Metocean: Historical collections
|
Brought to you by NOAA NMFS SWFSC ERD |
Dataset Title: | "NEGOM CTD - n6l11s04.nc - 27.5N, 83.5W - 1999-00-21" |
Institution: | OCEAN.TAMU (Dataset ID: negom_n6l11s04) |
Information: | Summary | License | FGDC | ISO 19115 | Metadata | Background | Data Access Form | Files | Make a graph |
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)
pressure | depth | temperature | potentialTemperature | conductivity | salinity | sigmat | descentRate | transmission | par | parv | fluorescence | backscattering |
---|---|---|---|---|---|---|---|---|---|---|---|---|
dBar | m | degree_C | degree_C | Siemens per meter | PSU | kg m-3 | meters per second | percent | umol m-2 s-1 | volts | volts | volts |
2.5 | 2.5 | 30.285900115966797 | 30.28529930114746 | 5.987299919128418 | 35.814998626708984 | 22.23940086364746 | 0.20600000023841858 | 4.363999843597412 | 118.19999694824219 | 2.36899995803833 | 0.8970000147819519 | -9.0 |
3.0 | 3.0 | 30.287700653076172 | 30.28689956665039 | 5.987500190734863 | 35.81489944458008 | 22.23870086669922 | 0.28700000047683716 | 4.364999771118164 | 98.87999725341797 | 2.2929999828338623 | 0.8450000286102295 | -9.0 |
3.5 | 3.5 | 30.29319953918457 | 30.292299270629883 | 5.988100051879883 | 35.814701080322266 | 22.2367000579834 | 0.28200000524520874 | 4.361999988555908 | 93.2300033569336 | 2.2669999599456787 | 0.8159999847412109 | -9.0 |
4.0 | 4.0 | 30.30340003967285 | 30.302400588989258 | 5.989299774169922 | 35.815101623535156 | 22.23349952697754 | 0.5350000262260437 | 4.363999843597412 | 86.73999786376953 | 2.236999988555908 | 0.8410000205039978 | -9.0 |
4.5 | 4.5 | 30.249000549316406 | 30.247900009155273 | 5.98360013961792 | 35.81700134277344 | 22.253700256347656 | 0.546999990940094 | 4.363999843597412 | 81.91000366210938 | 2.2119998931884766 | 0.8619999885559082 | -9.0 |
5.0 | 5.0 | 30.284099578857422 | 30.282800674438477 | 5.987400054931641 | 35.81669998168945 | 22.241500854492188 | 0.40400001406669617 | 4.363999843597412 | 75.87000274658203 | 2.178999900817871 | 0.875 | -9.0 |
5.5 | 5.5 | 30.29490089416504 | 30.293500900268555 | 5.988699913024902 | 35.816898345947266 | 22.237899780273438 | 0.34599998593330383 | 4.36299991607666 | 69.12999725341797 | 2.138000011444092 | 0.8870000243186951 | -9.0 |
6.0 | 6.0 | 30.199899673461914 | 30.198400497436523 | 5.978600025177002 | 35.81850051879883 | 22.271900177001953 | 0.4970000088214874 | 4.363999843597412 | 62.72999954223633 | 2.0969998836517334 | 0.9210000038146973 | -9.0 |
6.5 | 6.5 | 30.145999908447266 | 30.144399642944336 | 5.973100185394287 | 35.82109832763672 | 22.292400360107422 | 0.5490000247955322 | 4.360000133514404 | 63.0099983215332 | 2.0980000495910645 | 0.9179999828338623 | -9.0 |
7.0 | 7.0 | 30.04640007019043 | 30.044599533081055 | 5.963099956512451 | 35.826900482177734 | 22.33099937438965 | 0.45500001311302185 | 4.354000091552734 | 62.06999969482422 | 2.0920000076293945 | 0.8999999761581421 | -9.0 |
7.599999904632568 | 7.5 | 29.97949981689453 | 29.97760009765625 | 5.956399917602539 | 35.8306999206543 | 22.356800079345703 | 0.3659999966621399 | 4.355000019073486 | 53.52000045776367 | 2.0269999504089355 | 0.8820000290870667 | -9.0 |
