Data Management

DDMS Overview

Introduction

Basic Elements

Data Objects

Communications

User Applications

Manipulating Data

Installation

Further Info

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.

 


 

back to top