Re: [stem-dev] Changes to the earthscience data format

[James Kaufman <kaufman@xxxxxxxxxxxxxxx>]

Hi Jan,
I agree about removing those fields.

Re: 
# Field 3: Maximum
# Field 4: Minimum
# Field 5: Range
In the new data would max and min refer
to "over a period of time" (for a polygon)
and range be the range over the polygon
itself at a fixed time? Not sure about field 5....


IBM Almaden Research Center, 650 Harry Rd.
San Jose, CA 95120-6099
email: kaufman@xxxxxxxxxxxxxxx
phone: (408) 927-2477  (tie 457-2477)

From:	Jan H Pieper <jhpieper@xxxxxxxxxxxxxxx>
To:	stem-dev@xxxxxxxxxxx
Date:	04/12/2011 05:08 PM
Subject:	[stem-dev] Changes to the earthscience data format
Sent by:	stem-dev-bounces@xxxxxxxxxxx

---

Hi everyone,

I am working on adding ten years of earthscience data into STEM (the org.eclipse.stem.internal.data.geography.earthscience
plugin). 
I'd like to propose a few changes to the data format as follows:

1) Rounding: The current data files contain very precise numbers with many
digits in the fractional part. I suggest to round most numbers to two fractional
digits, which should be sufficient for temperature (celcius), rainfall
(millimeters), and elevation (meters). For vegetation, I suggest we use
three fractional digits because the values range from -0.1 to 0.9.

2) Data Fields: The current data files contain eight fields for each point
in time:
# Field 1: Average
# Field 2: Standard Deviation
# Field 3: Maximum
# Field 4: Minimum
# Field 5: Range
# Field 6: Skewness
# Field 7: Kurtosis
# Field 8: Root Mean Square

I propose to remove skewness and kurtosis (fields 6 and 7). They are measurements
for statistical distributions and cannot really be applied to these data
sets.

3) Lastly, I was wondering if there are any other derived values that should
be added to the list above. 

Thanks,

Jan :-)

Jan H. Pieper
IBM Almaden Research Center
mail: jhpieper@xxxxxxxxxxxxxxx_______________________________________________
stem-dev mailing list
stem-dev@xxxxxxxxxxx
https://dev.eclipse.org/mailman/listinfo/stem-dev