Make A Graph

Dataset Title:	Standard Deviations of MODIS AQUA products at 9km rolling 30-day resolution
Institution:	University of Delaware (Dataset ID: aqua_std_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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Then set the File Type: (File Type information)
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Click on the map to specify a new center point.

Zoom:

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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 1048576;
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.0257552e+9, 1.2622356e+9;
    String axis "T";
    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 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 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_std_dev {
    UInt32 _ChunkSizes 1, 720, 1440;
    Float32 _FillValue -999.0;
    String cell_methods "time: root_mean_square_nm1";
    String ioos_category "Unknown";
    String long_name "Chl Ocx Std Dev";
    String units "mg m^-3";
  }
  kd_490_std_dev {
    UInt32 _ChunkSizes 1, 720, 1440;
    Float32 _FillValue -999.0;
    String cell_methods "time: root_mean_square_nm1";
    String ioos_category "Unknown";
    String long_name "Kd 490 Std Dev";
    String units "m^-1";
  }
  par_std_dev {
    UInt32 _ChunkSizes 1, 720, 1440;
    Float32 _FillValue -999.0;
    String cell_methods "time: root_mean_square_nm1";
    String ioos_category "Optical Properties";
    String long_name "Par Std Dev";
    String units "einstein m^-2 day^-1";
  }
  poc_std_dev {
    UInt32 _ChunkSizes 1, 720, 1440;
    Float32 _FillValue -999.0;
    String cell_methods "time: root_mean_square_nm1";
    String ioos_category "Ocean Color";
    String long_name "Poc Std Dev";
    String units "mg m^-3";
  }
  sst_std_dev {
    UInt32 _ChunkSizes 1, 720, 1440;
    Float32 _FillValue -999.0;
    String cell_methods "time: root_mean_square_nm1";
    Float64 colorBarMaximum 32.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Temperature";
    String long_name "Sea Surface Temperature";
    String standard_name "sea_surface_temperature";
    String units "degree_C";
  }
  Zeu_lee_std_dev {
    UInt32 _ChunkSizes 1, 720, 1440;
    Float32 _FillValue -999.0;
    String cell_methods "time: root_mean_square_nm1";
    String ioos_category "Unknown";
    String long_name "Zeu Lee Std Dev";
    String units "m";
  }
  Zeu_lee_count {
    UInt32 _ChunkSizes 1, 720, 1440;
    Float32 _FillValue -999.0;
    String cell_methods "time: sum";
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Statistics";
    String long_name "Zeu Lee Count";
    String units "m";
  }
  chl_ocx_count {
    UInt32 _ChunkSizes 1, 720, 1440;
    Float32 _FillValue -999.0;
    String cell_methods "time: sum";
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Statistics";
    String long_name "Chl Ocx Count";
    String units "mg m^-3";
  }
  kd_490_count {
    UInt32 _ChunkSizes 1, 720, 1440;
    Float32 _FillValue -999.0;
    String cell_methods "time: sum";
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Statistics";
    String long_name "Kd 490 Count";
    String units "m^-1";
  }
  par_count {
    UInt32 _ChunkSizes 1, 720, 1440;
    Float32 _FillValue -999.0;
    String cell_methods "time: sum";
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Statistics";
    String long_name "Par Count";
    String units "einstein m^-2 day^-1";
  }
  poc_count {
    UInt32 _ChunkSizes 1, 720, 1440;
    Float32 _FillValue -999.0;
    String cell_methods "time: sum";
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Statistics";
    String long_name "Poc Count";
    String units "mg m^-3";
  }
  sst_count {
    UInt32 _ChunkSizes 1, 720, 1440;
    Float32 _FillValue -999.0;
    String cell_methods "time: sum";
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Statistics";
    String long_name "Sst Count";
    String units "degree_C";
  }
  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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20091130_20091229.nc4_std_dev 20091201_20091230.nc4_std_dev 20091202_20091231.nc4_std_dev ../concat/aqua.2009.nc4
Fri Jul 29 07:55:06 2022: ncks -A /home/1097/workdir/std_dev/data/2009/20081203_20090101.nc4.counts /home/1097/workdir/std_dev/data/2009/20081203_20090101.nc4_std_dev
Fri Jul 29 07:54:36 2022: ncra -y ttl /home/1097/workdir/std_dev/data/2009/20081203_20090101.nc4 /home/1097/workdir/std_dev/data/2009/20081203_20090101.nc4.counts
