Make A Graph

Dataset Title:	Averages of SeaWIFS products at 9km 30-day resolution
Institution:	University of Delaware (Dataset ID: seawifs_9km_30day)
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Data Access Form \| Files

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Graph Type:
X Axis:
Y Axis:
Color:

Dimensions

Start

Stop

time (UTC)

specify just 1 value →

latitude (degrees_north)

longitude (degrees_east)

Graph Settings
Color Bar:	Continuity:	Scale:
Minimum:	Maximum:	N Sections:
Draw land mask:
Y Axis Minimum:	Maximum:

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Things You Can Do With Your Graphs

Well, you can do anything you want with your graphs, of course. But some things you might not have considered are:

Web page authors can embed a graph of the latest data in a web page using HTML <img> tags.
Anyone can use ERDDAPs Slide Sorter to build a personal web page that displays graphs with the latest data (or other images or HTML content), each in its own, draggable slide.

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
  time {
    UInt32 _ChunkSizes 1024;
    String _CoordinateAxisType "Time";
    Float64 actual_range 9.467028e+8, 1.2622356e+9;
    String axis "T";
    String calendar "proleptic_gregorian";
    String cell_methods "time: mean";
    String ioos_category "Time";
    String long_name "Time";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 _FillValue NaN;
    Float64 actual_range -89.95833587646484, 89.95833587646484;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 _FillValue NaN;
    Float64 actual_range -179.9583282470703, 179.95835876464844;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  chl_ocx {
    UInt32 _ChunkSizes 1, 1080, 2160;
    Float32 _FillValue -999.0;
    String cell_methods "time: mean";
    String ioos_category "Unknown";
    String long_name "Chl Ocx";
    String units "mg m^-3";
  }
  chlor_a {
    UInt32 _ChunkSizes 1, 1080, 2160;
    Float32 _FillValue -999.0;
    String cell_methods "time: mean";
    Float64 colorBarMaximum 30.0;
    Float64 colorBarMinimum 0.03;
    String colorBarScale "Log";
    String ioos_category "Ocean Color";
    String long_name "Concentration Of Chlorophyll In Sea Water";
    String standard_name "concentration_of_chlorophyll_in_sea_water";
    String units "mg m^-3";
  }
  a_412_giop {
    UInt32 _ChunkSizes 1, 1080, 2160;
    Float32 _FillValue -999.0;
    String cell_methods "time: mean";
    String ioos_category "Unknown";
    String long_name "A 412 Giop";
    String units "m^-1";
  }
  a_443_giop {
    UInt32 _ChunkSizes 1, 1080, 2160;
    Float32 _FillValue -999.0;
    String cell_methods "time: mean";
    String ioos_category "Unknown";
    String long_name "A 443 Giop";
    String units "m^-1";
  }
  a_510_giop {
    UInt32 _ChunkSizes 1, 1080, 2160;
    Float32 _FillValue -999.0;
    String cell_methods "time: mean";
    String ioos_category "Unknown";
    String long_name "A 510 Giop";
    String units "m^-1";
  }
  a_555_giop {
    UInt32 _ChunkSizes 1, 1080, 2160;
    Float32 _FillValue -999.0;
    String cell_methods "time: mean";
    String ioos_category "Unknown";
    String long_name "A 555 Giop";
    String units "m^-1";
  }
  adg_443_giop {
    UInt32 _ChunkSizes 1, 1080, 2160;
    Float32 _FillValue -999.0;
    String cell_methods "time: mean";
    String ioos_category "Unknown";
    String long_name "Adg 443 Giop";
    String units "m^-1";
  }
  adg_s_giop {
    UInt32 _ChunkSizes 1, 1080, 2160;
    Float32 _FillValue -999.0;
    String cell_methods "time: mean";
    String ioos_category "Unknown";
    String long_name "Adg S Giop";
    String units "m^-1 nm^-1";
  }
  aph_443_giop {
    UInt32 _ChunkSizes 1, 1080, 2160;
    Float32 _FillValue -999.0;
    String cell_methods "time: mean";
    String ioos_category "Unknown";
    String long_name "Aph 443 Giop";
    String units "m^-1";
  }
  aph_unc_443_giop {
    UInt32 _ChunkSizes 1, 1080, 2160;
    Float32 _FillValue -999.0;
    String cell_methods "time: mean";
    String ioos_category "Unknown";
    String long_name "Aph Unc 443 Giop";
    String units "m^-1";
  }
  bb_443_giop {
