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Dataset Title:  CDR Leaf Area and Fraction of Absorbed Photosynthetically Active Radiation By
time, latitude, longitude   RSS
Institution:  NASA/GSFC/SED/ESD/HBSL/TIS/MODIS-LAND > MODIS Land Science Team, Terrestrial Information Systems, Hydrospheric and Biospheric Science Laboratory, Earth Sciences Division, Science and Exploration Directorate, GSFC, NASA   (Dataset ID: cdr_lai_fapar_by_time_latitude_longitude)
Information:  Summary ? | License ? | Metadata | Background | Make a graph
 
Dimensions ? Start ? Stride ? Stop ?  Size ?    Spacing ?
 time (UTC) ?      11861    1 day 0h 2m 11s (uneven)
  < slider >
 latitude (degrees_north) ?      3600    -0.05 (uneven)
  < slider >
 longitude (degrees_east) ?      7200    0.05 (uneven)
  < slider >
 
Grid Variables (which always also download all of the dimension variables) 
 QA (quality control) ?
 FAPAR (Fraction of Absorbed Photosynthetically Active Radiation, 1) ?
 LAI (Leaf Area Index, 1) ?

File type: (more information)

(Documentation / Bypass this form) ?
 
(Please be patient. It may take a while to get the data.)


 

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 3.621888e+8, 1.388448e+9;
    String axis "T";
    String calendar "proleptic_gregorian";
    String ioos_category "Time";
    String long_name "Forecast time for ForecastModelRunCollection";
    Float64 missing_value NaN;
    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 -89.97499, 89.975;
    String axis "Y";
    String bounds "lat_bnds";
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float32 actual_range -179.975, 179.975;
    String axis "X";
    String bounds "lon_bnds";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  QA {
    Int32 _ChunkSizes 1, 1200, 2400;
    UInt16 _FillValue 65535;
    String coordinates "time_run time latitude longitude";
    Int16 flag_masks 3, 3, 3, 3, 60, 60, 60, 60, 60, 60, 64, 64, 384, 384, 384;
    String flag_meanings "Quality_OK Quality_Cloudy Quality_Invalid_Input Quality_Output_Out_of_Range Needleleaf_Forest Broadleaf_Forest Shrublands Grasslands_&_Croplands_&_Non-Vegetated Evergreen_Broadleaf_Forest Water BRDF_Corrected_No BRDF_Corrected_Yes In_Domain Not_In_Domain Not_Tested_(water/cloud)";
    Int16 flag_values 0, 1, 2, 3, 4, 8, 12, 16, 20, 24, 0, 64, 0, 128, 256;
    String grid_mapping "crs";
    String long_name "quality control";
    String qa_index "Bits are listed from the MSB (bit 15) to the LSB (bit 0):Bit    Description9-15   spare (unused); 7-8    Domain definition test;        00 -- in Domain definition       01 -- not in Domain definition       10 -- not tested (water/cloudy)6      BRDF corrected;        0 -- no       1 -- yes2-5    Associated Class;       001 -- NeedleLeaf Forest       010 -- BroadLeaf Forest       011 -- Shrublands       100 -- Grasslands & Croplands & Non vegetated       101 -- Evergreen broadleaf forest       110 -- Water0-1    Quality control;        00 -- OK       01 -- Input flag as Cloudy       10 -- Invalid input       11 -- Output out of range";
  }
  FAPAR {
    Int32 _ChunkSizes 1, 1200, 2400;
    String coordinates "time_run time latitude longitude";
    String grid_mapping "crs";
    String long_name "Fraction of Absorbed Photosynthetically Active Radiation";
    String standard_name "fraction_of_surface_downwelling_photosynthetic_radiative_flux_absorbed_by_vegetation";
    String units "1";
  }
  LAI {
    Int32 _ChunkSizes 1, 1200, 2400;
    String coordinates "time_run time latitude longitude";
    String grid_mapping "crs";
    String long_name "Leaf Area Index";
    String standard_name "leaf_area_index";
    String units "1";
  }
  NC_GLOBAL {
    String _CoordSysBuilder "ucar.nc2.dataset.conv.CF1Convention";
    String cdm_data_type "Grid";
    String cdr_variable "LAI, FAPAR";
    String Conventions "CF-1.4, ACDD-1.3";
    String date_created "2018-08-31T02:38:56Z";
    Float64 Easternmost_Easting 179.975;
    String ESDT "AVH15C1";
    Float64 geospatial_lat_max 89.975;
