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Metocean: Historical collections
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Brought to you by NOAA NMFS SWFSC ERD |
Dataset Title: | "Deepwater CTD - 03252324.ctd.nc - 29.02N, -88.04W - 1977-07-20"
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Institution: | Texas A&M University, Department of Oceanography (Dataset ID: deepwater_03252324_ctd) |
Information: | Summary ![]() ![]() ![]() |
To view the map, check View : Map of All Related Data above.
WARNING: This may involve lots of data.
For some datasets, this may be slow.
Consider using this only when you need it and
have selected a small subset of the data.
To view the counts of distinct combinations of the variables listed above,
check View : Distinct Data Counts above and select a value for one of the variables above.
Distinct Data
(Metadata)
(Refine the data subset and/or download the data)
depth | temperature | salinity | oxygen | nitrite | nitrate | phosphate | silicate | salinity2 | qualityFlag |
---|---|---|---|---|---|---|---|---|---|
m | degree_C | PSU | milliliters per liter | micromols | micromols | micromols | micromols | PSU | |
0.0 | 29.110000610351562 | 36.08100128173828 | 4.579999923706055 | -99.98999786376953 | -99.98999786376953 | -99.98999786376953 | 0.20000000298023224 | -99.0 | 0.0 |
2.0 | 29.101999282836914 | 36.08399963378906 | 4.670000076293945 | -99.98999786376953 | 0.10000000149011612 | 0.009999999776482582 | 0.699999988079071 | -99.0 | 0.0 |
4.0 | 29.104000091552734 | 36.090999603271484 | 4.980000019073486 | -99.98999786376953 | -99.98999786376953 | 0.019999999552965164 | 0.8999999761581421 | -99.0 | 0.0 |
6.0 | 29.107999801635742 | 36.0890007019043 | 4.840000152587891 | 0.3199999928474426 | 0.30000001192092896 | 0.05000000074505806 | 1.2000000476837158 | -99.0 | 0.0 |
8.0 | 29.104000091552734 | 36.0880012512207 | 3.640000104904175 | 0.5199999809265137 | 3.799999952316284 | 0.20000000298023224 | 1.5 | -99.0 | 0.0 |
10.0 | 29.106000900268555 | 36.0880012512207 | 3.3499999046325684 | 0.3199999928474426 | 6.300000190734863 | 0.3199999928474426 | 1.7999999523162842 | -99.0 | 0.0 |
12.0 | 29.10700035095215 | 36.0880012512207 | 3.1500000953674316 | 0.2199999988079071 | 9.600000381469727 | 0.5 | 2.5 | -99.0 | 0.0 |
14.0 | 29.104999542236328 | 36.09199905395508 | 2.9800000190734863 | 0.11999999731779099 | 15.399999618530273 | 0.7900000214576721 | 4.0 | -99.0 | 0.0 |
16.0 | 29.106000900268555 | 36.09400177001953 | 2.940000057220459 | 0.11999999731779099 | 20.399999618530273 | 1.090000033378601 | 6.400000095367432 | -99.0 | 0.0 |
18.0 | 29.101999282836914 | 36.095001220703125 | 2.7899999618530273 | 0.7200000286102295 | 24.600000381469727 | 1.440000057220459 | 13.5 | -99.0 | 0.0 |
20.0 | 29.097000122070312 | 36.11199951171875 | 2.609999895095825 | -99.98999786376953 | 27.200000762939453 | 1.590000033378601 | 12.5 | -99.0 | 0.0 |
22.0 | 28.913000106811523 | 36.21799850463867 | 2.7699999809265137 | 0.2199999988079071 | 25.899999618530273 | 1.5499999523162842 | 13.0 | -99.0 | 0.0 |
