Make A Graph

Dataset Title:	Weather Research and Forecasting (WRF) Regional Atmospheric Model: Guam
Institution:	Pacific Islands Ocean Observing System (PacIOOS) (Dataset ID: wrf_guam)
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:

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Then set the File Type: (File Type information)
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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 {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.3712112e+9, 1.7306784e+9;
    String axis "T";
    String calendar "proleptic_gregorian";
    String ioos_category "Time";
    String long_name "Forecast time for ForecastModelRunCollection";
    Float64 missing_value NaN;
    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 11.93188, 15.9786;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float32 actual_range 142.9017, 147.0725;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  Tair {
    Int32 _ChunkSizes 1, 148, 148;
    Float64 colorBarMaximum 32.0;
    Float64 colorBarMinimum 22.0;
    String coordinates "time_run time lat lon";
    String ioos_category "Temperature";
    String long_name "air temperature at 2m";
    String standard_name "air_temperature";
    String time "time";
    String units "Celsius";
  }
  Uwind {
    Int32 _ChunkSizes 1, 148, 148;
    Float64 colorBarMaximum 20.0;
    Float64 colorBarMinimum -20.0;
    String coordinates "time_run time lat lon";
    String ioos_category "Wind";
    String long_name "u-wind component at 10m";
    String standard_name "eastward_wind";
    String time "time";
    String units "meter second-1";
  }
  Vwind {
    Int32 _ChunkSizes 1, 148, 148;
    Float64 colorBarMaximum 20.0;
    Float64 colorBarMinimum -20.0;
    String coordinates "time_run time lat lon";
    String ioos_category "Wind";
    String long_name "v-wind component at 10m";
    String standard_name "northward_wind";
    String time "time";
    String units "meter second-1";
  }
  rain {
    Int32 _ChunkSizes 1, 148, 148;
    Float32 colorBarMaximum 0.005;
    Float32 colorBarMinimum 0.0;
    String coordinates "time_run time lat lon";
    String ioos_category "Meteorology";
    String long_name "rainfall rate";
    String standard_name "precipitation_flux";
    String time "time";
    String units "kilogram meter-2 second-1";
  }
  Qair {
    Int32 _ChunkSizes 1, 148, 148;
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 0.0;
    String coordinates "time_run time lat lon";
    String ioos_category "Meteorology";
    String long_name "surface air relative humidity";
    String standard_name "relative_humidity";
    String time "time";
    String units "%";
  }
  Pair {
    Int32 _ChunkSizes 1, 148, 148;
    String _CoordinateAxisType "Pressure";
    Float64 colorBarMaximum 1025.0;
    Float64 colorBarMinimum 625.0;
    String coordinates "time_run time lat lon";
    String ioos_category "Pressure";
    String long_name "surface air pressure";
    String standard_name "surface_air_pressure";
    String time "time";
    String units "millibar";
  }
  lwrad_down {
    Int32 _ChunkSizes 1, 148, 148;
    Float64 colorBarMaximum 500.0;
    Float64 colorBarMinimum 100.0;
    String coordinates "time_run time lat lon";
    String ioos_category "Meteorology";
    String long_name "net longwave radiation flux";
    String negative_value "upward flux, cooling";
    String positive_value "downward flux, heating";
    String standard_name "surface_net_downward_longwave_flux";
    String time "time";
    String units "Watts meter-2";
  }
  swrad {
    Int32 _ChunkSizes 1, 148, 148;
    Float64 colorBarMaximum 1200.0;
    Float64 colorBarMinimum 0.0;
    String coordinates "time_run time lat lon";
    String ioos_category "Meteorology";
    String long_name "solar shortwave radiation flux";
    String negative_value "upward flux, cooling";
    String positive_value "downward flux, heating";
    String standard_name "surface_downwelling_shortwave_flux";
    String time "time";
    String units "Watts meter-2";
  }
  NC_GLOBAL {
    String _CoordSysBuilder "ucar.nc2.dataset.conv.CF1Convention";
    String acknowledgement "The Pacific Islands Ocean Observing System (PacIOOS) is funded through the National Oceanic and Atmospheric Administration (NOAA) as a Regional Association within the U.S. Integrated Ocean Observing System (IOOS). PacIOOS is coordinated by the University of Hawaii School of Ocean and Earth Science and Technology (SOEST).";
    String cdm_data_type "Grid";
    String comment "Model runs produced by Yi-Leng Chen (yileng@hawaii.edu).";
    String Conventions "CF-1.6, ACDD-1.3";
    String creator_email "yileng@hawaii.edu";
    String creator_institution "University of Hawaii at Manoa";
    String creator_name "Yi-Leng Chen";
    String creator_type "person";