    UInt32 _ChunkSizes 1, 1080, 2160;
    Float32 _FillValue -999.0;
    String cell_methods "time: mean";
    String ioos_category "Unknown";
    String long_name "Bb 443 Giop";
    String units "m^-1";
  }
  bb_510_giop {
    UInt32 _ChunkSizes 1, 1080, 2160;
    Float32 _FillValue -999.0;
    String cell_methods "time: mean";
    String ioos_category "Unknown";
    String long_name "Bb 510 Giop";
    String units "m^-1";
  }
  bb_670_giop {
    UInt32 _ChunkSizes 1, 1080, 2160;
    Float32 _FillValue -999.0;
    String cell_methods "time: mean";
    String ioos_category "Unknown";
    String long_name "Bb 670 Giop";
    String units "m^-1";
  }
  kd_490 {
    UInt32 _ChunkSizes 1, 1080, 2160;
    Float32 _FillValue -999.0;
    String cell_methods "time: mean";
    String ioos_category "Unknown";
    String long_name "KD 490";
    String units "m^-1";
  }
  par {
    UInt32 _ChunkSizes 1, 1080, 2160;
    Float32 _FillValue -999.0;
    String cell_methods "time: mean";
    Float64 colorBarMaximum 70.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Optical Properties";
    String long_name "Downwelling Photosynthetic Photon Radiance In Sea Water";
    String standard_name "downwelling_photosynthetic_photon_radiance_in_sea_water";
    String units "einstein m^-2 day^-1";
  }
  poc {
    UInt32 _ChunkSizes 1, 1080, 2160;
    Float32 _FillValue -999.0;
    String cell_methods "time: mean";
    String ioos_category "Ocean Color";
    String long_name "Particulate Organic Carbon";
    String units "mg m^-3";
  }
  rrs_412 {
    UInt32 _ChunkSizes 1, 1080, 2160;
    Float32 _FillValue -999.0;
    String cell_methods "time: mean";
    String ioos_category "Optical Properties";
    String long_name "RRS 412";
    String units "sr^-1";
  }
  rrs_443 {
    UInt32 _ChunkSizes 1, 1080, 2160;
    Float32 _FillValue -999.0;
    String cell_methods "time: mean";
    String ioos_category "Optical Properties";
    String long_name "RRS 443";
    String units "sr^-1";
  }
  rrs_490 {
    UInt32 _ChunkSizes 1, 1080, 2160;
    Float32 _FillValue -999.0;
    String cell_methods "time: mean";
    String ioos_category "Optical Properties";
    String long_name "RRS 490";
    String units "sr^-1";
  }
  rrs_510 {
    UInt32 _ChunkSizes 1, 1080, 2160;
    Float32 _FillValue -999.0;
    String cell_methods "time: mean";
    String ioos_category "Optical Properties";
    String long_name "RRS 510";
    String units "sr^-1";
  }
  rrs_555 {
    UInt32 _ChunkSizes 1, 1080, 2160;
    Float32 _FillValue -999.0;
    String cell_methods "time: mean";
    String ioos_category "Optical Properties";
    String long_name "RRS 555";
    String units "sr^-1";
  }
  rrs_670 {
    UInt32 _ChunkSizes 1, 1080, 2160;
    Float32 _FillValue -999.0;
    String cell_methods "time: mean";
    String ioos_category "Optical Properties";
    String long_name "RRS 670";
    String units "sr^-1";
  }
  Zeu_lee {
    UInt32 _ChunkSizes 1, 1080, 2160;
    Float32 _FillValue -999.0;
    String cell_methods "time: mean";
    String ioos_category "Unknown";
    String long_name "Zeu Lee";
    String units "m";
  }
  NC_GLOBAL {
    String cdm_data_type "Grid";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    Float64 Easternmost_Easting 179.95835876464844;
    Float64 geospatial_lat_max 89.95833587646484;
    Float64 geospatial_lat_min -89.95833587646484;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 179.95835876464844;
    Float64 geospatial_lon_min -179.9583282470703;
    String geospatial_lon_units "degrees_east";
    String history 
