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Dataset Title:  Top Dataset, PDSI, b.e11.B20TRC5CNBDRD.f09 g16.001.clm2.h0.PSDI coeff.K1.K
final.195001-199912 [month][lat][lon]
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Institution:  NOAA ESRL   (Dataset ID: noaa_esrl_2f79_d14d_d227)
Information:  Summary ? | License ? | FGDC | Metadata | Background (external link) | Data Access Form
 
Graph Type:  ?
X Axis:  ?
Y Axis:  ?
Color:  ?
 
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month ?     specify just 1 value →
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latitude (degrees_north) ?
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longitude (degrees_east) ?
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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:

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
  month {
    Int32 actual_range 0, 11;
    String ioos_category "Time";
    String long_name "Month";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float32 _FillValue 1.0e+36;
    Float32 actual_range -90.0, 90.0;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Latitude";
    Float32 missing_value 1.0e+36;
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float32 _FillValue 1.0e+36;
    Float32 actual_range 0.0, 358.75;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    Float32 missing_value 1.0e+36;
    String standard_name "longitude";
    String units "degrees_east";
  }
  alpha {
    Float32 _FillValue 1.0e+36;
    String cell_methods "time: mean";
    String info "function clmMonTLL: contributed.ncl";
    String ioos_category "Time";
    String long_name "Potential ET";
    Float32 missing_value 1.0e+36;
    String time_op_ncl "Climatology: 50 years";
    String units "mm/day";
  }
  beta {
    Float32 _FillValue 1.0e+36;
    String average_op_ncl "dim_avg_wgt_n over dimension(s): levgrnd";
    String cell_methods "time: mean";
    String info "function clmMonTLL: contributed.ncl";
    String ioos_category "Soils";
    String long_name "volumetric soil water (vegetated landunits only)";
    Float32 missing_value 1.0e+36;
    String time_op_ncl "Climatology: 50 years";
    String units "mm3/mm3";
  }
  gama {
    Float32 _FillValue 1.0e+36;
    String cell_methods "time: mean";
    String info "function clmMonTLL: contributed.ncl";
    String ioos_category "Hydrology";
    String long_name "total liquid runoff (does not include QSNWCPICE)";
    Float32 missing_value 1.0e+36;
    String time_op_ncl "Climatology: 50 years";
    String units "mm/s";
  }
  delta {
    Float32 _FillValue 1.0e+36;
    String average_op_ncl "dim_avg_wgt_n over dimension(s): levgrnd";
    String cell_methods "time: mean";
    String info "function clmMonTLL: contributed.ncl";
    String ioos_category "Time";
    String long_name "Potential ET";
    Float32 missing_value 1.0e+36;
    String time_op_ncl "Climatology: 50 years";
    String units "mm/day";
  }
  K1 {
    Float32 _FillValue -9999.0;
    String cell_methods "time: mean";
    String info "function clmMonTLL: contributed.ncl";
    String ioos_category "Time";
    String long_name "Potential ET";
    Float32 missing_value 1.0e+36;
    String time_op_ncl "Climatology: 50 years";
    String units "mm/day";
  }
  K_final_dr {
    Float32 _FillValue -9999.0;
    String cell_methods "time: mean";
    String info "function clmMonTLL: contributed.ncl";
    String ioos_category "Time";
    String long_name "Potential ET";
    Float32 missing_value 1.0e+36;
    String time_op_ncl "Climatology: 50 years";
    String units "mm/day";
  }
  K_final_wt {
    Float32 _FillValue -9999.0;
    String cell_methods "time: mean";
    String info "function clmMonTLL: contributed.ncl";
    String ioos_category "Time";
    String long_name "Potential ET";
    Float32 missing_value 1.0e+36;
    String time_op_ncl "Climatology: 50 years";
    String units "mm/day";
  }
  NC_GLOBAL {
    String cdm_data_type "Grid";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String creator_email "esrl.psd.data@noaa.gov";
    String creator_name "NOAA ESRL PSD";
    String creator_type "institution";
    String creator_url "https://www.esrl.noaa.gov/psd/";
    Float64 Easternmost_Easting 358.75;
    Float64 geospatial_lat_max 90.0;
    Float64 geospatial_lat_min -90.0;
    Float64 geospatial_lat_resolution 0.9424083769633508;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 358.75;
    Float64 geospatial_lon_min 0.0;
    Float64 geospatial_lon_resolution 1.25;
    String geospatial_lon_units "degrees_east";
    String history 
"2018-04-21T08:03:47Z https://www.esrl.noaa.gov/psd/thredds/dodsC/Datasets/SERDP_regimeshifts/data/CESM-LE/PDSI/b.e11.B20TRC5CNBDRD.f09_g16.001.clm2.h0.PSDI_coeff.K1.K_final.195001-199912.nc
2018-04-21T08:03:47Z http://upwell.pfeg.noaa.gov/griddap/noaa_esrl_2f79_d14d_d227.das";
    String id "Datasets/SERDP_regimeshifts/data/CESM-LE/PDSI/b.e11.B20TRC5CNBDRD.f09_g16.001.clm2.h0.PSDI_coeff.K1.K_final.195001-199912.nchttps://www.esrl.noaa.gov/psd/thredds/dodsC/Datasets/SERDP_regimeshifts/data/CESM-LE/PDSI/b.e11.B20TRC5CNBDRD.f09_g16.001.clm2.h0.PSDI_coeff.K1.K_final.195001-199912.nc";
    String infoUrl "https://www.esrl.noaa.gov/psd/thredds/dodsC/Datasets/SERDP_regimeshifts/data/CESM-LE/PDSI/b.e11.B20TRC5CNBDRD.f09_g16.001.clm2.h0.PSDI_coeff.K1.K_final.195001-199912.nc.html";
    String institution "NOAA ESRL";
    String keywords "alpha, b.e11.b20trc5cnbdrd.f09, beta, coeff.k1.k, data, dataset, delta, drought, earth, esrl, final.195001, final.195001-199912, g16.001.clm2.h0.psdi, gama, hydrology, include, index, K_final_dr, K_final_wt, laboratory, landunits, latitude, liquid, longitude, month, noaa, not, only, palmer, pdsi, potential, qsnwcpice, research, runoff, severity, soil, soils, system, time, top, total, vegetated, volumetric, water";
    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.";
    Float64 Northernmost_Northing 90.0;
    String sourceUrl "https://www.esrl.noaa.gov/psd/thredds/dodsC/Datasets/SERDP_regimeshifts/data/CESM-LE/PDSI/b.e11.B20TRC5CNBDRD.f09_g16.001.clm2.h0.PSDI_coeff.K1.K_final.195001-199912.nc";
    Float64 Southernmost_Northing -90.0;
    String standard_name_vocabulary "CF Standard Name Table v29";
    String summary "Top Dataset, Palmer Drought Severity Index (PDSI), b.e11.B20TRC5CNBDRD.f09 g16.001.clm2.h0.PSDI coeff.K1.K final.195001-199912";
    String title "Top Dataset, PDSI, b.e11.B20TRC5CNBDRD.f09 g16.001.clm2.h0.PSDI coeff.K1.K final.195001-199912 [month][lat][lon]";
    Float64 Westernmost_Easting 0.0;
  }
}

 

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.

griddap request URLs must be in the form
https://upwell.pfeg.noaa.gov/erddap/griddap/datasetID.fileType{?query}
For example,
https://upwell.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.


 
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