National Oceanic and Atmospheric Administration ERDDAP at NOAA CoastWatch
Easier access to scientific data
NOAA CoastWatch
Central Operations
NOAA CoastWatch OceanWatch PolarWatch

ERDDAP > griddap > Make A Graph ?

Dataset Title:  ZZ Special Project Copernicus Program S-3A OLCI Chlorophyll and Reflectance
for Puerto Rico 2017-2019 ZZ
  RSS
Institution:  Copernicus Program   (Dataset ID: noaacwSpecialProject1)
Information:  Summary ? | License ? | FGDC | ISO 19115 | Metadata | Background | Data Access Form
 
Graph Type:  ?
X Axis:  ?
Y Axis:  ?
Color:  ?
 
Dimensions ?    Start ?    Stop ?
time (UTC) ?     specify just 1 value →
    |< - >|
< <
level (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 1.4990070861434999e+9, 1.5670885723705e+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";
  }
  level {
    Float64 actual_range 0.0, 0.0;
    String ioos_category "Location";
    String long_name "Altitude";
    String positive "up";
    String standard_name "altitude";
    String units "m";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 actual_range 16.681188000000002, 19.750188;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 actual_range -68.01513899999999, -64.94613899999999;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  CHL_OC4ME {
    String cell_methods "area: mean";
    String grid_mapping "coord_ref";
    String ioos_category "Unknown";
    String long_name "log10 scaled (OC4ME) Algal pigment concentration";
    Float32 missing_value 255.0;
    String units "lg(re mg.m-3)";
  }
  Oa03_reflectance {
    String cell_methods "area: mean";
    String grid_mapping "coord_ref";
    String ioos_category "Optical Properties";
    String long_name "Reflectance for OLCI acquisition band Oa03";
    Float32 missing_value 65535.0;
  }
  Oa06_reflectance {
    String cell_methods "area: mean";
    String grid_mapping "coord_ref";
    String ioos_category "Optical Properties";
    String long_name "Reflectance for OLCI acquisition band Oa06";
    Float32 missing_value 65535.0;
  }
  swath_latitude {
    String cell_methods "area: mean";
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String grid_mapping "coord_ref";
    String ioos_category "Location";
    String long_name "DEM corrected latitude";
    Float64 missing_value NaN;
    String units "degrees_north";
  }
  swath_longitude {
    String cell_methods "area: mean";
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String grid_mapping "coord_ref";
    String ioos_category "Location";
    String long_name "DEM corrected longitude";
    Float64 missing_value NaN;
    String units "degrees_east";
  }
  NC_GLOBAL {
    String cdm_data_type "Grid";
    String Conventions "CF-1.6, COARDS, ACDD-1.3";
    String creator_name "Copernicus Program";
    String creator_type "coastwatch.info@noaa.gov";
    Float64 Easternmost_Easting -64.94613899999999;
    Float64 geospatial_lat_max 19.750188;
    Float64 geospatial_lat_min 16.681188000000002;
    Float64 geospatial_lat_resolution 0.002999999999999999;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -64.94613899999999;
    Float64 geospatial_lon_min -68.01513899999999;
    Float64 geospatial_lon_resolution 0.0030000000000000027;
    String geospatial_lon_units "degrees_east";
    String history 
"[2021-02-05 14:32:25 UTC cwutils-3.5.1.762 20191112_223457 michael.soracco] cwexport --format=netcdf S3A_OL_2_WFR____20190829T142122_PR.nc /data/dmz/pub0012/coastwatch/olci/s3a/S3A_OL_2_WFR____20190829T142122_PR.nc
2021-07-27T14:49:45Z (local files)
2021-07-27T14:49:45Z https://coastwatch.noaa.gov/griddap/noaacwSpecialProject1.das";
    String infoUrl "https://coastwatch.noaa.gov";
    String institution "Copernicus Program";
    String keywords "acquisition, algal, band, CHL_OC4ME, concentration, copernicus, corrected, data, dem, digital, elevation, latitude, level, local, log10, longitude, model, oa03, Oa03_reflectance, oa06, Oa06_reflectance, oc4me, olci, optical, optical properties, pigment, program, properties, reflectance, scaled, source, time";
    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 19.750188;
    String source "SENTINEL3A_OLCI";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 16.681188000000002;
    String standard_name_vocabulary "CF Standard Name Table v29";
    String summary "Copernicus Program select products for Puerto Rico";
    String time_coverage_end "2019-08-29T14:22:52Z";
    String time_coverage_start "2017-07-02T14:51:26Z";
    String title "ZZ Special Project Copernicus Program S-3A OLCI Chlorophyll and Reflectance for Puerto Rico 2017-2019 ZZ";
    Float64 Westernmost_Easting -68.01513899999999;
  }
}

 

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.


 

ERDDAP, Version 2.12
Disclaimers

Privacy | Customer Survey | Contact Us
Information Quality FOIA Disclaimer
USA.gov Department of Commerce
National Oceanic & Atmospheric Administration
Center for Satellite Applications and Research
Satellite Oceanography & Climatology Division