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Data description |


Historical Indonesian climate data at KNMI

The table below presents an inventory of the sources with Indonesian climate data available at KNMI and the estimated amounts of labor for digitizing each source.


period
data
amount
estimate labour#
Remarks
1866-1970
hourly observations
air pressure,
temperature,
moisture, etc.
Batavia/Jakarta

~ 105 years of
hourly
data: 105*365*24 =
~ 1 million obs.
(avg. 7
elements/obs.)

1 year of work
planner (including
metadata research)
+ 5 man-year typing
= 6 man-year

More recent
data needed
for interpretation
About

1879-1916

daily precipitation
sums
various stations

Avg. 300 precip
stations:
300*37*365=
over 4 million
observations.

1 year of work
planner
(including metadata
research)
+ 3 man-year typing
= 4 man-year
More recent
data needed
for interpretation
About

1917-1965

monthly statistics
derived from
daily values.
Per month:
precipitation sums,
number of
wet/dry days,
extremes, etc)
Avg. 2000 stations
with
3 numbers per month:
3 * 49 *12*2000=
3.5 million
observations.
1 year of work
planner
(including metadata
research)
+ 3 man-year typing
= 4 man-year
More recent
data needed
for interpretation

until
1889
mn.
1848-1858
periodical
observations
various stations
is digitized
is digitized
.
1910-1973
monthly and yearly
observations. Various
stations
74 monthly values
3 numbers per month
avg. 200 stations
200*74*12*3=
half a million
observations.
1 year of work
planner
(including metadata
research)
+ 1.5 man-year typing
= 2.5 man-year
It is not clear
what is already
digitally
available


# For the labor estimates it is assumed that all numbers are manually keyed into the spreadsheets. Use of OCR may shorten the estimated time but this needs to be checked at the start of the project. Estimates are based on experience with comparable projects within the KNMI Hisklim program.

 

Post-1970 Indonesian climate data at BMKG

The table below presents a preliminary inventory of the post-1970 climate data at BMKG that will be digitized within Didah. A more elaborate inventory will be produced during the project.

 

PERIOD
DATA
QUANTITY
APPX MY
1970 - 2008
- Hourly observed air
pressure, temperature,
moisture, etc.
- Batavia/Jakarta
~ 35 years of hourly data ~
0.5 million obs.
(avg. 7 element/obs)
5 MY
1970-2008
Monthly statistics derived
values including: precipitation
sums, number of wet/dry
days, extremes, etc
Avg. 2000 stations with 3
numbers per month ~ 3
million observations
10 MY