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ERDDAP > griddap > Make A Graph ?

Dataset Title:  Near Real Time Geostrophic Currents Subscribe RSS
Institution:  CoastWatch Caribb-NOAA AOML   (Dataset ID: miamicurrents)
Information:  Summary ? | License ? | FGDC | ISO 19115 | Metadata | Background (external link) | Data Access Form
 
Graph Type:  ?
X Axis:  ?
Y Axis:  ?
Vector X:  ?
Vector Y:  ?
 
Dimensions ?    Start ?    Stop ?
time (UTC) ?     specify just 1 value →
    << -
< <
latitude (degrees_north) ?
    +
    -
< slider >
longitude (degrees_east) ?
    +
    -
< slider >
 
Graph Settings
Color: 
Vector Standard: 
Y Axis Minimum:   Maximum:   Ascending: 
 
(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 1.4673312e+9, 1.5242688e+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";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float32 actual_range -64.7, 64.7;
    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 -179.9, 179.9;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  u_current {
    Float32 _FillValue NaN;
    Float32 actual_range -2.2583, 2.3402;
    Float64 colorBarMaximum 0.4;
    Float64 colorBarMinimum -0.4;
    String coordsys "geographic";
    String ioos_category "Currents";
    String long_name "Eastward Sea Water Velocity";
    String standard_name "eastward_sea_water_velocity";
    String units "m/s";
    String variable_info "Eastward Sea Water Velocity";
  }
  v_current {
    Float32 _FillValue NaN;
    Float32 actual_range -2.4805, 2.4761;
    Float64 colorBarMaximum 0.4;
    Float64 colorBarMinimum -0.4;
    String coordsys "geographic";
    String ioos_category "Currents";
    String long_name "Northward Sea Water Velocity";
    String standard_name "northward_sea_water_velocity";
    String units "m/s";
    String variable_info "Northward Sea Water Velocity";
  }
  NC_GLOBAL {
    String cdm_data_type "Grid";
    Int16 cols 1800;
    String contact "Joaquin.Trinanes@noaa.gov";
    String Conventions "COARDS, CF-1.0, Unidata Dataset Discovery v1.0";
    String data_source "Altimeter data, CLimatologies";
    String defaultGraphQuery "&.draw=vectors";
    Float64 Easternmost_Easting 179.9;
    Float32 easternmost_longitude 179.9;
    Float64 geospatial_lat_max 64.7;
    Float64 geospatial_lat_min -64.7;
    Float64 geospatial_lat_resolution 0.2;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 179.9;
    Float64 geospatial_lon_min -179.9;
    Float64 geospatial_lon_resolution 0.2;
    String geospatial_lon_units "degrees_east";
    String history 
"2018-04-22T16:00:29Z http://cwcgom.aoml.noaa.gov/thredds/dodsC/OCEAN_GEOSTROPHIC_CURRENTS/CURRENTS.nc
2018-04-22T16:00:29Z http://coastwatch.pfeg.noaa.gov/griddap/miamicurrents.das";
    String infoUrl "http://www.aoml.noaa.gov/phod/dataphod/work/trinanes/INTERFACE/index.html";
    String institution "CoastWatch Caribb-NOAA AOML";
    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.";
    Int32 nco_openmp_thread_number 1;
    Int32 node_offset 0;
    Float32 northernmost_latitude 69.7;
    Float64 Northernmost_Northing 64.7;
    String origin "CoastWatch, NOAA/AOML";
    String projection "geographic";
    String projection_type "mapped";
    String references "http://www.aoml.noaa.gov/phod/dataphod/work/trinanes/INTERFACE/index.html";
    Int16 rows 648;
    String sourceUrl "http://cwcgom.aoml.noaa.gov/thredds/dodsC/OCEAN_GEOSTROPHIC_CURRENTS/CURRENTS.nc";
    Float32 southernmost_latitude -69.7;
    Float64 Southernmost_Northing -64.7;
    String standard_name_vocabulary "CF-1.0";
    String summary "Near Real Time Geostrophic Currents";
    Float64 temporal_extent 86400.0;
    String temporal_extent_unit "seconds";
    String time_coverage_end "2018-04-21T00:00:00Z";
    String time_coverage_start "2016-07-01T00:00:00Z";
    String title "Near Real Time Geostrophic Currents";
    Float64 Westernmost_Easting -179.9;
    Float32 westernmost_longitude -179.9;
  }
}

 

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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