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Dataset Title:  Rockfish Recruitment and Ecosystem Assessment Survey, Catch Data Subscribe RSS
Institution:  NOAA NMFS SWFSC FED   (Dataset ID: FED_Rockfish_Catch)
Range: longitude = -125.1552 to -117.3265°E, latitude = 32.6937 to 41.50633°N, time = 1990-05-13T00:00:00Z to 2015-06-14T00:00:00Z
Information:  Summary ? | License ? | FGDC | ISO 19115 | Metadata | Background (external link) | Subset | Data Access Form
 
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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 {
 s {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 6.425568e+8, 1.43424e+9;
    String axis "T";
    String description "The date and time the trawl net first enters the water.  Where Net-in time is missing, the fishing start time is used";
    String ioos_category "Time";
    String long_name "Net-in 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 32.6937, 41.50633;
    String axis "Y";
    String description "GPS North latitude  when the trawl net first enters the water.";
    String ioos_category "Location";
    String long_name "Net-in Latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float32 actual_range -125.1552, -117.3265;
    String axis "X";
    String description "GPS East longitude when the trawl net first enters the water.";
    String ioos_category "Location";
    String long_name "Net-in Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  cruise {
    String definition "A four character cruise identifier.  The first two digits are the year and the last two are sequential order in which the cruise occurred.  Example:  0504 is the fourth David Starr Jordan cruise in 2005.";
    String ioos_category "Identifier";
    String long_name "Cruise";
  }
  haul_no {
    Int32 actual_range 1, 241;
    String definition "Unique number for each trawl conducted within a cruise.  Together with cruise, it creates a primary key.";
    String ioos_category "Identifier";
    String long_name "Haul Number";
  }
  vessel {
    String definition "Unique identifier for the vessel used for a particular cruise.  Abbreviation of the vessel names: DSJ=David Starr Jordan, MF=Miller Freeman, FR=Frosti, EX=Excalibur, SH=Bell M. Shimada, OS=Ocean Starr";
    String ioos_category "Identifier";
    String long_name "Vessel";
  }
  station {
    Int32 actual_range 101, 627;
    String definition "Station number based on a fixed position.  Station can be blank if the trawl was conducted at a location that does not correspond to one of the fixed position stations in the STANDARD_STATIONS table.";
    String ioos_category "Identifier";
    String long_name "Station Number";
  }
  catch {
    String definition "Number of specimens caught for a given specie/taxonomic group.";
    String ioos_category "Fish Abundance";
    String long_name "Catch";
  }
  species_code {
    Int32 actual_range 5, 2851;
    String definition "Numeric code denoting species or other taxonomic group.";
    String ioos_category "Identifier";
    String long_name "Species code";
  }
  common_name {
    String definition "Common name of the species or taxonomic group.";
    String ioos_category "Fish Species";
    String long_name "Common name";
  }
  sci_name {
    String definition "Scientific name of the species or taxonomic group.";
    String ioos_category "Fish Species";
    String long_name "Scientific name";
  }
  species_group {
    String definition "General categories for grouping select species or taxonomic groups.";
    String ioos_category "Fish Species";
    String long_name "Species Group";
  }
  maturity {
    String definition "Possible choices for the life history stage of the given species or taxonomic group: Y=young-of-the-year (YOY)/pelagic stage   A=older than YOY/post-settlement   U=unknown.  These do not refer to reproductive maturity stages.";
    String ioos_category "Other";
    String long_name "Maturity";
  }
  species_notes {
    String definition "Notes on when species were added to list, years enumerated, etc.";
    String ioos_category "Other";
    String long_name "Species Notes";
  }
  aphiaid {
    Int32 actual_range 1128, 1043739;
    String definition "WoRMS taxon id";
    String ioos_category "Fish Species";
    String long_name "AphiaID";
  }
  match_type {
    String definition "WoRMS taxon id match type";
    String ioos_category "Fish Species";
    String long_name "Match type";
  }
  lsid {
    String definition "persistent, location-independent, resource identifier";
    String ioos_category "Fish Species";
    String long_name "Life Science Identifier";
  }
  station_latitude {
    String definition "GPS North latitude of the station.";
    String ioos_category "Location";
    String long_name "Station Latitude";
    String units "degrees_north";
  }
  station_longitude {
    String definition "GPS East longitude of the station.";
    String ioos_category "Location";
    String long_name "Station Longitude";
    String units "degrees_east";
  }
  ctd_index {
    String definition "Unique number for each CTD conducted within a cruise.";
    String ioos_category "Identifier";
    String long_name "CTD Index";
  }
  station_bottom_depth {
    String definition "Charted bottom depth of the station.";
    String ioos_category "Pressure";
    String long_name "Station Bottom Depth";
    String units "meters";
  }
  area {
    String definition "General geographic area the station occupies.";
    String ioos_category "Location";
    String long_name "General Area";
  }
