Wrong conversion factors

[jmkeil]

Using a comparison of unit ontologies with ABECTO I became aware that the following units have wrong conversion factors:

• [ ] http://qudt.org/vocab/unit/KiloA: 1.03e-3
• [ ] http://qudt.org/vocab/unit/MegaL: 1e+06
• [ ] http://qudt.org/vocab/unit/MilliM_HG: 86014.2806
• [ ] http://qudt.org/vocab/unit/C_Stat: 3.33564E-10
• [ ] http://qudt.org/vocab/unit/FARAD_Stat: 1.113E-12 (strongly rounded)
• [ ] http://qudt.org/vocab/unit/FT-PDL: 0.042140124
• [ ] http://qudt.org/vocab/unit/TON_FG: 3517 (strongly rounded)
• [ ] http://qudt.org/vocab/unit/HART: 1.0 (to http://qudt.org/vocab/unit/NAT)
• [ ] http://qudt.org/vocab/unit/GigaBYTE: 1073741824 (to http://qudt.org/vocab/unit/NAT)
• [ ] http://qudt.org/vocab/unit/KiloBYTE: 1024 (to http://qudt.org/vocab/unit/NAT)
• [ ] http://qudt.org/vocab/unit/MegaBYTE: 1048576 (to http://qudt.org/vocab/unit/NAT)
• [ ] http://qudt.org/vocab/unit/PebiBYTE: 1125899906842624 (to http://qudt.org/vocab/unit/NAT)
• [ ] http://qudt.org/vocab/unit/PetaBYTE: 1.0e15 (to http://qudt.org/vocab/unit/NAT)
• [ ] http://qudt.org/vocab/unit/TeraBYTE: 1048576 (to http://qudt.org/vocab/unit/NAT)

Regarding the units of information, things might become easier if Bit or Byte would be considered as the reference unit for conversions. Same applies for units derived from the units of information. There is also inconsistent handling of the prefix issue.

Further there might be wrong values at the following units, but I am not able to decide upon without further investigation:

• [ ] http://sweetontology.net/reprSciUnits/year with 3.1556926E7 vs. 3.1536e7 by http://www.ontology-of-units-of-measure.org/resource/om-2/year vs. 31557600 by http://qudt.org/vocab/unit/YR (probably different definitions have been used, but QUDT maps to this OM instance)
• [ ] http://qudt.org/vocab/unit/BTU_MEAN with 1055.05585262 vs. 1.05587e3 by http://www.ontology-of-units-of-measure.org/resource/om-2/BritishThermalUnit-Mean
• [ ] http://qudt.org/vocab/unit/CAL_15_DEG_C with 4.1855e0 vs. 4.18580 by http://www.ontology-of-units-of-measure.org/resource/om-2/calorie-15C
• [ ] http://qudt.org/vocab/unit/CH with 20.1168 vs. 2.011684e1 by http://www.ontology-of-units-of-measure.org/resource/om-2/chain
• [ ] http://sweetontology.net/reprSciUnits/month with 2.629744E6 vs. 2551442.976 by http://qudt.org/vocab/unit/MO (probably different definitions have been used)

[steveraysteveray]

Thanks. Also please see my note on #305

[dr-shorthair]

Corrected values: http://qudt.org/vocab/unit/KiloA: 1000 http://qudt.org/vocab/unit/MegaL: 1000 http://qudt.org/vocab/unit/MilliM_HG: 133.322 http://qudt.org/vocab/unit/C_Stat: 0.00000000033356409519815204957557671447492 http://qudt.org/vocab/unit/FARAD_Stat: 0.000000000001112650056053618432174089964848 http://qudt.org/vocab/unit/FT-PDL: 0.0421401100938048

[dr-shorthair]

http://qudt.org/vocab/unit/TON_FG: 3516.853

[dr-shorthair]

Corrected values:

unit:ExaBYTE 5545177444479562475.3378569716654 unit:ExbiBYTE 6393154322601327829.8943153498712 unit:GibiBYTE 5954088943.6391441429912255610071 unit:GigaBYTE 5954088943.6391441429912255610071 unit:KibiBYTE 5678.2617031470719747459655389854 unit:KiloBYTE 5678.2617031470719747459655389854 unit:MebiBYTE 5814539.984022601702139868711921 unit:MegaBYTE 5814539.984022601702139868711921 unit:PebiBYTE 6243314768165359.2088811673338586 unit:PetaBYTE 5545177444479562.4753378569716654 unit:TebiBYTE 6096987078286.4836024230149744713 unit:TeraBYTE 5545177444479.5624753378569716654

Kilo, Mega and Giga match the 'binary' equivalents Kibi, Mebi and Gibi, but above that they diverge - see https://en.wikipedia.org/wiki/Byte#Multiple-byte_units