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ERDDAP > griddap > Make A Graph ?

Dataset Title:  ROMS Real Time Nowcasting   RSS
Institution:  Scripps Institution of Oceanography, UC San Diego   (Dataset ID: roms_ncst)
Information:  Summary ? | License ? | FGDC | ISO 19115 | Metadata | Background (external link) | Data Access Form | Files
 
Graph Type:  ?
X Axis:  ?
Y Axis:  ?
Color:  ?
 
Dimensions ?    Start ?    Stop ?
time (UTC) ?     specify just 1 value →
    |< -
< <
depth (m) ?     specify just 1 value →
    |< -
< <
latitude (degrees_north) ?
    +
    -
< slider >
longitude (degrees_east) ?
    +
    -
< slider >
 
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:

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.4267952e+9, 1.6343532e+9;
    String axis "T";
    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";
  }
  depth {
    String _CoordinateAxisType "Height";
    String _CoordinateZisPositive "down";
    Float64 actual_range 0.0, 1000.0;
    String axis "Z";
    String ioos_category "Location";
    String long_name "Depth";
    String positive "down";
    String standard_name "depth";
    String units "m";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float32 actual_range 31.3, 43.0;
    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 232.5, 243.0;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  temp {
    Float64 colorBarMaximum 32.0;
    Float64 colorBarMinimum -2.0;
    String ioos_category "Temperature";
    String long_name "Temperature";
    Float64 missing_value -9999.0;
    String units "degree_C";
  }
  salt {
    Float64 colorBarMaximum 37.0;
    Float64 colorBarMinimum 32.0;
    String ioos_category "Salinity";
    String long_name "Salinity";
    Float32 missing_value -9999.0;
    String standard_name "sea_water_practical_salinity";
    String units "PSU";
  }
  u {
    String ioos_category "Currents";
    String long_name "Zonal Current";
    Float64 missing_value -9999.0;
    String units "m/s\"";
  }
  v {
    String ioos_category "Currents";
    String long_name "Meridional Current";
    Float64 missing_value -9999.0;
    String units "m/s\"";
  }
  NC_GLOBAL {
    String cdm_data_type "Grid";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    Float64 Easternmost_Easting 243.0;
    String fileid "SOUTH CALIFORNIA BIGHT";
    Float64 geospatial_lat_max 43.0;
    Float64 geospatial_lat_min 31.3;
    Float64 geospatial_lat_resolution 0.03;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 243.0;
    Float64 geospatial_lon_min 232.5;
    Float64 geospatial_lon_resolution 0.03;
    String geospatial_lon_units "degrees_east";
    String history 
"Sat Oct 16 02:28:52 2021: ncatted -O -atitle,global,o,c,CA-2021101603 ca_subCA_das_2021101603.nc
2021-10-17T12:24:38Z (local files)
2021-10-17T12:24:38Z http://erddap.sccoos.org/griddap/roms_ncst.das";
    String infoUrl "https://sccoos.org/roms-model-output";
    String institution "Scripps Institution of Oceanography, UC San Diego";
    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 4.8.1 (Homepage = http://nco.sf.net, Code = https://github.com/nco/nco)";
    Float64 Northernmost_Northing 43.0;
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 31.3;
    String standard_name_vocabulary "CF Standard Name Table v29";
    String summary "SCB 20120923. Data from a local source.";
    String time_coverage_end "2021-10-16T03:00:00Z";
    String time_coverage_start "2015-03-19T20:00:00Z";
    String title "ROMS Real Time Nowcasting";
    String type "ROMS REAL TIME FORECASTING";
    Float64 Westernmost_Easting 232.5;
  }
}

 

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://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.


 
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