24.0 | 28.70599937438965 | 36.46200180053711 | 0.0 | ||||||
26.0 | 28.30900001525879 | 36.45899963378906 | 0.0 | ||||||
28.0 | 28.121000289916992 | 36.459999084472656 | 0.0 | ||||||
30.0 | 27.916000366210938 | 36.4630012512207 | 0.0 | ||||||
32.0 | 27.60700035095215 | 36.45100021362305 | 0.0 | ||||||
34.0 | 27.18199920654297 | 36.41600036621094 | 0.0 | ||||||
36.0 | 26.937999725341797 | 36.40599822998047 | 0.0 | ||||||
38.0 | 26.45599937438965 | 36.36899948120117 | 0.0 | ||||||
40.0 | 26.007999420166016 | 36.345001220703125 | 0.0 | ||||||
42.0 | 25.611000061035156 | 36.358001708984375 | 0.0 | ||||||
44.0 | 25.134000778198242 | 36.2869987487793 | 0.0 | ||||||
46.0 | 24.941999435424805 | 36.27199935913086 | 0.0 | ||||||
48.0 | 24.792999267578125 | 36.28200149536133 | 0.0 | ||||||
50.0 | 24.777000427246094 | 36.367000579833984 | 0.0 | ||||||
52.0 | 24.670000076293945 | 36.40299987792969 | 0.0 | ||||||
54.0 | 24.607999801635742 | 36.41400146484375 | 0.0 | ||||||
56.0 | 24.47599983215332 | 36.40599822998047 | 0.0 | ||||||
58.0 | 24.231000900268555 | 36.400001525878906 | 0.0 | ||||||
60.0 | 24.104000091552734 | 36.4109992980957 | 0.0 | ||||||
62.0 | 23.95599937438965 | 36.441001892089844 | 0.0 | ||||||
64.0 | 23.777999877929688 | 36.45600128173828 | 0.0 | ||||||
66.0 | 23.61400032043457 | 36.45600128173828 | 0.0 | ||||||
68.0 | 23.40999984741211 | 36.39400100708008 | 0.0 | ||||||
70.0 | 23.138999938964844 | 36.388999938964844 | 0.0 | ||||||
72.0 | 22.958999633789062 | 36.37900161743164 | 0.0 | ||||||
74.0 | 22.746000289916992 | 36.375999450683594 | 0.0 | ||||||
76.0 | 22.4950008392334 | 36.375 | 0.0 | ||||||
78.0 | 22.344999313354492 | 36.39500045776367 | 0.0 | ||||||
80.0 | 22.118000030517578 | 36.40299987792969 | 0.0 | ||||||
82.0 | 21.91200065612793 | 36.39099884033203 | 0.0 | ||||||
84.0 | 21.764999389648438 | 36.380001068115234 | 0.0 | ||||||
86.0 | 21.42099952697754 | 36.321998596191406 | 0.0 | ||||||
88.0 | 21.143999099731445 | 36.29499816894531 | 0.0 | ||||||
90.0 | 21.107999801635742 | 36.32600021362305 | 0.0 | ||||||
92.0 | 21.009000778198242 | 36.356998443603516 | 0.0 | ||||||
94.0 | 20.91900062561035 | 36.358001708984375 | 0.0 | ||||||
96.0 | 20.80500030517578 | 36.358001708984375 | 0.0 | ||||||
98.0 | 20.52400016784668 | 36.31100082397461 | 0.0 | ||||||
100.0 | 20.415000915527344 | 36.33000183105469 | 0.0 | ||||||
102.0 | 20.395999908447266 | 36.334999084472656 | 0.0 | ||||||
104.0 | 20.31999969482422 | 36.332000732421875 | 0.0 | ||||||
106.0 | 20.225000381469727 | 36.32899856567383 | 0.0 | ||||||
108.0 | 20.086999893188477 | 36.33700180053711 | 0.0 | ||||||
110.0 | 19.99799919128418 | 36.35200119018555 | 0.0 | ||||||
112.0 | 19.822999954223633 | 36.35300064086914 | 0.0 | ||||||
114.0 | 19.729999542236328 | 36.35599899291992 | 0.0 | ||||||
116.0 | 19.687000274658203 | 36.358001708984375 | 0.0 | ||||||
118.0 | 19.584999084472656 | 36.354000091552734 | 0.0 | ||||||
120.0 | 19.531999588012695 | 36.358001708984375 | 0.0 | ||||||
122.0 | 19.511999130249023 | 36.35100173950195 | 0.0 | ||||||
