EML Unit dictionary issues

[Matt Jones]

Don,

A while back you reported some issues with EML's unit dictionary.  I am 
going through those now and had a question.  You said that the 
conversion factor for milliGramsPerMilliLiter was wrong.  The current 
dictionary says it should be "1" to convert to kilogramsPerCubicMeter. 
I think that is right.  Here's my conversion calculation...can you check 
it, or tell me what it should be along with the logic behind it?

mg     1kg          1ml    1000000 cm^3      kg
--  x  ---------  x ---- x ------------   =  ----
ml     1000000mg    cm^3    1 m^3            m^3

Because they are ratios, they both scale up at the same rate, and the 
numerator and denominator cancel, leaving a conversion factor of 1.  Am 
I doing something wrong here?

The other one you pointed out I think is wrong in the dictionary.  For 
cubicMicrometerPerGram:

micrometer^3     m^3                     1000g      m^3
------------  x ---------------------  x -----  =   ---
g               (1000000micrometer)^3     kg        kg

So I think this conversion factor should be 10^-15.  That seem right to you?

Thanks a ton for your help.

Matt

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Matt Jones                                     jones at nceas.ucsb.edu
http://www.nceas.ucsb.edu/    Fax: 425-920-2439    Ph: 907-789-0496
National Center for Ecological Analysis and Synthesis (NCEAS)
University of California Santa Barbara
Interested in ecological informatics? http://www.ecoinformatics.org
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