Please review EML unit dictionary

[Henshaw, Don]

David,
I have reviewed the Andrews unit dictionary.  The following are units of measurement that we have used at the Andrews that I did not find in eml-2.0.0\eml-unitDictionary.xml, as well as a few other notes.  
 
Thanks,
don
 
pressure: hectopascal (=100 pascals)
volume: cubic centimeters
volumetricArea: cubic meters per hectare                
volumetricArea: cubic meters per square meter
massDensity: megagrams per cubic meter
arealMassDensity: grams per square centimeter
arealMassDensity: megagrams per hectare
arealMassDensityRate: grams per square meter per day
amountOfSubstanceWeight: micromoles per gram
amountOfSubstanceWeightFlux: micromoles per gram per day 
amountOfSubstanceWeightFlux: micromoles per gram per hour
amountOfSubstanceWeightFlux: nanomoles per gram per day
amountOfSubstanceWeightFlux: nanomoles per gram per hour
speed: inches per hour (used more as a rate than a speed)
energy?:  megajoule per square meter per day (solar radiation)
energy?:  langley (1 langley=4.187joules per square centimeter, 41870 joules per square meter)
energy?: langleys per day (solar radiation)
conductance?: micro mhos per centimeter
 
I do not think there are unit types for the following (I assigned unit type names):
massPerMassRate: micrograms per gram per day
massPerMassRate: micrograms per gram per hour
massPerMassRate: micrograms per gram per week
massPerMassRate: nanograms per gram per hour
areaPerArea: square meters per hectare
luminanceRate??: micromoles per square meter per second (light measurement from LICOR instrument)
 
Not sure how these fit:
milliequivalents per 100 grams
pH units
ppm (parts per million)
ppb (parts per billion)
 
What about the following use of degrees, minutes, seconds?
degrees azimuth
decimal degrees of latitude or longitude
degrees, minutes, seconds of latitude, longitude
 
On another topic:
Can a julian date be represented in the format string for measurementScale of datetime
i.e., YYYYddd
 
Other notes (being rather picky): pertaining to eml-unitDictionary.xml (2.0.0)
following units seems to show wrong abbreviation and multiplier 
milliGramsPerMilliLiter
cubicMicrometersPerGram
 
The following unit names seem contrary to the convention of showing units in singular form:
squareCentimeters
squareMillimeters
squareKilometers
cubicMeterPerKilogram
 
Not all units show an abbreviation, even when an obvious one exists, ie., kg/ha or g/g
liter shows "L" as the abbreviation
 

-----Original Message-----
From: David Blankman [mailto:dblankman at lternet.edu]
Sent: Monday, February 10, 2003 1:52 PM
To: Iml
Cc: Eml-Dev (E-mail)
Subject: Please review EML unit dictionary


Request of LTER IM's 
Somehow two units that were supposed to have been in the unitDictionary, numberPerMilliliter and numberPerLiter were mistakenly omitted. Prior to releasing a supplement to the unitDictionary and therefore to EML, we would like to see if there are any other units that we missed.

In reviewing the unitDictionary, remember that the unit names in the unitDictionary are often more abstract than the ones that you actually use. For example, one of the units that we are in the process of adding is numberPerMilliliter. The "number" portion is an abstract representation of the unit "cells/milliliter".  A unit like microgramsPerGram is an abstract representation of a class of measurements like: micrograms of carbon per gram of soil. 



-- 

David E. Blankman

Database Integration Developer

Long Term Ecological Research Network Office

University of New Mexico

801 University, SE #104

Albuquerque, NM 87106

(505) 272-7346 / (505) 272-7080 FAX

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