8.100000381469727 | 8.0 | 29.958099365234375 | 29.956100463867188 | 5.953999996185303 | 35.830101013183594 | 22.36370086669922 | 0.46000000834465027 | 4.355000019073486 | 55.90999984741211 | 2.046999931335449 | 0.9300000071525574 | -9.0 |
8.600000381469727 | 8.5 | 29.94580078125 | 29.943700790405273 | 5.952600002288818 | 35.829898834228516 | 22.367799758911133 | 0.4749999940395355 | 4.354000091552734 | 51.939998626708984 | 2.015000104904175 | 0.9319999814033508 | -9.0 |
9.100000381469727 | 9.0 | 29.936199188232422 | 29.93400001525879 | 5.951600074768066 | 35.830101013183594 | 22.371299743652344 | 0.41999998688697815 | 4.3520002365112305 | 50.68000030517578 | 2.003999948501587 | 0.921999990940094 | -9.0 |
9.600000381469727 | 9.5 | 29.926599502563477 | 29.9242000579834 | 5.950699806213379 | 35.8306999206543 | 22.375 | 0.43299999833106995 | 4.353000164031982 | 47.58000183105469 | 1.9769999980926514 | 0.9259999990463257 | -9.0 |
10.100000381469727 | 10.0 | 29.924100875854492 | 29.921600341796875 | 5.950699806213379 | 35.83259963989258 | 22.377399444580078 | 0.44699999690055847 | 4.348999977111816 | 47.11000061035156 | 1.972000002861023 | 0.9169999957084656 | -9.0 |
10.600000381469727 | 10.5 | 29.92060089111328 | 29.917999267578125 | 5.950500011444092 | 35.833499908447266 | 22.37929916381836 | 0.4189999997615814 | 4.3520002365112305 | 45.650001525878906 | 1.9579999446868896 | 0.9100000262260437 | -9.0 |
11.100000381469727 | 11.0 | 29.913700103759766 | 29.910999298095703 | 5.94980001449585 | 35.83399963378906 | 22.382099151611328 | 0.4390000104904175 | 4.348999977111816 | 42.56999969482422 | 1.9279999732971191 | 0.902999997138977 | -9.0 |
11.600000381469727 | 11.5 | 29.9060001373291 | 29.903099060058594 | 5.949100017547607 | 35.83440017700195 | 22.385000228881836 | 0.4729999899864197 | 4.3480000495910645 | 43.720001220703125 | 1.940000057220459 | 0.8970000147819519 | -9.0 |
12.100000381469727 | 12.0 | 29.904399871826172 | 29.901399612426758 | 5.949100017547607 | 35.83599853515625 | 22.38680076599121 | 0.42500001192092896 | 4.348999977111816 | 41.5099983215332 | 1.9170000553131104 | 0.8809999823570251 | -9.0 |
12.600000381469727 | 12.5 | 29.90410041809082 | 29.900999069213867 | 5.9492998123168945 | 35.83689880371094 | 22.387699127197266 | 0.3970000147819519 | 4.3480000495910645 | 40.20000076293945 | 1.902999997138977 | 0.8880000114440918 | -9.0 |
13.100000381469727 | 13.0 | 29.898500442504883 | 29.895299911499023 | 5.948699951171875 | 35.83689880371094 | 22.38960075378418 | 0.48500001430511475 | 4.348999977111816 | 38.38999938964844 | 1.8839999437332153 | 0.8980000019073486 | -9.0 |
13.600000381469727 | 13.5 | 29.892000198364258 | 29.888599395751953 | 5.9481000900268555 | 35.83760070800781 | 22.39240074157715 | 0.49900001287460327 | 4.3420000076293945 | 39.380001068115234 | 1.8940000534057617 | 0.9039999842643738 | -9.0 |
14.100000381469727 | 14.0 | 29.888999938964844 | 29.885499954223633 | 5.947800159454346 | 35.837501525878906 | 22.393400192260742 | 0.39899998903274536 | 4.3480000495910645 | 36.849998474121094 | 1.8650000095367432 | 0.9290000200271606 | -9.0 |
