NOAA   ERDDAP   Easier access to scientific data    
Brought to you by NOAA NMFS SFSC ERD    

ERDDAP > griddap > Data Access Form

Dataset Title:  Chlorophyll-a Deviation, Orbview-2 SeaWiFS, West US (8 Day Composite)
Dataset ID:  erdSHcdev8day RSS Subscribe
Institution:  NOAA CoastWatch, West Coast Node
Information:  Summary | Variables | Background | Make A Graph

Dimensions Start Stride Stop  Size    Spacing
time (Centered Time, UTC)      2991    1 day 08:36:46 (uneven)
altitude (m)      1    (just one value)
latitude (degrees_north)      2321    0.0125 (even)
longitude (degrees_east)      3201    0.0125 (even)
 
Grid Variables (which always also download all of the dimension variables)
chl_dev (Deviation of Chlorophyll Concentration In Sea Water, mg m-3)

File type:

This web page works better if JavaScript is enabled. Please:
1) Enable JavaScript in your browser:
   • Windows
      • Firefox: select "Tools : Options : Content : Enable JavaScript : OK"
      • Internet Explorer: select "Tools : Internet Options : Security : Internet : Custom level :
          Sripting/ Active Scripting : Enable : OK : OK"
      • Opera: select "Tools : Quick Preferences : Enable JavaScript"
   • Mac OS X
      • Firefox: select "Firefox : Preferences : Content : Enable JavaScript : OK"
      • Internet Explorer (this is an out-of-date browser -- please consider switching):
          select "Explorer : Preferences : Web Content : Enable Scripting : OK"
      • Opera: select "Opera : Quick Preferences : Enable JavaScript"
      • Safari: select "Safari : Preferences : Security : Enable JavaScript"
2) Reload this web page.
 


 

