Make A Graph

Dataset Title:	OCI L3 SMI, PACE MOANA DAILY; via Atlantic OceanWatch at NOAA/AOML, 4km, 2024- present
Institution:	Atlantic OceanWatch at NOAA/AOML (Dataset ID: noaa_aoml_9f9d_930a_255d)
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Data Access Form

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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:

(Please be patient. It may take a while to get the data.)

Optional:
Then set the File Type: (File Type information)
and

or view the URL:
(Documentation / Bypass this form

)

Click on the map to specify a new center point.

Zoom:

[The graph you specified. Please be patient.]

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 {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.712664e+9, 1.745496e+9;
    String axis "T";
    String calendar "gregorian";
    String ioos_category "Time";
    String long_name "Center time of 1-day period";
    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";
    Float32 actual_range -69.97917, 69.97916;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
    Float32 valid_max 90.0;
    Float32 valid_min -90.0;
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float32 actual_range -84.97916, 24.97917;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
    Float32 valid_max 180.0;
    Float32 valid_min -180.0;
  }
  prococcus_moana {
    Int32 _ChunkSizes 1, 1680, 1320;
    Float32 _FillValue NaN;
    Float64 colorBarMaximum 800000.0;
    Float64 colorBarMinimum 0.0;
    Float32 display_max 500000.0;
    Float32 display_min 0.0;
    String display_scale "linear";
    String ioos_category "Ocean Color";
    String long_name "cell abundances of Prochlorococcus";
    String reference "Lange et al. (2020). Radiometric approach for the detection of picophytoplankton assemblages across oceanic fronts. Optics Express, 28, 25682-25705, doi.org/10.1364/OE.398127";
    String units "cells ml^-1";
    Float32 valid_max 600000.0;
    Float32 valid_min 0.0;
  }
  syncoccus_moana {
    Int32 _ChunkSizes 1, 1680, 1320;
    Float32 _FillValue NaN;
    Float64 colorBarMaximum 400000.0;
    Float64 colorBarMinimum 0.0;
    Float32 display_max 150000.0;
    Float32 display_min 0.0;
    String display_scale "log";
    String ioos_category "Ocean Color";
    String long_name "cell abundances of Synechococcus";
    String reference "Lange et al. (2020). Radiometric approach for the detection of picophytoplankton assemblages across oceanic fronts. Optics Express, 28, 25682-25705, doi.org/10.1364/OE.398127";
    String units "cells ml^-1";
    Float32 valid_max 300000.0;
    Float32 valid_min 0.0;
  }
  picoeuk_moana {
    Int32 _ChunkSizes 1, 1680, 1320;
    Float32 _FillValue NaN;
    Float64 colorBarMaximum 50000.0;
    Float64 colorBarMinimum 0.0;
    Float32 display_max 30000.0;
    Float32 display_min 0.0;
    String display_scale "log";
    String ioos_category "Ocean Color";
    String long_name "cell abundances of picoeukaryotes";
    String reference "Lange et al. (2020). Radiometric approach for the detection of picophytoplankton assemblages across oceanic fronts. Optics Express, 28, 25682-25705, doi.org/10.1364/OE.398127";
    String units "cells ml^-1";
    Float32 valid_max 40000.0;
    Float32 valid_min 0.0;
  }
  NC_GLOBAL {
    String _lastModified "2025-04-24T01:35:10.000Z";
    String cdm_data_type "Grid";
    String comment "This dataset is redistributed by Atlantic OceanWatch at NOAA/AOML, originally produced by NASA/GSFC/OBPG.";
    String Conventions "CF-1.10, ACDD-1.3, COARDS";
    String creator_email "data@oceancolor.gsfc.nasa.gov";
    String creator_name "NASA/GSFC/OBPG";
    String creator_url "https://oceandata.sci.gsfc.nasa.gov";
    Int32 data_bins 755877;
    Float32 data_maximum NaN;
    Float32 data_minimum NaN;
    String date_created "2025-04-24T01:35:10.000Z";
    Float64 Easternmost_Easting 24.97917;