14.600000381469727 | 14.5 | 29.890100479125977 | 29.886499404907227 | 5.947999954223633 | 35.838199615478516 | 22.393600463867188 | 0.38100001215934753 | 4.3470001220703125 | 35.93000030517578 | 1.8550000190734863 | 0.9229999780654907 | -9.0 |
15.100000381469727 | 15.0 | 29.89150047302246 | 29.887800216674805 | 5.948400020599365 | 35.839599609375 | 22.39419937133789 | 0.48899999260902405 | 4.348999977111816 | 34.959999084472656 | 1.843000054359436 | 0.9359999895095825 | -9.0 |
15.600000381469727 | 15.5 | 29.88990020751953 | 29.88599967956543 | 5.948299884796143 | 35.83980178833008 | 22.394899368286133 | 0.49300000071525574 | 4.3460001945495605 | 34.880001068115234 | 1.8420000076293945 | 0.9359999895095825 | -9.0 |
16.100000381469727 | 16.0 | 29.886600494384766 | 29.882600784301758 | 5.947999954223633 | 35.8400993347168 | 22.396299362182617 | 0.42800000309944153 | 4.3460001945495605 | 33.4900016784668 | 1.8240000009536743 | 0.925000011920929 | -9.0 |
16.600000381469727 | 16.5 | 29.8843994140625 | 29.880300521850586 | 5.947800159454346 | 35.84049987792969 | 22.397499084472656 | 0.43799999356269836 | 4.3470001220703125 | 32.66999816894531 | 1.812999963760376 | 0.9190000295639038 | -9.0 |
17.100000381469727 | 17.0 | 29.8843994140625 | 29.880199432373047 | 5.9481000900268555 | 35.84230041503906 | 22.398799896240234 | 0.42899999022483826 | 4.3480000495910645 | 32.33000183105469 | 1.809000015258789 | 0.9100000262260437 | -9.0 |
17.600000381469727 | 17.5 | 29.8843994140625 | 29.8799991607666 | 5.948299884796143 | 35.843299865722656 | 22.399599075317383 | 0.3790000081062317 | 4.349999904632568 | 31.040000915527344 | 1.7910000085830688 | 0.9129999876022339 | -9.0 |
18.100000381469727 | 18.0 | 29.881900787353516 | 29.877399444580078 | 5.947999954223633 | 35.842899322509766 | 22.40019989013672 | 0.4729999899864197 | 4.3460001945495605 | 30.8799991607666 | 1.7890000343322754 | 0.9300000071525574 | -9.0 |
18.600000381469727 | 18.5 | 29.878299713134766 | 29.873699188232422 | 5.947400093078613 | 35.84189987182617 | 22.400699615478516 | 0.5210000276565552 | 4.3470001220703125 | 30.280000686645508 | 1.7799999713897705 | 0.9539999961853027 | -9.0 |
19.100000381469727 | 19.0 | 29.877700805664062 | 29.87299919128418 | 5.947500228881836 | 35.84280014038086 | 22.40169906616211 | 0.44999998807907104 | 4.348999977111816 | 29.290000915527344 | 1.7660000324249268 | 0.9449999928474426 | -9.0 |
19.600000381469727 | 19.5 | 29.878299713134766 | 29.87339973449707 | 5.947800159454346 | 35.844200134277344 | 22.40250015258789 | 0.3779999911785126 | 4.348999977111816 | 28.639999389648438 | 1.75600004196167 | 0.9470000267028809 | -9.0 |
20.100000381469727 | 20.0 | 29.875499725341797 | 29.870500564575195 | 5.9475998878479 | 35.84489822387695 | 22.40399932861328 | 0.4359999895095825 | 4.3470001220703125 | 28.579999923706055 | 1.7549999952316284 | 0.9399999976158142 | -9.0 |
20.600000381469727 | 20.5 | 29.871999740600586 | 29.866899490356445 | 5.947199821472168 | 35.844398498535156 | 22.40489959716797 | 0.4569999873638153 | 4.348999977111816 | 27.540000915527344 | 1.7389999628067017 | 0.9210000038146973 | -9.0 |