124.0 | 19.437999725341797 | 36.34600067138672 | 0.0 | ||||||
126.0 | 19.290000915527344 | 36.35300064086914 | 0.0 | ||||||
128.0 | 19.266000747680664 | 36.37799835205078 | 0.0 | ||||||
130.0 | 19.26099967956543 | 36.38800048828125 | 0.0 | ||||||
132.0 | 19.18899917602539 | 36.37799835205078 | 0.0 | ||||||
134.0 | 19.09600067138672 | 36.36399841308594 | 0.0 | ||||||
136.0 | 19.02899932861328 | 36.37200164794922 | 0.0 | ||||||
138.0 | 18.910999298095703 | 36.37200164794922 | 0.0 | ||||||
140.0 | 18.875 | 36.3849983215332 | 0.0 | ||||||
142.0 | 18.826000213623047 | 36.382999420166016 | 0.0 | ||||||
144.0 | 18.719999313354492 | 36.374000549316406 | 0.0 | ||||||
146.0 | 18.610000610351562 | 36.37099838256836 | 0.0 | ||||||
148.0 | 18.45800018310547 | 36.367000579833984 | 0.0 | ||||||
150.0 | 18.368999481201172 | 36.36899948120117 | 0.0 | ||||||
152.0 | 18.226999282836914 | 36.362998962402344 | 0.0 | ||||||
154.0 | 18.18400001525879 | 36.35499954223633 | 0.0 | ||||||
156.0 | 18.017000198364258 | 36.34199905395508 | 0.0 | ||||||
158.0 | 17.88800048828125 | 36.323001861572266 | 0.0 | ||||||
160.0 | 17.746000289916992 | 36.29499816894531 | 0.0 | ||||||
162.0 | 17.55500030517578 | 36.30400085449219 | 0.0 | ||||||
164.0 | 17.333999633789062 | 36.2869987487793 | 0.0 | ||||||
166.0 | 17.280000686645508 | 36.290000915527344 | 0.0 | ||||||
168.0 | 17.218000411987305 | 36.2760009765625 | 0.0 | ||||||
170.0 | 17.06800079345703 | 36.25 | 0.0 | ||||||
172.0 | 16.860000610351562 | 36.23500061035156 | 0.0 | ||||||
174.0 | 16.763999938964844 | 36.22999954223633 | 0.0 | ||||||
176.0 | 16.722999572753906 | 36.2239990234375 | 0.0 | ||||||
178.0 | 16.64900016784668 | 36.21799850463867 | 0.0 | ||||||
180.0 | 16.56100082397461 | 36.209999084472656 | 0.0 | ||||||
182.0 | 16.466999053955078 | 36.17599868774414 | 0.0 | ||||||
184.0 | 16.3439998626709 | 36.145999908447266 | 0.0 | ||||||
186.0 | 16.2549991607666 | 36.14500045776367 | 0.0 | ||||||
188.0 | 16.17099952697754 | 36.12900161743164 | 0.0 | ||||||
190.0 | 16.04199981689453 | 36.10200119018555 | 0.0 | ||||||
192.0 | 15.954000473022461 | 36.0880012512207 | 0.0 | ||||||
194.0 | 15.88599967956543 | 36.08599853515625 | 0.0 | ||||||
196.0 | 15.826000213623047 | 36.0880012512207 | 0.0 | ||||||
198.0 | 15.78499984741211 | 36.082000732421875 | 0.0 | ||||||
200.0 | 15.696999549865723 | 36.066001892089844 | 0.0 | ||||||
202.0 | 15.600000381469727 | 36.04899978637695 | 0.0 | ||||||
204.0 | 15.550999641418457 | 36.051998138427734 | 0.0 | ||||||
206.0 | 15.467000007629395 | 36.040000915527344 | 0.0 | ||||||
208.0 | 15.425999641418457 | 36.0359992980957 | 0.0 | ||||||
210.0 | 15.371999740600586 | 36.02399826049805 | 0.0 | ||||||
212.0 | 15.298999786376953 | 36.013999938964844 | 0.0 | ||||||
214.0 | 15.187999725341797 | 35.99300003051758 | 0.0 | ||||||
216.0 | 15.086999893188477 | 35.97600173950195 | 0.0 | ||||||
218.0 | 15.041999816894531 | 35.96799850463867 | 0.0 | ||||||
220.0 | 14.994999885559082 | 35.9630012512207 | 0.0 | ||||||
222.0 | 14.918000221252441 | 35.94200134277344 | 0.0 | ||||||
224.0 | 14.869000434875488 | 35.930999755859375 | 0.0 | ||||||