    Float64 geospatial_lat_min -89.97499;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 179.975;
    Float64 geospatial_lon_min -179.975;
    String geospatial_lon_units "degrees_east";
    String history 
"FMRC Best Dataset
2024-04-19T09:57:58Z https://www.ncei.noaa.gov/thredds/dodsC/ncFC/cdr/lai-fapar-fc/LAI-FAPAR:__Aggregation_best.ncd
2024-04-19T09:57:58Z https://www.ncei.noaa.gov/erddap/griddap/cdr_lai_fapar_by_time_latitude_longitude.das";
    String id "AVHRR-Land_v005_AVH15C1_NOAA-19_20131230_c20180831023856.nc";
    String infoUrl "https://www.ncei.noaa.gov/thredds/catalog/ncFC/cdr/lai-fapar-fc/catalog.html?dataset=ncFC/cdr/lai-fapar-fc/LAI-FAPAR:__Aggregation_best.ncd";
    String InputDataType "GAC";
    String institution "NASA/GSFC/SED/ESD/HBSL/TIS/MODIS-LAND &gt; MODIS Land Science Team, Terrestrial Information Systems, Hydrospheric and Biospheric Science Laboratory, Earth Sciences Division, Science and Exploration Directorate, GSFC, NASA";
    String Instrument "AVHRR";
    String instrument_vocabulary "Global Change Master Directory (GCMD) Instrument Keywords";
    String keywords "Earth Science > Biosphere > Vegetation > Photosynthetically Active Radiation, Earth Science > Biosphere > Vegetation > Vegetation Index";
    String keywords_vocabulary "NASA Global Change Master Directory (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 LocalGranuleId "AVHRR-Land_v005_AVH15C1_NOAA-19_20131230_c20180831023856.nc";
    String location "Proto fmrc:LAI-FAPAR:__Aggregation";
    String metadata_link "https://doi.org/10.7289/V5TT4P69";
    String naming_authority "gov.noaa.ncei";
    Float64 Northernmost_Northing 89.975;
    String PFIIVersion "3.5.45";
    String platform "NOAA-19 > National Oceanic & Atmospheric Administration-19";
    String platform_vocabulary "Global Change Master Directory (GCMD) Platform Keywords";
    String PostProcessingVersion "2.9";
    String Process "LTDR_GAPS";
    String product_version "v5r0";
    String ProductionDate "2018-08-31T02:38:56.000000Z";
    String program "NOAA Climate Data Record Program for satellites";
    String RangeBeginningDate "2013-364";
    String RangeBeginningTime "00:00:00.0000";
    String RangeEndingDate "2013-364";
    String RangeEndingTime "23:59:59.9999";
    String Satellite "NOAA-19";
    String sensor "AVHRR > Advanced Very High Resolution Radiometer";
    String source "v45_MODISWV_L3_GEOG_0.05DEG_364-364_13.NOAA-19.hdf, LANDCOVER_IGBP_1981_1994.hdf, PGE11_band01_BRDF_slope_intercept_params.hdf, PGE11_band02_BRDF_slope_intercept_params.hdf";
    String sourceUrl "https://www.ncei.noaa.gov/thredds/dodsC/ncFC/cdr/lai-fapar-fc/LAI-FAPAR:__Aggregation_best.ncd";
    Float64 Southernmost_Northing -89.97499;
    String spatial_resolution "0.050000 degrees per pixel";
    String standard_name_vocabulary "CF Standard Name Table (v27)";
    String summary "Climate Data Record, Advanced Very High Resolution Radiometer (AVHRR) High Resolution Picture Transmission (HRPT) data from NOAA-18 for 2013, days 364 to 364, processed by the Long-Term Land Data Record (LTDR) project (v3.5.33) into Leaf Area, Fraction of Absorbed Photosynthetically Active Radiation and quality-control flags. Dimensioned By time, latitude, longitude.";
    String time_coverage_end "2013-12-31T00:00:00Z";
    String time_coverage_start "1981-06-24T00:00:00Z";
    String title "CDR Leaf Area and Fraction of Absorbed Photosynthetically Active Radiation By time, latitude, longitude";
    Float64 Westernmost_Easting -179.975;
  }
}

 

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/erdBAssta5day.htmlTable?sst[(2007-10-21T00:00:00)][0][(-75):100:(75)][(180):100:(360)]
Thus, the query is often a data variable name (e.g., sst), followed by [(start):stride:(stop)] (or a shorter variation of that) for each of the variable's dimensions (for example, [time][altitude][latitude][longitude]).

For details, see the griddap Documentation.


 
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