mbjones
commented
7 years ago Original Redmine Comment Author Name: Matt Jones (Matt Jones) Original Date: 2003-03-21T16:28:18Z
Scott Chapal submitted the following units as candidates as well: ---- Message from Scott Chapal ------ Working with our climate data, I found the need for:
kiloPascal wattsPerMeterSquared kiloJoulePerMeterSquared Fuel Moisture % - percentWaterContentByWeight ??
Relative Humidity is presumably unitless? ---- End message -----
mobb
Author Name: Matt Jones (Matt Jones) Original Redmine Issue: 1000, https://projects.ecoinformatics.org/ecoinfo/issues/1000 Original Date: 2003-02-21 Original Assignee: Matt Jones
The following exellent email from Don Henshaw addresses a large number of missing or problematic units in the unit dictionary. We need to 1) fix these and others that are identified, and 2) figure out how to release new versions of the eml-unitdictionary without releasing new versions of EML.
---------------- Message from Don Henshaw --------------------- 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