226.0 | 14.83899974822998 | 35.933998107910156 | 0.0 | ||||||
228.0 | 14.772000312805176 | 35.9109992980957 | 0.0 | ||||||
230.0 | 14.687999725341797 | 35.9119987487793 | 0.0 | ||||||
232.0 | 14.670999526977539 | 35.9119987487793 | 0.0 | ||||||
234.0 | 14.605999946594238 | 35.89799880981445 | 0.0 | ||||||
236.0 | 14.512999534606934 | 35.88999938964844 | 0.0 | ||||||
238.0 | 14.444999694824219 | 35.87900161743164 | 0.0 | ||||||
240.0 | 14.392000198364258 | 35.869998931884766 | 0.0 | ||||||
242.0 | 14.317000389099121 | 35.85599899291992 | 0.0 | ||||||
244.0 | 14.244000434875488 | 35.85300064086914 | 0.0 | ||||||
246.0 | 14.161999702453613 | 35.83599853515625 | 0.0 | ||||||
248.0 | 14.043000221252441 | 35.814998626708984 | 0.0 | ||||||
250.0 | 13.930999755859375 | 35.79800033569336 | 0.0 | ||||||
252.0 | 13.887999534606934 | 35.78900146484375 | 0.0 | ||||||
254.0 | 13.795000076293945 | 35.7760009765625 | 0.0 | ||||||
256.0 | 13.741000175476074 | 35.77199935913086 | 0.0 | ||||||
258.0 | 13.661999702453613 | 35.744998931884766 | 0.0 | ||||||
260.0 | 13.517000198364258 | 35.70199966430664 | 0.0 | ||||||
262.0 | 13.454000473022461 | 35.702999114990234 | 0.0 | ||||||
264.0 | 13.378999710083008 | 35.69200134277344 | 0.0 | ||||||
266.0 | 13.317000389099121 | 35.68899917602539 | 0.0 | ||||||
268.0 | 13.244999885559082 | 35.66600036621094 | 0.0 | ||||||
270.0 | 13.135000228881836 | 35.64699935913086 | 0.0 | ||||||
272.0 | 13.069000244140625 | 35.63800048828125 | 0.0 | ||||||
274.0 | 12.968000411987305 | 35.61000061035156 | 0.0 | ||||||
276.0 | 12.86299991607666 | 35.59400177001953 | 0.0 | ||||||
278.0 | 12.755000114440918 | 35.58100128173828 | 0.0 | ||||||
280.0 | 12.682999610900879 | 35.577999114990234 | 0.0 | ||||||
282.0 | 12.633999824523926 | 35.57099914550781 | 0.0 | ||||||
284.0 | 12.543999671936035 | 35.551998138427734 | 0.0 | ||||||
286.0 | 12.489999771118164 | 35.55400085449219 | 0.0 | ||||||
288.0 | 12.444000244140625 | 35.54100036621094 | 0.0 | ||||||
290.0 | 12.336999893188477 | 35.520999908447266 | 0.0 | ||||||
292.0 | 12.265999794006348 | 35.50699996948242 | 0.0 | ||||||
294.0 | 12.196000099182129 | 35.50199890136719 | 0.0 | ||||||
296.0 | 12.133000373840332 | 35.49700164794922 | 0.0 | ||||||
298.0 | 12.074000358581543 | 35.49300003051758 | 0.0 | ||||||
300.0 | 12.017999649047852 | 35.4900016784668 | 0.0 | ||||||
302.0 | 12.01099967956543 | 35.487998962402344 | 0.0 | ||||||
304.0 | 11.904999732971191 | 35.46799850463867 | 0.0 | ||||||
306.0 | 11.84000015258789 | 35.46099853515625 | 0.0 | ||||||
308.0 | 11.762999534606934 | 35.44599914550781 | 0.0 | ||||||
310.0 | 11.654999732971191 | 35.435001373291016 | 0.0 | ||||||
312.0 | 11.583999633789062 | 35.42100143432617 | 0.0 | ||||||
314.0 | 11.565999984741211 | 35.417999267578125 | 0.0 | ||||||
316.0 | 11.5 | 35.4109992980957 | 0.0 | ||||||
318.0 | 11.425000190734863 | 35.395999908447266 | 0.0 | ||||||
320.0 | 11.36299991607666 | 35.391998291015625 | 0.0 | ||||||
322.0 | 11.298999786376953 | 35.380001068115234 | 0.0 | ||||||
