Data Management
Detailed Information About the JGOFS Distributed Database Management System (DDMS)
Examples of Projection
Projection -- choosing to display only particular variables -- is
accomplished by listing the desired variables as the argument to the
data object.
objectname(variablename1,variablename2,...)
Thus if we have a data object hyd (displayed by the programlist)
list "hyd"
# wunsch stations 3-5
# p<1000
=======================
leg, year, month
........................ [lowest (0) level data]
1, 81, 6
=======================
station, lat, lon
........................ [first level data]
3, 38.28, -73.53
=======================
press, temp, sal, o2, sigth
------------------------
5.000, 18.334, 33.570, 5.970, 24.096
25.000, 12.848, 34.159, 6.990, 25.773
49.000, 11.070, 34.523, 6.060, 26.394 [second level]
99.000, 11.093, 35.090, 5.340, 26.831
149.000, 11.906, 35.487, 5.020, 26.990
199.000, 10.819, 35.435, 4.210, 27.152
300.000, 8.293, 35.126, 3.730, 27.334
400.000, 6.363, 35.046, 4.640, 27.546
500.000, 5.724, 35.019, 4.980, 27.608
600.000, 5.031, 34.990, 5.460, 27.670
701.000, 4.633, 34.981, 5.680, 27.710
801.000, 4.515, 34.980, 5.850, 27.722
901.000, 4.376, 34.979, 5.880, 27.737
=======================
station, lat, lon
........................
4, 38.19, -73.52
=======================
press, temp, sal, o2, sigth
------------------------
5.000, 17.516, 33.160, 5.840, 23.981
25.000, 12.315, 33.958, 7.090, 25.721
49.000, 9.612, 34.192, 6.020, 26.387
99.000, 12.095, 35.402, 5.340, 26.887
149.000, 12.407, 35.625, 5.290, 27.000
199.000, 11.287, 35.487, 4.340, 27.108
300.000, 8.059, 35.120, 3.750, 27.365
400.000, 6.606, 35.053, 4.440, 27.520
500.000, 5.467, 34.997, 5.130, 27.622
600.000, 5.003, 34.983, 5.460, 27.667
701.000, 4.680, 34.979, 5.700, 27.702
801.000, 4.489, 34.977, 5.850, 27.722
901.000, 4.374, 34.978, 5.930, 27.737
=======================
station, lat, lon
........................
5, 38.16, -73.26
=======================
press, temp, sal, o2, sigth
------------------------
5.000, 18.382, 33.647, 5.770, 24.143
25.000, 12.040, 34.196, 6.660, 25.959
49.000, 11.951, 34.925, 5.510, 26.543
99.000, 11.914, 35.390, 5.100, 26.912
149.000, 12.045, 35.547, 5.070, 27.010
199.000, 11.976, 35.589, 4.940, 27.057
300.000, 9.425, 35.250, 3.620, 27.251
400.000, 7.003, 35.075, 4.210, 27.483
500.000, 5.827, 35.009, 4.910, 27.589
600.000, 5.252, 34.988, 5.300, 27.643
701.000, 4.845, 34.980, 5.610, 27.684
801.000, 4.635, 34.980, 5.710, 27.709
901.000, 4.444, 34.978, 5.940, 27.729
****** End of object ***
then we can select to list some of the variables
list "hyd(month,station,press,sigth)"
# wunsch stations 3-5
# p<1000
=======================
month
........................
6
=======================
station
........................
3
=======================
press, sigth
------------------------
5.000, 24.096
25.000, 25.773
49.000, 26.394
99.000, 26.831
149.000, 26.990
199.000, 27.152
300.000, 27.334
400.000, 27.546
500.000, 27.608
600.000, 27.670
701.000, 27.710
801.000, 27.722
901.000, 27.737
=======================
station
........................
4
=======================
press, sigth
------------------------
5.000, 23.981
25.000, 25.721
49.000, 26.387
99.000, 26.887
149.000, 27.000
199.000, 27.108
300.000, 27.365
400.000, 27.520
500.000, 27.622
600.000, 27.667
701.000, 27.702
801.000, 27.722
901.000, 27.737
=======================
station
........................
5
=======================
press, sigth
------------------------
5.000, 24.143
25.000, 25.959
49.000, 26.543
99.000, 26.912
149.000, 27.010
199.000, 27.057
300.000, 27.251
400.000, 27.483
500.000, 27.589
600.000, 27.643
701.000, 27.684
801.000, 27.709
901.000, 27.729
****** End of object ***
or
list "hyd(station,lat,lon)"
# wunsch stations 3-5
# p<1000
=======================
........................
=======================
station, lat, lon
------------------------
3, 38.28, -73.53
4, 38.19, -73.52
5, 38.16, -73.26
****** End of object ***
Note that data at levels higher than the requested information will
not be returned.
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