Fri Jul 29 07:41:52 2022: ncrcat -v chl_ocx,kd_490,par,poc,sst,Zeu_lee /home/1097/workdir/aqua/2009/A2009001.nc4 /home/1097/workdir/aqua/2008/A2008366.nc4 /home/1097/workdir/aqua/2008/A2008365.nc4 /home/1097/workdir/aqua/2008/A2008364.nc4 /home/1097/workdir/aqua/2008/A2008363.nc4 /home/1097/workdir/aqua/2008/A2008362.nc4 /home/1097/workdir/aqua/2008/A2008361.nc4 /home/1097/workdir/aqua/2008/A2008360.nc4 /home/1097/workdir/aqua/2008/A2008359.nc4 /home/1097/workdir/aqua/2008/A2008358.nc4 /home/1097/workdir/aqua/2008/A2008357.nc4 /home/1097/workdir/aqua/2008/A2008356.nc4 /home/1097/workdir/aqua/2008/A2008355.nc4 /home/1097/workdir/aqua/2008/A2008354.nc4 /home/1097/workdir/aqua/2008/A2008353.nc4 /home/1097/workdir/aqua/2008/A2008352.nc4 /home/1097/workdir/aqua/2008/A2008351.nc4 /home/1097/workdir/aqua/2008/A2008350.nc4 /home/1097/workdir/aqua/2008/A2008349.nc4 /home/1097/workdir/aqua/2008/A2008348.nc4 /home/1097/workdir/aqua/2008/A2008347.nc4 /home/1097/workdir/aqua/2008/A2008346.nc4 /home/1097/workdir/aqua/2008/A2008345.nc4 /home/1097/workdir/aqua/2008/A2008344.nc4 /home/1097/workdir/aqua/2008/A2008343.nc4 /home/1097/workdir/aqua/2008/A2008342.nc4 /home/1097/workdir/aqua/2008/A2008341.nc4 /home/1097/workdir/aqua/2008/A2008340.nc4 /home/1097/workdir/aqua/2008/A2008339.nc4 /home/1097/workdir/aqua/2008/A2008338.nc4 /home/1097/workdir/std_dev/data/2009/20081203_20090101.nc4
2025-05-12T09:29:18Z (local files)
2025-05-12T09:29:18Z http://ocean-data.ceoe.udel.edu/griddap/aqua_std_9km_30day.das";
    String history_of_appended_files 
"Fri Jul 29 07:55:06 2022: Appended file /home/1097/workdir/std_dev/data/2009/20081203_20090101.nc4.counts had following \"history\" attribute:
Fri Jul 29 07:54:36 2022: ncra -y ttl /home/1097/workdir/std_dev/data/2009/20081203_20090101.nc4 /home/1097/workdir/std_dev/data/2009/20081203_20090101.nc4.counts
Fri Jul 29 07:41:52 2022: ncrcat -v chl_ocx,kd_490,par,poc,sst,Zeu_lee /home/1097/workdir/aqua/2009/A2009001.nc4 /home/1097/workdir/aqua/2008/A2008366.nc4 /home/1097/workdir/aqua/2008/A2008365.nc4 /home/1097/workdir/aqua/2008/A2008364.nc4 /home/1097/workdir/aqua/2008/A2008363.nc4 /home/1097/workdir/aqua/2008/A2008362.nc4 /home/1097/workdir/aqua/2008/A2008361.nc4 /home/1097/workdir/aqua/2008/A2008360.nc4 /home/1097/workdir/aqua/2008/A2008359.nc4 /home/1097/workdir/aqua/2008/A2008358.nc4 /home/1097/workdir/aqua/2008/A2008357.nc4 /home/1097/workdir/aqua/2008/A2008356.nc4 /home/1097/workdir/aqua/2008/A2008355.nc4 /home/1097/workdir/aqua/2008/A2008354.nc4 /home/1097/workdir/aqua/2008/A2008353.nc4 /home/1097/workdir/aqua/2008/A2008352.nc4 /home/1097/workdir/aqua/2008/A2008351.nc4 /home/1097/workdir/aqua/2008/A2008350.nc4 /home/1097/workdir/aqua/2008/A2008349.nc4 /home/1097/workdir/aqua/2008/A2008348.nc4 /home/1097/workdir/aqua/2008/A2008347.nc4 /home/1097/workdir/aqua/2008/A2008346.nc4 /home/1097/workdir/aqua/2008/A2008345.nc4 /home/1097/workdir/aqua/2008/A2008344.nc4 /home/1097/workdir/aqua/2008/A2008343.nc4 /home/1097/workdir/aqua/2008/A2008342.nc4 /home/1097/workdir/aqua/2008/A2008341.nc4 /home/1097/workdir/aqua/2008/A2008340.nc4 /home/1097/workdir/aqua/2008/A2008339.nc4 /home/1097/workdir/aqua/2008/A2008338.nc4 /home/1097/workdir/std_dev/data/2009/20081203_20090101.nc4
";
    String infoUrl "???";
    String institution "University of Delaware";
    String keywords "available, chl, chl_ocx_count, chl_ocx_std_dev, chlorophyll, color, count, data, depth, dev, earth, Earth Science > Oceans > Ocean Temperature > Sea Surface Temperature, kd_490_count, kd_490_std_dev, lee, local, ocean, ocean color, oceans, ocx, optical, optical properties, par, par_count, par_std_dev, photosynthetically, poc, poc_count, poc_std_dev, profiler, properties, radiation, salinity, salinity-temperature-depth, science, sea, sea_surface_temperature, source, sst, sst_count, sst_std_dev, statistics, std, surface, temperature, time, zeu, Zeu_lee_count, Zeu_lee_std_dev";
    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 "Standard Deviations of MODIS AQUA products at 9km rolling 30-day resolution. Averaging performed by NetCDF Operators";
    String time_coverage_end "2009-12-31T05:00:00Z";
    String time_coverage_start "2002-07-04T04:00:00Z";
    String title "Standard Deviations of MODIS AQUA products at 9km rolling 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.