324.0 | 11.26099967956543 | 35.37200164794922 | 0.0 | ||||||
326.0 | 11.1899995803833 | 35.36800003051758 | 0.0 | ||||||
328.0 | 11.12600040435791 | 35.35100173950195 | 0.0 | ||||||
330.0 | 11.01200008392334 | 35.33599853515625 | 0.0 | ||||||
332.0 | 10.946000099182129 | 35.32500076293945 | 0.0 | ||||||
334.0 | 10.88700008392334 | 35.31700134277344 | 0.0 | ||||||
336.0 | 10.821000099182129 | 35.29999923706055 | 0.0 | ||||||
338.0 | 10.746000289916992 | 35.290000915527344 | 0.0 | ||||||
340.0 | 10.704000473022461 | 35.2859992980957 | 0.0 | ||||||
342.0 | 10.666000366210938 | 35.28099822998047 | 0.0 | ||||||
344.0 | 10.583000183105469 | 35.262001037597656 | 0.0 | ||||||
346.0 | 10.505000114440918 | 35.255001068115234 | 0.0 | ||||||
348.0 | 10.42300033569336 | 35.23699951171875 | 0.0 | ||||||
350.0 | 10.36299991607666 | 35.22999954223633 | 0.0 | ||||||
352.0 | 10.279999732971191 | 35.215999603271484 | 0.0 | ||||||
354.0 | 10.197999954223633 | 35.2130012512207 | 0.0 | ||||||
356.0 | 10.168999671936035 | 35.21099853515625 | 0.0 | ||||||
358.0 | 10.121000289916992 | 35.20199966430664 | 0.0 | ||||||
360.0 | 10.053000450134277 | 35.189998626708984 | 0.0 | ||||||
362.0 | 10.01099967956543 | 35.18600082397461 | 0.0 | ||||||
364.0 | 9.927000045776367 | 35.17499923706055 | 0.0 | ||||||
366.0 | 9.883000373840332 | 35.17100143432617 | 0.0 | ||||||
368.0 | 9.833999633789062 | 35.16400146484375 | 0.0 | ||||||
370.0 | 9.795000076293945 | 35.15800094604492 | 0.0 | ||||||
372.0 | 9.767000198364258 | 35.154998779296875 | 0.0 | ||||||
374.0 | 9.722999572753906 | 35.14699935913086 | 0.0 | ||||||
376.0 | 9.682000160217285 | 35.138999938964844 | 0.0 | ||||||
378.0 | 9.628000259399414 | 35.13600158691406 | 0.0 | ||||||
380.0 | 9.576000213623047 | 35.12699890136719 | 0.0 | ||||||
382.0 | 9.496999740600586 | 35.12099838256836 | 0.0 | ||||||
384.0 | 9.45300006866455 | 35.112998962402344 | 0.0 | ||||||
386.0 | 9.4399995803833 | 35.11199951171875 | 0.0 | ||||||
388.0 | 9.37399959564209 | 35.099998474121094 | 0.0 | ||||||
390.0 | 9.343999862670898 | 35.09700012207031 | 0.0 | ||||||
392.0 | 9.315999984741211 | 35.09700012207031 | 0.0 | ||||||
394.0 | 9.267000198364258 | 35.0890007019043 | 0.0 | ||||||
396.0 | 9.225000381469727 | 35.08399963378906 | 0.0 | ||||||
398.0 | 9.175000190734863 | 35.07099914550781 | 0.0 | ||||||
400.0 | 9.152999877929688 | 35.07400131225586 | 0.0 | ||||||
402.0 | 9.12600040435791 | 35.06800079345703 | 0.0 | ||||||
404.0 | 9.097999572753906 | 35.06700134277344 | 0.0 | ||||||
406.0 | 9.0600004196167 | 35.058998107910156 | 0.0 | ||||||
408.0 | 9.03600025177002 | 35.060001373291016 | 0.0 | ||||||
410.0 | 8.97599983215332 | 35.053001403808594 | 0.0 | ||||||
412.0 | 8.927000045776367 | 35.04999923706055 | 0.0 | ||||||
414.0 | 8.878000259399414 | 35.04199981689453 | 0.0 | ||||||
416.0 | 8.824000358581543 | 35.034000396728516 | 0.0 | ||||||
418.0 | 8.77299976348877 | 35.02899932861328 | 0.0 | ||||||
420.0 | 8.760000228881836 | 35.029998779296875 | 0.0 | ||||||
422.0 | 8.732000350952148 | 35.02899932861328 | 0.0 | ||||||