21.100000381469727 | 21.0 | 29.87019920349121 | 29.864999771118164 | 5.947299957275391 | 35.846099853515625 | 22.40679931640625 | 0.41200000047683716 | 4.3470001220703125 | 27.1299991607666 | 1.7330000400543213 | 0.9309999942779541 | -9.0 |
21.600000381469727 | 21.5 | 29.874000549316406 | 29.868600845336914 | 5.9492998123168945 | 35.85710144042969 | 22.41390037536621 | 0.453000009059906 | 4.3480000495910645 | 26.889999389648438 | 1.7289999723434448 | 0.9490000009536743 | -9.0 |
22.100000381469727 | 22.0 | 29.8789005279541 | 29.87339973449707 | 5.950699806213379 | 35.86249923706055 | 22.416200637817383 | 0.4950000047683716 | 4.34499979019165 | 26.350000381469727 | 1.7200000286102295 | 0.9570000171661377 | -9.0 |
22.700000762939453 | 22.5 | 29.869199752807617 | 29.86359977722168 | 5.950500011444092 | 35.868499755859375 | 22.424100875854492 | 0.4300000071525574 | 4.34499979019165 | 25.43000030517578 | 1.7050000429153442 | 0.953000009059906 | -9.0 |
23.200000762939453 | 23.0 | 29.874399185180664 | 29.86870002746582 | 5.95389986038208 | 35.88740158081055 | 22.436500549316406 | 0.3569999933242798 | 4.343999862670898 | 25.049999237060547 | 1.6979999542236328 | 0.9580000042915344 | -9.0 |
23.700000762939453 | 23.5 | 29.87660026550293 | 29.87070083618164 | 5.958499908447266 | 35.916900634765625 | 22.45800018310547 | 0.4440000057220459 | 4.340000152587891 | 24.75 | 1.6929999589920044 | 0.9769999980926514 | -9.0 |
24.200000762939453 | 24.0 | 29.858699798583984 | 29.852699279785156 | 5.962299823760986 | 35.9557991027832 | 22.49340057373047 | 0.5249999761581421 | 4.3420000076293945 | 24.100000381469727 | 1.680999994277954 | 0.9879999756813049 | -9.0 |
24.700000762939453 | 24.5 | 29.778499603271484 | 29.77239990234375 | 5.9654998779296875 | 36.037601470947266 | 22.58209991455078 | 0.46799999475479126 | 4.339000225067139 | 23.510000228881836 | 1.6710000038146973 | 0.9860000014305115 | -9.0 |
25.200000762939453 | 25.0 | 29.715499877929688 | 29.709299087524414 | 5.967400074005127 | 36.0974006652832 | 22.648500442504883 | 0.36800000071525574 | 4.339000225067139 | 23.040000915527344 | 1.6619999408721924 | 0.9879999756813049 | -9.0 |
25.700000762939453 | 25.5 | 29.61949920654297 | 29.61319923400879 | 5.963600158691406 | 36.14310073852539 | 22.715499877929688 | 0.4339999854564667 | 4.3379998207092285 | 22.700000762939453 | 1.6549999713897705 | 1.0230000019073486 | -9.0 |
26.200000762939453 | 26.0 | 29.50040054321289 | 29.493999481201172 | 5.9558000564575195 | 36.179500579833984 | 22.78339958190918 | 0.44699999690055847 | 4.3379998207092285 | 21.950000762939453 | 1.6410000324249268 | 1.0440000295639038 | -9.0 |
26.700000762939453 | 26.5 | 29.29949951171875 | 29.292999267578125 | 5.936600208282471 | 36.19850158691406 | 22.865699768066406 | 0.42800000309944153 | 4.331999778747559 | 21.530000686645508 | 1.6319999694824219 | 1.0390000343322754 | -9.0 |
27.200000762939453 | 27.0 | 28.972999572753906 | 28.966400146484375 | 5.900700092315674 | 36.198001861572266 | 22.975200653076172 | 0.4560000002384186 | 4.335000038146973 | 20.969999313354492 | 1.621000051498413 | 1.0329999923706055 | -9.0 |
27.700000762939453 | 27.5 | 28.672300338745117 | 28.665599822998047 | 5.868000030517578 | 36.19929885864258 | 23.07670021057129 | 0.42500001192092896 | 4.331999778747559 | 20.489999771118164 | 1.6109999418258667 | 1.0579999685287476 | -9.0 |