  strata {
    String definition "Abbreviation of survey region (N=North, NC=North Central, C=Core, SC=South Central, S=South).";
    String ioos_category "Location";
    String long_name "Survey Region";
  }
  tdr_depth {
    String definition "Water depth of the headrope bridle recorded by Temperature Depth Recorder (TDR).";
    String ioos_category "Pressure";
    String long_name "TDR Depth";
    String units "meters";
  }
  depth_strata {
    Int32 actual_range 1, 2;
    String definition "Single digit reference number for the target headrop depth where 1=10m, 2=30m, 3=90m, 4=other";
    String ioos_category "Pressure";
    String long_name "Target Headrop Depth";
  }
  bottom_depth {
    String definition "Bottom depth where the trawl was conducted.  The depth either comes from an acoustic sensor or from a chart.";
    String ioos_category "Pressure";
    String long_name "Bottom Depth";
    String units "meters";
  }
  station_active {
    String definition "Designates currently sampled stations (Y) versus historic stations no longer sampled (N).";
    String ioos_category "Other";
    String long_name "Station Active";
  }
  station_notes {
    String definition "Mostly used to denote when new stations were added.";
    String ioos_category "Other";
    String long_name "Station notes";
  }
 }
  NC_GLOBAL {
    String acknowledgment "Fisheries Ecology Division/SWFSC/NOAA";
    String cdm_data_type "Point";
    String Conventions "COARDS, CF-1.4, Unidata Dataset Discovery v1.0, NCCSV-1.0";
    String creator_email "lynn.dewitt@noaa.gov";
    String date_issued "2016-10-01";
    String date_modified "2016-10-01";
    String defaultGraphQuery "longitude,latitude,catch&time>=2015-05-01T00:00:00Z&time<=2015-07-01T00:00:00Z&common_name=\"PACIFIC HAKE\"&maturity=\"Y\"&catch>0&.draw=markers&.marker=5|4&.color=0x000000&.colorBar=||Log|||";
    Float64 Easternmost_Easting -117.3265;
    String featureType "Point";
    Float64 geospatial_lat_max 41.50633;
    Float64 geospatial_lat_min 32.6937;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -117.3265;
    Float64 geospatial_lon_min -125.1552;
    String geospatial_lon_units "degrees_east";
    String history 
"2018-07-15T19:34:52Z (source database)
2018-07-15T19:34:52Z http://coastwatch.pfeg.noaa.gov/tabledap/FED_Rockfish_Catch.das";
    String infoUrl "http://calcofi.org/publications/calcofireports/v57/Vol57-Sakuma_pages.163-183.pdf";
    String institution "NOAA NMFS SWFSC FED";
    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-1.4, Unidata Dataset Discovery v1.0";
    Float64 Northernmost_Northing 41.50633;
    String publisher_email "John.Field@noaa.gov";
    String publisher_name "John Field";
    String sourceUrl "(source database)";
    Float64 Southernmost_Northing 32.6937;
    String standard_name_vocabulary "CF-12";
    String subsetVariables "cruise,haul_no,station,species_code,common_name,sci_name,species_group,maturity,aphiaid,area,strata,station_active,vessel,depth_strata";
    String summary "The Fisheries Ecology Division (FED, https://swfsc.noaa.gov/GroundfishAnalysis/) of the Southwest Fisheries Science Center (SWFSC) has conducted a midwater trawl survey off central California since 1983 with the primary goal of developing pre-recruit indices for young-of-the-year (YOY) rockfish (Sebastes spp.). The survey also samples numerous other components of the epipelagic micronekton, including other YOY groundfish (such as Pacific hake, Merluccius productus, and sanddab, Citharichthys spp ), coastal pelagic fishes (such as Pacific sardine, Sardinops sagax, and northern anchovy, Engraulis mordax) and other forage species.  Additional details regarding the survey methods and results are described in Ralston et al. (2015) and Sakuma et al. (http://calcofi.org/publications/calcofireports/v57/Vol57-Sakuma_pages.163-183.pdf). Ralston, S., J.C. Field and K.S. Sakuma. 2015. Longterm variation in a central California pelagic forage assemblage. Journal of Marine Systems 146: 26-37. https://dx.doi.org/10.1016/j.jmarsys.2014.06.013. Sakuma, K.M., J.C. Field, B.B. Marinovic, C.N. Carrion, N.J. Mantua and S. Ralston. In revision. Anomalous epipelagic micronekton assemblage patterns in the neritic waters of the California Current in spring 2015 during a period of extreme ocean conditions. CalCOFI Reports.";
    String time_coverage_end "2015-06-14T00:00:00Z";
    String time_coverage_start "1990-05-13T00:00:00Z";
    String title "Rockfish Recruitment and Ecosystem Assessment Survey, Catch Data";
    Float64 Westernmost_Easting -125.1552;
  }
}

 

Using tabledap to Request Data and Graphs from Tabular Datasets

tabledap lets you request a data subset, a graph, or a map from a tabular dataset (for example, buoy data), via a specially formed URL. tabledap uses the OPeNDAP (external link) Data Access Protocol (DAP) (external link) and its selection 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.

Tabledap request URLs must be in the form
https://coastwatch.pfeg.noaa.gov/erddap/tabledap/datasetID.fileType{?query}
For example,
https://coastwatch.pfeg.noaa.gov/erddap/tabledap/pmelTaoDySst.htmlTable?longitude,latitude,time,station,wmo_platform_code,T_25&time>=2015-05-23T12:00:00Z&time<=2015-05-31T12:00:00Z
Thus, the query is often a comma-separated list of desired variable names, followed by a collection of constraints (e.g., variable<value), each preceded by '&' (which is interpreted as "AND").

For details, see the tabledap Documentation.


 
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