    Float32 easternmost_longitude 25.0;
    Int32 end_orbit_number 0;
    Float64 geospatial_lat_max 69.97916;
    Float64 geospatial_lat_min -69.97917;
    Float64 geospatial_lat_resolution 0.04166666567430782;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 24.97917;
    Float64 geospatial_lon_min -84.97916;
    Float64 geospatial_lon_resolution 0.04166666540356195;
    String geospatial_lon_units "degrees_east";
    String history 
"l3mapgen par=PACE_OCI.20250423.L3m.DAY.MOANA.V3_0.4km.NRT.nc.param ; reformatted by Atlantic OceanWatch at NOAA/AOML on 2025-05-03T20:19:40.717618
2025-05-07T05:10:41Z https://cwcgom.aoml.noaa.gov/thredds/dodsC/PACE_MOANA_DAILY/PACE_MOANA_DAILY.nc
2025-05-07T05:10:41Z http://cwcgom.aoml.noaa.gov:8080/griddap/noaa_aoml_9f9d_930a_255d.das";
    String id "3.0/L3/PACE_OCI.20250423.L3b.DAY.MOANA.V3_0.NRT.nc";
    String identifier_product_doi "10.5067/PACE/OCI/L3M/MOANA/3.0";
    String identifier_product_doi_authority "https://dx.doi.org";
    String infoUrl "https://cwcgom.aoml.noaa.gov/thredds/dodsC/PACE_MOANA_DAILY/PACE_MOANA_DAILY.nc.html";
    String institution "Atlantic OceanWatch at NOAA/AOML";
    String instrument "OCI";
    String keywords "abundances, aoml, atlantic, cell, color, daily, data, day, image, L3, laboratory, latitude, level, level-3, longitude, mapped, meteorological, moana, nasa, noaa, ocean, ocean color, oceanographic, oceanwatch, oci, pace, phytoplankton, picoeuk_moana, picoeukaryotes, prochlorococcus, prococcus_moana, smi, standard, syncoccus_moana, synechococcus, time, via";
    String l2_flag_names "ATMFAIL,LAND,HILT,HISATZEN,STRAYLIGHT,CLDICE,COCCOLITH,LOWLW,CHLWARN,CHLFAIL,NAVWARN,MAXAERITER,HISOLZEN,NAVFAIL,FILTER,HIGLINT,~GEOREGION";
    Float32 latitude_step 0.041666668;
    String latitude_units "degrees_north";
    String license "https://science.nasa.gov/earth-science/earth-science-data/data-information-policy/";
    Float32 longitude_step 0.041666668;
    String longitude_units "degrees_east";
    String map_projection "Equidistant Cylindrical";
    String measure "Mean";
    String naming_authority "gov.nasa.gsfc.sci.oceandata";
    Float32 northernmost_latitude 70.0;
    Float64 Northernmost_Northing 69.97916;
    Int32 number_of_columns 2640;
    Int32 number_of_lines 3360;
    String platform "PACE";
    String processing_level "L3 Mapped";
    String processing_version "3.0";
    String product_name "PACE_OCI.20250423.L3m.DAY.MOANA.V3_0.4km.NRT.nc";
    String project "Ocean Biology Processing Group (NASA/GSFC/OBPG)";
    String publisher_email "data@oceancolor.gsfc.nasa.gov";
    String publisher_name "NASA/GSFC/OBPG";
    String publisher_url "https://oceandata.sci.gsfc.nasa.gov";
    String source "satellite observations from OCI-PACE";
    String sourceUrl "https://cwcgom.aoml.noaa.gov/thredds/dodsC/PACE_MOANA_DAILY/PACE_MOANA_DAILY.nc";
    Float32 southernmost_latitude -70.0;
    Float64 Southernmost_Northing -69.97917;
    String spatialResolution "4.638312 km";
    String standard_name_vocabulary "CF Standard Name Table v36";
    Int32 start_orbit_number 0;
    String suggested_image_scaling_applied "No";
    Float32 suggested_image_scaling_maximum 500000.0;
    Float32 suggested_image_scaling_minimum 0.0;
    String suggested_image_scaling_type "LINEAR";
    String summary "Daily composite of PACE OCI MOANA data for picophytoplankton abundances, redistributed by Atlantic OceanWatch";
    Float32 sw_point_latitude -69.979164;
    Float32 sw_point_longitude -84.979164;
    String temporal_range "9-hour";
    String time_coverage_end "2025-04-24T12:00:00Z";
    String time_coverage_start "2024-04-09T12:00:00Z";
    String title "OCI L3 SMI, PACE MOANA DAILY; via Atlantic OceanWatch at NOAA/AOML, 4km, 2024-present";
    Float64 Westernmost_Easting -84.97916;
    Float32 westernmost_longitude -85.0;
  }
}

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.