424.0 | 8.697999954223633 | 35.025001525878906 | 0.0 | ||||||
426.0 | 8.668000221252441 | 35.01900100708008 | 0.0 | ||||||
428.0 | 8.638999938964844 | 35.016998291015625 | 0.0 | ||||||
430.0 | 8.604000091552734 | 35.01599884033203 | 0.0 | ||||||
432.0 | 8.576000213623047 | 35.00899887084961 | 0.0 | ||||||
434.0 | 8.534000396728516 | 35.00699996948242 | 0.0 | ||||||
436.0 | 8.477999687194824 | 35.00199890136719 | 0.0 | ||||||
438.0 | 8.442999839782715 | 34.99800109863281 | 0.0 | ||||||
440.0 | 8.418999671936035 | 34.992000579833984 | 0.0 | ||||||
442.0 | 8.388999938964844 | 34.99100112915039 | 0.0 | ||||||
444.0 | 8.345999717712402 | 34.986000061035156 | 0.0 | ||||||
446.0 | 8.321000099182129 | 34.981998443603516 | 0.0 | ||||||
448.0 | 8.279999732971191 | 34.97800064086914 | 0.0 | ||||||
450.0 | 8.237000465393066 | 34.9739990234375 | 0.0 | ||||||
452.0 | 8.20300006866455 | 34.96900177001953 | 0.0 | ||||||
454.0 | 8.147000312805176 | 34.957000732421875 | 0.0 | ||||||
456.0 | 8.095999717712402 | 34.95000076293945 | 1.0 | ||||||
458.0 | 8.055999755859375 | 34.95199966430664 | 0.0 | ||||||
460.0 | 8.03499984741211 | 34.95100021362305 | 0.0 | ||||||
462.0 | 7.98199987411499 | 34.93899917602539 | 1.0 | ||||||
464.0 | 7.955999851226807 | 34.94300079345703 | 0.0 | ||||||
466.0 | 7.926000118255615 | 34.939998626708984 | 0.0 | ||||||
468.0 | 7.906000137329102 | 34.9370002746582 | 0.0 | ||||||
470.0 | 7.888999938964844 | 34.93899917602539 | 0.0 | ||||||
472.0 | 7.880000114440918 | 34.935001373291016 | 0.0 | ||||||
474.0 | 7.867000102996826 | 34.9379997253418 | 0.0 | ||||||
476.0 | 7.8470001220703125 | 34.9370002746582 | 0.0 | ||||||
478.0 | 7.815999984741211 | 34.93199920654297 | 0.0 | ||||||
480.0 | 7.770999908447266 | 34.928001403808594 | 0.0 | ||||||
482.0 | 7.738999843597412 | 34.91999816894531 | 0.0 | ||||||
484.0 | 7.71999979019165 | 34.92300033569336 | 0.0 | ||||||
486.0 | 7.711999893188477 | 34.922000885009766 | 0.0 | ||||||
488.0 | 7.696000099182129 | 34.92399978637695 | 0.0 | ||||||
490.0 | 7.681000232696533 | 34.91999816894531 | 0.0 | ||||||
492.0 | 7.668000221252441 | 34.91999816894531 | 0.0 | ||||||
494.0 | 7.664000034332275 | 34.922000885009766 | 0.0 | ||||||
496.0 | 7.6579999923706055 | 34.92300033569336 | 0.0 | ||||||
498.0 | 7.642000198364258 | 34.92100143432617 | 0.0 |
In total, there are 250 rows of distinct combinations of the variables listed above.
All of the rows are shown above.
To change the maximum number of rows displayed, change View : Distinct Data above.
To view the related data counts,
check View : Related Data Counts above and select a value for one of the variables above.
WARNING: This may involve lots of data.
For some datasets, this may be slow.
Consider using this only when you need it and
have selected a small subset of the data.
Related Data
(Metadata)
(Refine the data subset and/or download the data)
To view the related data, change View : Related Data above.
WARNING: This may involve lots of data. For some datasets, this may be slow. Consider using this only when you need it and have selected a small subset of the data.