    String creator_url "https://www.soest.hawaii.edu/MET/Faculty/chen/chen_index.html";
    String date_created "2013-06-14";
    String date_issued "2013-06-14";
    String date_metadata_modified "2021-03-25";
    String date_modified "2017-08-01";
    String drawLandMask "under";
    Float64 Easternmost_Easting 147.0725;
    String geospatial_bounds "POLYGON ((11.9319 142.902, 15.9786 142.902, 15.9786 147.073, 11.9319 147.073, 11.9319 142.902))";
    String geospatial_bounds_crs "EPSG:4326";
    Float64 geospatial_lat_max 15.9786;
    Float64 geospatial_lat_min 11.93188;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 147.0725;
    Float64 geospatial_lon_min 142.9017;
    Float64 geospatial_lon_resolution 0.028372789115646162;
    String geospatial_lon_units "degrees_east";
    String history 
"2013-06-14T00:00:00Z Native curvilinear WRF re-gridded to regular grid by PacIOOS (M. Hsu).
2017-08-23T00:00:00Z Native curvilinear WRF now re-gridded to regular grid by PacIOOS ROMS group (D. Partridge). ;
FMRC Best Dataset
2024-10-30T20:47:33Z https://pae-paha.pacioos.hawaii.edu/thredds/dodsC/wrf_guam/WRF_Guam_Regional_Atmospheric_Model_best.ncd
2024-10-30T20:47:33Z https://pae-paha.pacioos.hawaii.edu/griddap/wrf_guam.das";
    String id "wrf_guam";
    String infoUrl "https://www.soest.hawaii.edu/MET/Faculty/wrf/arw/";
    String institution "Pacific Islands Ocean Observing System (PacIOOS)";
    String instrument "Not Applicable > Not Applicable";
    String instrument_vocabulary "GCMD Instrument Keywords";
    String ISO_Topic_Categories "climatologyMeteorologyAtmosphere";
    String keywords "Earth Science > Atmosphere > Atmospheric Pressure > Surface Pressure, Earth Science > Atmosphere > Atmospheric Radiation > Longwave Radiation, Earth Science > Atmosphere > Atmospheric Radiation > Shortwave Radiation, Earth Science > Atmosphere > Atmospheric Temperature > Surface Air Temperature, Earth Science > Atmosphere > Atmospheric Water Vapor > Humidity, Earth Science > Atmosphere > Atmospheric Winds > Surface Winds, Earth Science > Atmosphere > Precipitation > Rain, Earth Science Services > Models > Weather Research/Forecast Models";
    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, University of Hawaii, PacIOOS, NOAA, State of Hawaii 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 location "Proto fmrc:WRF_Guam_Regional_Atmospheric_Model";
    String locations "Ocean > Pacific Ocean > Western Pacific Ocean > Micronesia > Guam, Ocean > Pacific Ocean > Western Pacific Ocean > Micronesia > Northern Mariana Islands > Commonwealth of the Northern Mariana Islands (CNMI)";
    String locations_vocabulary "GCMD Location Keywords";
    String metadata_link "https://www.pacioos.hawaii.edu/metadata/wrf_guam.html";
    String naming_authority "org.pacioos";
    String NCO "netCDF Operators version 4.9.1 (Homepage = http://nco.sf.net, Code = https://github.com/nco/nco)";
    Float64 Northernmost_Northing 15.9786;
    String platform "Models/Analyses > > Operational Models";
    String platform_vocabulary "GCMD Platform Keywords";
    String program "Pacific Islands Ocean Observing System (PacIOOS)";
    String project "Pacific Islands Ocean Observing System (PacIOOS)";
    String publisher_email "info@pacioos.org";
    String publisher_institution "Pacific Islands Ocean Observing System (PacIOOS)";
    String publisher_name "Pacific Islands Ocean Observing System (PacIOOS)";
    String publisher_type "institution";
    String publisher_url "http://www.pacioos.hawaii.edu";
    String references "https://www.mmm.ucar.edu/weather-research-and-forecasting-model; http://www2.mmm.ucar.edu/wrf/users/";
    String source "Advanced Research Weather Research and Forecasting (WRF-ARW) numerical weather prediction model";
    String sourceUrl "https://pae-paha.pacioos.hawaii.edu/thredds/dodsC/wrf_guam/WRF_Guam_Regional_Atmospheric_Model_best.ncd";
    Float64 Southernmost_Northing 11.93188;
    String standard_name_vocabulary "CF Standard Name Table v39";
    String summary "Weather Research and Forecasting (WRF) mesoscale numerical weather prediction model 7-day hourly forecast for the region surrounding the island of Guam at approximately 3-km resolution. Uses the Advanced Research WRF (ARW) dynamical solver developed and maintained by the Mesoscale and Microscale Meteorology Division of the National Center for Atmospheric Research (NCAR). Model runs produced at the University of Hawaii by Yi-Leng Chen.";
    String testOutOfDate "now+4days";
    String time_coverage_end "2024-11-04T00:00:00Z";
    String time_coverage_resolution "PT1H";
    String time_coverage_start "2013-06-14T12:00:00Z";
    String title "Weather Research and Forecasting (WRF) Regional Atmospheric Model: Guam";
    Float64 Westernmost_Easting 142.9017;
  }
}

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.