Data Access Form

Dataset Title:	Front Probability, GOES Imager, Western Hemisphere, EXPERIMENTAL (Monthly Composite)
Institution:	NOAA CoastWatch, West Coast Node (Dataset ID: erdGAtfntmday)
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Make a graph

Dimensions	Size	Spacing
time (Centered Time, UTC)	143	31 days 11h 54m 56s (uneven)

altitude (m)	1	(just one value)

latitude (degrees_north)	2100	0.05 (even)

longitude (degrees_east)	3000	0.05 (even)

Grid Variables (which always also download all of the dimension variables)
front (Front Probability, unitless)

File type: more info
Documentation / Bypass this form

(Please be patient. It may take a while to get the data.)

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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 9.796464e+8, 1.3660704e+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 -44.975, 59.975;
    String axis "Y";
    String coordsys "geographic";
    Int32 fraction_digits 3;
    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 180.025, 329.975;
    String axis "X";
    String coordsys "geographic";
    Int32 fraction_digits 3;
    String ioos_category "Location";
    String long_name "Longitude";
    String point_spacing "even";
    String standard_name "longitude";
    String units "degrees_east";
  }
  front {
    Float32 _FillValue -9999999.0;
    Float64 colorBarMaximum 0.4;
    Float64 colorBarMinimum 0.0;
    String colorBarPalette "WhiteRedBlack";
    String coordsys "geographic";
    Int32 fraction_digits 1;
    String ioos_category "Meteorology";
    String long_name "Front Probability";
    Float32 missing_value -9999999.0;
    String units "unitless";
  }
  NC_GLOBAL {
    String acknowledgement "NOAA NESDIS COASTWATCH, NOAA SWFSC ERD";
    String cdm_data_type "Grid";
    String composite "true";
    String contributor_name "NOAA NESDIS";
    String contributor_role "Source of level 2 data.";
    String Conventions "COARDS, CF-1.6, 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 "2013-05-01Z";
    String date_issued "2013-05-01Z";
    Float64 Easternmost_Easting 329.975;
    Float64 geospatial_lat_max 59.975;
    Float64 geospatial_lat_min -44.975;
    Float64 geospatial_lat_resolution 0.05;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 329.975;
    Float64 geospatial_lon_min 180.025;
    Float64 geospatial_lon_resolution 0.05;
    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 
"NOAA NESDIS
2013-05-01T09:15:02Z NOAA CoastWatch (West Coast Node) and NOAA SFSC ERD
2013-05-20T14:21:58Z http://oceanwatch.pfeg.noaa.gov/thredds/dodsC/satellite/GA/tfnt/mday
2013-05-20T14:21:58Z http://coastwatch.pfeg.noaa.gov/erddap/griddap/erdGAtfntmday.das";
    String infoUrl "http://coastwatch.pfeg.noaa.gov/infog/GA_tfnt_las.html";
    String institution "NOAA CoastWatch, West Coast Node";
    String keywords 
"Oceans > Ocean Circulation > Fronts,
circulation, coastwatch, degrees, experimental, front, fronts, goes,
hemisphere, imager, meteorology, monthly, noaa, ocean, oceans, probability,
wcn, western";
    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 Metadata_Conventions "COARDS, CF-1.6, Unidata Dataset Discovery v1.0";
    String naming_authority "gov.noaa.pfel.coastwatch";
    Float64 Northernmost_Northing 59.975;
    String origin "NOAA NESDIS";
    String processing_level "3";
    String project "CoastWatch (http://coastwatch.noaa.gov/)";
    String projection "geographic";
    String projection_type "mapped";
    String references 
"Front Index information: Breaker, Laurence C., Timothy P. Mavor, and William
W. Broenkow (April 18, 2005). Mapping and Monitoring Large-Scale Ocean Fronts
Off the California Coast Using Imagery from the GOES-10 Geostationary
Satellite. California Sea Grant College Program. Research Completion Reports.
Paper Coastal05_02. Available at http://repositories.cdlib.org/csgc/rcr/Coastal05_02/
.  NOAA GOES satellites: http://coastwatch.noaa.gov/goes_sst_overview.html .
NOAA GOES satellites: http://www.oso.noaa.gov/goes/index.htm . Processing
reference: Wu, X., W. P. Menzel, and G. S. Wade (1999). Estimation of sea
surface temperatures using GOES-8/9 radiance measurements. Bull. Amer.
Meteor. Soc., 80, 1127-1138. Processing reference: Maturi, E., C. Merchant,
A. Harris, X. Li, and B. Potash.  Geostationary Sea Surface Temperature
Product Validation and Methodology.  Poster Presentation at the American
Meteorological Society's 13th Conference on Satellite Meteorology and
Oceanography (P5.16).  Norfolk, VA; 19-23 Sept., 2004.
http://ams.confex.com/ams/pdfpapers/79202.pdf .";
    String satellite "GOES";
    String sensor "Imager";
    String source "satellite observation: GOES, Imager";
    String sourceUrl "http://oceanwatch.pfeg.noaa.gov/thredds/dodsC/satellite/GA/tfnt/mday";
    Float64 Southernmost_Northing -44.975;
    String standard_name_vocabulary "CF-12";
    String summary 
"The data indicates the probability of oceanic sea surface temperature fronts
off the California coast. They were created using remote sensing sea surface
temperature data from the GOES geostationary satellite. THIS IS AN
EXPERIMENTAL PRODUCT: intended strictly for scientific evaluation by
professional marine scientists. The data is unitless.";
    String time_coverage_end "2013-04-16T00:00:00Z";
    String time_coverage_start "2001-01-16T12:00:00Z";
    String title 
"Front Probability, GOES Imager, Western Hemisphere, EXPERIMENTAL (Monthly
Composite)";
    Float64 Westernmost_Easting 180.025;
  }
}

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 Data Access Protocol (DAP) and its projection constraints.

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.

(easy) You can get data by using the dataset's Data Access Form. It makes the URL for you.
(easy) You can make a graph or map by using the dataset's Make A Graph form. It makes the URL for you.
(not hard) You can bypass the forms and get the data or make a graph or map by generating the URL by
hand or with a computer program or script.

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)]
Thus, the query is often a variable name (e.g., sst),
followed by a set of [] for each of the variable's dimensions
(for example, [time][altitude][latitude][longitude]),
with your desired (start):stride:(stop) values within each [].

For details, see the griddap Documentation.

ERDDAP, Version 1.42
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