28.200000762939453 | 28.0 | 28.3617000579834 | 28.354999542236328 | 5.8343000411987305 | 36.20130157470703 | 23.181400299072266 | 0.38600000739097595 | 4.331999778747559 | 19.8700008392334 | 1.5980000495910645 | 1.0670000314712524 | -9.0 |
28.700000762939453 | 28.5 | 28.07859992980957 | 28.071800231933594 | 5.807600021362305 | 36.2307014465332 | 23.296899795532227 | 0.4269999861717224 | 4.331999778747559 | 19.299999237060547 | 1.5850000381469727 | 1.0740000009536743 | -9.0 |
29.200000762939453 | 29.0 | 27.81800079345703 | 27.811100006103516 | 5.7870001792907715 | 36.28609848022461 | 23.424100875854492 | 0.4830000102519989 | 4.330999851226807 | 18.809999465942383 | 1.5740000009536743 | 1.0820000171661377 | -9.0 |
29.700000762939453 | 29.5 | 27.660499572753906 | 27.653499603271484 | 5.772799968719482 | 36.307098388671875 | 23.491300582885742 | 0.4399999976158142 | 4.333000183105469 | 18.34000015258789 | 1.562999963760376 | 1.0980000495910645 | -9.0 |
30.200000762939453 | 30.0 | 27.49570083618164 | 27.48870086669922 | 5.75540018081665 | 36.311100006103516 | 23.54800033569336 | 0.3499999940395355 | 4.334000110626221 | 17.6299991607666 | 1.5460000038146973 | 1.1369999647140503 | -9.0 |
30.700000762939453 | 30.5 | 27.235300064086914 | 27.228200912475586 | 5.7266998291015625 | 36.308998107910156 | 23.630699157714844 | 0.3840000033378601 | 4.331999778747559 | 17.18000030517578 | 1.534000039100647 | 1.1440000534057617 | -9.0 |
31.200000762939453 | 31.0 | 27.105199813842773 | 27.097999572753906 | 5.712399959564209 | 36.308101654052734 | 23.672000885009766 | 0.36800000071525574 | 4.328999996185303 | 16.75 | 1.5230000019073486 | 1.1369999647140503 | -9.0 |
31.700000762939453 | 31.5 | 26.925399780273438 | 26.918100357055664 | 5.69379997253418 | 36.314701080322266 | 23.734600067138672 | 0.23499999940395355 | 4.328999996185303 | 16.079999923706055 | 1.5049999952316284 | 1.159999966621399 | -9.0 |
32.20000076293945 | 32.0 | 26.69339942932129 | 26.68600082397461 | 5.668700218200684 | 36.31560134887695 | 23.809499740600586 | 0.2840000092983246 | 4.322000026702881 | 15.630000114440918 | 1.4930000305175781 | 1.2039999961853027 | -9.0 |
32.70000076293945 | 32.5 | 26.508399963378906 | 26.500999450683594 | 5.649499893188477 | 36.3218994140625 | 23.87310028076172 | 0.2619999945163727 | 4.315000057220459 | 15.180000305175781 | 1.4809999465942383 | 1.2309999465942383 | -9.0 |
33.20000076293945 | 33.0 | 26.342599868774414 | 26.335100173950195 | 5.631899833679199 | 36.325199127197266 | 23.9281005859375 | 0.22200000286102295 | 4.308000087738037 | 14.739999771118164 | 1.468000054359436 | 1.2760000228881836 | -9.0 |
33.70000076293945 | 33.5 | 26.25589942932129 | 26.248300552368164 | 5.622099876403809 | 36.3218994140625 | 23.952999114990234 | 0.2750000059604645 | 4.298999786376953 | 14.279999732971191 | 1.4539999961853027 | 1.315999984741211 | -9.0 |
34.20000076293945 | 34.0 | 26.203800201416016 | 26.19610023498535 | 5.616300106048584 | 36.32059860229492 | 23.9685001373291 | 0.3529999852180481 | 4.291999816894531 | 13.710000038146973 | 1.4359999895095825 | 1.3309999704360962 | -9.0 |