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Wed Nov 24 20:15:09 2021: ncrcat S2002001_2002030.nc4 S2002002_2002031.nc4 S2002003_2002032.nc4 S2002004_2002033.nc4 S2002005_2002034.nc4 S2002006_2002035.nc4 S2002007_2002036.nc4 S2002008_2002037.nc4 S2002009_2002038.nc4 S2002010_2002039.nc4 S2002011_2002040.nc4 S2002012_2002041.nc4 S2002013_2002042.nc4 S2002014_2002043.nc4 S2002015_2002044.nc4 S2002016_2002045.nc4 S2002017_2002046.nc4 S2002018_2002047.nc4 S2002019_2002048.nc4 S2002020_2002049.nc4 S2002021_2002050.nc4 S2002022_2002051.nc4 S2002023_2002052.nc4 S2002024_2002053.nc4 S2002025_2002054.nc4 S2002026_2002055.nc4 S2002027_2002056.nc4 S2002028_2002057.nc4 S2002029_2002058.nc4 S2002030_2002059.nc4 S2002031_2002060.nc4 S2002032_2002061.nc4 S2002033_2002062.nc4 S2002034_2002063.nc4 S2002035_2002064.nc4 S2002036_2002065.nc4 S2002037_2002066.nc4 S2002038_2002067.nc4 S2002039_2002068.nc4 S2002040_2002069.nc4 S2002041_2002070.nc4 S2002042_2002071.nc4 S2002043_2002072.nc4 S2002044_2002073.nc4 S2002045_2002074.nc4 S2002046_2002075.nc4 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S2002329_2002358.nc4 S2002330_2002359.nc4 S2002331_2002360.nc4 S2002332_2002361.nc4 S2002333_2002362.nc4 S2002334_2002363.nc4 S2002335_2002364.nc4 S2002336_2002365.nc4 S2002337_2003001.nc4 S2002338_2003002.nc4 S2002339_2003003.nc4 S2002340_2003004.nc4 S2002341_2003005.nc4 S2002342_2003006.nc4 S2002343_2003007.nc4 S2002344_2003008.nc4 S2002345_2003009.nc4 S2002346_2003010.nc4 S2002347_2003011.nc4 S2002348_2003012.nc4 S2002349_2003013.nc4 S2002350_2003014.nc4 S2002351_2003015.nc4 S2002352_2003016.nc4 S2002353_2003017.nc4 S2002354_2003018.nc4 S2002355_2003019.nc4 S2002356_2003020.nc4 S2002357_2003021.nc4 S2002358_2003022.nc4 S2002359_2003023.nc4 S2002360_2003024.nc4 S2002361_2003025.nc4 S2002362_2003026.nc4 S2002363_2003027.nc4 S2002364_2003028.nc4 S2002365_2003029.nc4 /home/1097/workdir/seawifs_concat/seawifs_30day.2002.concat.nc4
Thu Nov 18 22:17:49 2021: /home/1097/nco/nco-5.0.2/src/nco/.libs/lt-ncra -O S2002030.nc4 S2002029.nc4 S2002028.nc4 S2002027.nc4 S2002026.nc4 S2002025.nc4 S2002024.nc4 S2002023.nc4 S2002022.nc4 S2002021.nc4 S2002020.nc4 S2002019.nc4 S2002018.nc4 S2002017.nc4 S2002016.nc4 S2002015.nc4 S2002014.nc4 S2002013.nc4 S2002012.nc4 S2002011.nc4 S2002010.nc4 S2002009.nc4 S2002008.nc4 S2002007.nc4 S2002006.nc4 S2002005.nc4 S2002004.nc4 S2002003.nc4 S2002002.nc4 S2002001.nc4 ../30day/S2002001_2002030.nc4
2025-05-12T10:06:39Z (local files)
2025-05-12T10:06:39Z http://ocean-data.ceoe.udel.edu/griddap/seawifs_9km_30day.das";
    String infoUrl "???";
    String institution "University of Delaware";
    String keywords "a_412_giop, a_443_giop, a_510_giop, a_555_giop, active, adg, adg_443_giop, adg_s_giop, aph, aph_443_giop, aph_unc_443_giop, available, bb_443_giop, bb_510_giop, bb_670_giop, carbon, chemistry, chl, chl_ocx, chlor_a, chlorophyll, color, concentration, concentration_of_chlorophyll_in_sea_water, data, downwelling, downwelling_photosynthetic_photon_radiance_in_sea_water, earth, Earth Science > Oceans > Ocean Chemistry > Chlorophyll, Earth Science > Oceans > Ocean Optics > Photosynthetically Active Radiation, Earth Science > Oceans > Ocean Optics > Radiance, giop, kd_490, lee, local, ocean, ocean color, oceans, ocx, optical, optical properties, optics, organic, par, particulate, photon, photosynthetic, photosynthetically, poc, properties, radiance, radiation, rrs, rrs_412, rrs_443, rrs_490, rrs_510, rrs_555, rrs_670, science, sea, seawater, source, time, unc, water, zeu, Zeu_lee";
    String keywords_vocabulary "GCMD Science Keywords";
    String license 
"The data may be used and redistributed for free but is not intended
for legal use, since it may contain inaccuracies. Neither the data
Contributor, ERD, NOAA, nor the United States Government, nor any
of their employees or contractors, makes any warranty, express or
implied, including warranties of merchantability and fitness for a
particular purpose, or assumes any legal liability for the accuracy,
completeness, or usefulness, of this information.";
    String NCO "netCDF Operators version 4.7.6 (Homepage = http://nco.sf.net, Code = https://github.com/nco/nco)";
    Float64 Northernmost_Northing 89.95833587646484;
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing -89.95833587646484;
    String standard_name_vocabulary "CF Standard Name Table v70";
    String summary "Averages of SeaWIFS products at 9km 30-day resolution. Averaging performed by NetCDF Operators";
    String time_coverage_end "2009-12-31T05:00:00Z";
    String time_coverage_start "2000-01-01T05:00:00Z";
    String title "Averages of SeaWIFS products at 9km 30-day resolution";
    Float64 Westernmost_Easting -179.9583282470703;
  }
}

