apache.org/jira/browse/SIS-378
             Project: Spatial Information Systems
          Issue Type: Bug
          Components: Utilities
    Affects Versions: 0.8
            Reporter: Martin Desruisseaux


In the left column, some units used by the World Meteorological Organisation (WMO). In the
right column, the result of parsing with Apache SIS. Some simplifications are too aggressive,
in particular with dimensionless units like radians.

|| WMO units       || After SIS parsing || Ok ||
|   K m2 kg-1 s-1  |       K⋅m²∕(kg⋅s)  |  (/) |
|        m m6 m-3  |                m⁴  |  (!) |
|          Pa s-1  |         kg∕(m⋅s³)  |  (!) |
|           S m-1  |     A²⋅s³∕(kg⋅m³)  |  (!) |
|   kg kg-1 m s-1  |               m∕s  |  (!) |
|        m2/3 s-1  |  0.3333333333333333⋅m²∕s  |  (x) |
|          J kg-1  |             m²∕s²  |  (!) |
|       mol mol-1  |                    |  (!) |
|         mol s-1  |             mol∕s  |  (/) |
|           K s-1  |               K∕s  |  (/) |
|           m s-1  |               m∕s  |  (/) |
|           m s-2  |              m∕s²  |  (/) |
|            Pa m  |             kg∕s²  |  (!) |
|          m3 s-1  |              m³∕s  |  (/) |
|      kg m-2 s-1  |         kg∕(m²⋅s)  |  (/) |
|          μg m-3  |      1.0E-9⋅kg∕m³  |  (!) |
|           K m-1  |               K∕m  |  (/) |
|           W m-2  |             kg∕s³  |  (!) |
|           N m-2  |                Pa  |  (?) |
|     (m2 s sr)-1  |           -1⋅m²⋅s  |  (x) |
|          kg m-2  |             kg∕m²  |  (/) |
|          kg m-3  |             kg∕m³  |  (/) |
|         K*m s-1  |             K⋅m∕s  |  (/) |
|          cm/day  |  1.1574074074074074E-7⋅m∕s  |  (!) |
|     m-2 s rad-1  |              s∕m²  |  (x) |
|         N m-2 s  |          kg∕(m⋅s)  |  (!) |
|     kg kg-1 s-1  |                Hz  |  (x) |
|     kg/kg*kg/kg  |                    |  (!) |
|           K*m/s  |             K⋅m∕s  |  (/) |
|      kg/kg*Pa/s  |         kg∕(m⋅s³)  |  (!) |
|       kg/kg*m/s  |               m∕s  |  (!) |
|             day  |                 d  |  (/) |
|          µg m-3  |      1.0E-9⋅kg∕m³  |  (!) |
|           Pa*Pa  |       kg²∕(m²⋅s⁴)  |  (!) |
|      W m-2 Hz-1  |             kg∕s²  |  (!) |
|      W sr-1 m-2  |             kg∕s³  |  (x) |
|           N m-1  |             kg∕s²  |  (!) |
|      W m-1 sr-1  |           kg⋅m∕s³  |  (x) |
|         m-2 s-1  |           ∕(m²⋅s)  |  (!) |
|               °  |                 °  |  (/) |
|         kg kg-1  |                    |  (!) |
|           s m-1  |               s∕m  |  (/) |
|      W m-3 sr-1  |         kg∕(m⋅s³)  |  (x) |
|          K*Pa/s  |       K⋅kg∕(m⋅s³)  |  (!) |
|          m3 m-3  |                    |  (!) |
|           V m-1  |       kg⋅m∕(s³⋅A)  |  (!) |
|          m2 s-2  |             m²∕s²  |  (/) |
|          m2 s-1  |              m²∕s  |  (/) |
|         mol m-3  |            mol∕m³  |  (/) |
|             psu  |               psu  |  (/) |
|           J m-2  |             kg∕s²  |  (!) |
|        kg-2 s-1  |          ∕(kg²⋅s)  |  (!) |
|             K*K  |                K²  |  (/) |
|      kg m-3 s-1  |         kg∕(m³⋅s)  |  (/) |
|      m3 s-1 m-1  |              m²∕s  |  (!) |
|(kg m-3) (m s-1)  |         kg∕(m²⋅s)  |  (!) |
|      W m-2 nm-1  |  9.999999999999999E8⋅kg∕(m⋅s³)  |  (!) |




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