34.70000076293945 | 34.5 | 26.166200637817383 | 26.15839958190918 | 5.61269998550415 | 36.324100494384766 | 23.982999801635742 | 0.20000000298023224 | 4.281000137329102 | 13.25 | 1.4210000038146973 | 1.3619999885559082 | -9.0 |
35.20000076293945 | 35.0 | 26.138099670410156 | 26.130199432373047 | 5.6097002029418945 | 36.324501037597656 | 23.99220085144043 | 0.2529999911785126 | 4.270999908447266 | 12.890000343322754 | 1.409000039100647 | 1.3919999599456787 | -9.0 |
35.70000076293945 | 35.5 | 26.09950065612793 | 26.09149932861328 | 5.605599880218506 | 36.325199127197266 | 24.00480079650879 | 0.2150000035762787 | 4.26200008392334 | 12.609999656677246 | 1.399999976158142 | 1.4170000553131104 | -9.0 |
36.20000076293945 | 36.0 | 26.072599411010742 | 26.06450080871582 | 5.60290002822876 | 36.32600021362305 | 24.013900756835938 | 0.18700000643730164 | 4.24399995803833 | 12.210000038146973 | 1.3860000371932983 | 1.4570000171661377 | -9.0 |
36.70000076293945 | 36.5 | 26.044599533081055 | 26.036399841308594 | 5.599800109863281 | 36.32529830932617 | 24.022199630737305 | 0.16300000250339508 | 4.2230000495910645 | 11.920000076293945 | 1.3760000467300415 | 1.496999979019165 | -9.0 |
37.20000076293945 | 37.0 | 25.99209976196289 | 25.983800888061523 | 5.594200134277344 | 36.32590103149414 | 24.039199829101562 | 0.1809999942779541 | 4.206999778747559 | 11.489999771118164 | 1.3600000143051147 | 1.524999976158142 | -9.0 |
37.79999923706055 | 37.5 | 25.97170066833496 | 25.963300704956055 | 5.591899871826172 | 36.32529830932617 | 24.04509925842285 | 0.1770000010728836 | 4.179999828338623 | 11.149999618530273 | 1.347000002861023 | 1.5520000457763672 | -9.0 |
38.29999923706055 | 38.0 | 25.948999404907227 | 25.940399169921875 | 5.589300155639648 | 36.32440185546875 | 24.051599502563477 | 0.17900000512599945 | 4.160999774932861 | 10.84000015258789 | 1.3339999914169312 | 1.5750000476837158 | -9.0 |
38.79999923706055 | 38.5 | 25.929100036621094 | 25.920400619506836 | 5.587200164794922 | 36.32440185546875 | 24.05780029296875 | 0.20600000023841858 | 4.140999794006348 | 10.470000267028809 | 1.319000005722046 | 1.5850000381469727 | -9.0 |
39.29999923706055 | 39.0 | 25.91830062866211 | 25.909500122070312 | 5.585999965667725 | 36.32400131225586 | 24.06089973449707 | 0.2540000081062317 | 4.131999969482422 | 9.970000267028809 | 1.2979999780654907 | 1.5399999618530273 | -9.0 |
39.79999923706055 | 39.5 | 25.915000915527344 | 25.906099319458008 | 5.585599899291992 | 36.323699951171875 | 24.061800003051758 | 0.22300000488758087 | 4.125999927520752 | 9.630000114440918 | 1.2829999923706055 | 1.5360000133514404 | -9.0 |
40.29999923706055 | 40.0 | 25.910400390625 | 25.901399612426758 | 5.585100173950195 | 36.32350158691406 | 24.063199996948242 | 0.17800000309944153 | 4.122000217437744 | 9.199999809265137 | 1.2630000114440918 | 1.531999945640564 | -9.0 |
40.79999923706055 | 40.5 | 25.90760040283203 | 25.898500442504883 | 5.584799766540527 | 36.322898864746094 | 24.063600540161133 | 0.05700000002980232 | 4.113999843597412 | 8.890000343322754 | 1.2480000257492065 | 1.5449999570846558 | -9.0 |
In total, there are 77 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.