Using griddap to Request Data and Graphs from Gridded Datasets

griddap lets you request a data subset, graph, or map from a gridded dataset (for example, sea surface temperature data from a satellite), via a specially formed URL. griddap uses the OPeNDAP (external link)

Data Access Protocol (DAP) (external link)

and its projection constraints (external link)

The URL specifies what you want: the dataset, a description of the graph or the subset of the data, and the file type for the response.

(easy) You can get data by using the dataset's Data Access Form. It makes the URL for you.
(easy) You can make a graph or map by using the dataset's Make A Graph form. It makes the URL for you.
(not hard) You can bypass the forms and get the data or make a graph or map by generating the URL by hand or with a computer program or script.

griddap request URLs must be in the form
https://coastwatch.pfeg.noaa.gov/erddap/griddap/datasetID.fileType{?query}
For example,
https://coastwatch.pfeg.noaa.gov/erddap/griddap/jplMURSST41.htmlTable?analysed_sst[(2002-06-01T09:00:00Z)][(-89.99):1000:(89.99)][(-179.99):1000:(180.0)]
Thus, the query is often a data variable name (e.g., analysed_sst), followed by [(start):stride:(stop)] (or a shorter variation of that) for each of the variable's dimensions (for example, [time][latitude][longitude]).

For details, see the griddap Documentation.