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 8.865504e+8, 1.2375936e+9;
    String axis "T";
    Int32 fraction_digits 0;
    String ioos_category "Time";
    String long_name "Centered Time";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  altitude {
    String _CoordinateAxisType "Height";
    String _CoordinateZisPositive "up";
    Float64 actual_range 0.0, 0.0;
    String axis "Z";
    Int32 fraction_digits 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 22.0, 51.0;
    String axis "Y";
    String coordsys "geographic";
    Int32 fraction_digits 4;
    String ioos_category "Location";
    String long_name "Latitude";
    String point_spacing "even";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 actual_range 215.0, 255.0;
    String axis "X";
    String coordsys "geographic";
    Int32 fraction_digits 4;
    String ioos_category "Location";
    String long_name "Longitude";
    String point_spacing "even";
    String standard_name "longitude";
    String units "degrees_east";
  }
  chl_dev {
    Float32 _FillValue -9999999.0;
    Float64 colorBarMaximum 5.0;
    Float64 colorBarMinimum -5.0;
    String coordsys "geographic";
    Int32 fraction_digits 2;
    String ioos_category "Ocean Color";
    String long_name "Deviation of Chlorophyll Concentration In Sea Water";
    Float32 missing_value -9999999.0;
    String units "mg m-3";
  }
  NC_GLOBAL {
    String acknowledgement "NOAA NESDIS COASTWATCH, NOAA SWFSC ERD";
    String cdm_data_type "Grid";
    String composite "true";
    String contributor_name "NASA/GSFC/DAAC, NOAA NOS/CoastWatch, GeoEye";
    String contributor_role "Source of level 2 data.";
    String Conventions "COARDS, CF-1.0, Unidata Dataset Discovery v1.0";
    String creator_email "dave.foley@noaa.gov";
    String creator_name "NOAA CoastWatch, West Coast Node";
    String creator_url "http://coastwatch.pfel.noaa.gov";
    String date_created "2009-03-24Z";
    String date_issued "2009-03-24Z";
    Float64 Easternmost_Easting 255.0;
    Float64 geospatial_lat_max 51.0;
    Float64 geospatial_lat_min 22.0;
    Float64 geospatial_lat_resolution 0.0125;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 255.0;
    Float64 geospatial_lon_min 215.0;
    Float64 geospatial_lon_resolution 0.0125;
    String geospatial_lon_units "degrees_east";
    Float64 geospatial_vertical_max 0.0;
    Float64 geospatial_vertical_min 0.0;
    String geospatial_vertical_positive "up";
    String geospatial_vertical_units "m";
    String history 
"NASA/GSFC/DAAC, NOAA NOS/CoastWatch, GeoEye
2009-03-24T14:20:18Z NOAA CoastWatch (West Coast Node) and NOAA SFSC ERD
2009-11-23 http://161.55.17.243:8081/thredds/dodsC/satellite/SH/cdev/8day
2009-11-23 http://coastwatch.pfeg.noaa.gov/erddap/griddap/erdSHcdev8day.das";
    String infoUrl "http://coastwatch.pfeg.noaa.gov/infog/SH_chla_las.html";
    String institution "NOAA CoastWatch, West Coast Node";
    String keywords "EARTH SCIENCE > Oceans > Ocean Chemistry > Chlorophyll";
    String keywords_vocabulary "GCMD Science Keywords";
    String license 
"The data may be used for free but is not intended for 
legal use, since it may contain inaccuracies. Neither the data Contributor, 
CoastWatch, 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. 
Because the data was purchased under a NOAA contract with GeoEye, the data 
can be used but not redistributed.  
Images made from the data, however, can be used for any purpose.  
Questions regarding data access should be directed to NOAA CoastWatch.";
    String naming_authority "gov.noaa.pfel.coastwatch";
    Float64 Northernmost_Northing 51.0;
    String origin "NASA/GSFC/DAAC, NOAA NOS/CoastWatch, GeoEye";
    String processing_level "3";
    String project "CoastWatch (http://coastwatch.noaa.gov/)";
    String projection "geographic";
    String projection_type "mapped";
    String references 
"SeaWiFS information: http://oceancolor.gsfc.nasa.gov/SeaWiFS/ . NASA Ocean 
Color information: http://oceancolor.gsfc.nasa.gov/ . Processing reference: 
O'Reilly, J.E., Maritorena, S., Mitchell, B.G., Siegel, D.A., Carder, K.L., 
Garver, S.A., Kahru, M. and McClain, C. (1998). Ocean color chlorophyll 
algorithms for SeaWiFS. J. Geophys. Res., 103: 24, 937-24, 953. Processing 
reference: O'Reilly, J. E., and 21 others. 2000. Ocean color chlorophyll a 
algorithms for SeaWiFS, OC2 and OC4: Version 5. SeaWiFS Postlaunch 
Calibration and Validation Analyses, part 3. NASA SeaWiFS technical report 
series. pp. 8 226 22. Processing reference: Fu, G., Baith, K. S., and 
McClain, C. R. (1998). SeaDAS: The SeaWiFS Data Analysis System. Proceedings 
of \"The 4th Pacific Ocean Remote Sensing Conference\", Qingdao, China, July 
28-31, 1998, 73-79. Validation reference: Hooker, S.B., and C.R. 
McClain (2000). The Calibration and Validation of SeaWiFS Data. Prog. 
Oceanogr., 45, 427-465. Science quality data source: Professor Andrew 
Thomas, University of Maine.";
    String satellite "Orbview-2";
    String sensor "SeaWiFS HRPT";
    String source "satellite observation: Orbview-2, SeaWiFS HRPT";
    String sourceUrl "http://161.55.17.243:8081/thredds/dodsC/satellite/SH/cdev/8day";
    Float64 Southernmost_Northing 22.0;
    String standard_name_vocabulary "CF-1.0";
    String summary 
"NOAA CoastWatch distributes chlorophyll-a concentration data from the Sea-
viewing Wide Field-of-view Sensor (SeaWiFS) on the Orbview-2 satellite.  
Because the data was purchased under a NOAA contract with GeoEye, the data 
can be used but not redistributed.  Images made from the data, however, can 
be used for any purpose.  Questions regarding data access should be directed 
to NOAA CoastWatch.";
    String title "Chlorophyll-a Deviation, Orbview-2 SeaWiFS, West US (8 Day Composite)";
    Float64 Westernmost_Easting 215.0;
  }
}

 

Using griddap to Request Data and Graphs from Gridded Datasets

griddap lets you request gridded data (for example, environmental data from satellites) and graphs of gridded data, via specially formed URLs.
The URLs specify everything: the dataset, the desired file type for the response, and the subset of data that you want to receive.
You can form these URLs by hand or with a computer program,
or (much easier) you can use the dataset's "Data Access Form" (oriented to requests for data)
or the dataset's "Make A Graph" form (oriented to requests for graphs and maps),
both of which generate the URL when the form is submitted.
griddap is a superset of the OPeNDAP DAP hyperslab protocol.

griddap request URLs must be in the form
   http://coastwatch.pfeg.noaa.gov/erddap/griddap/ datasetID fileType {?query}
For example,
   http://coastwatch.pfeg.noaa.gov/erddap/griddap/erdBAssta5day.htmlTable?sst[(2007-10-21T00:00:00)][0][(-75):100:(75)][(180):100:(360)]

For details, see the griddap Documentation.
 
ERDDAP Version 1.22

Questions, comments, suggestions? Contact bob dot simons at noaa dot gov.
ERDDAP is a brought to you by NOAA NMFS SFSC ERD.
Disclaimers | Privacy Policy
Usage Limitations - The SeaWiFS images and data from this site may be used for free, but not redistributed;
    all other images and data from this site may be used and redistributed for free.