USGS Coastal and Marine Geology Program ERDDAP
Easier access to scientific data
Brought to you by USGS CMHRP    

ERDDAP > tabledap > Make A Graph ?

Dataset Title:  Wind-wave and suspended-sediment data from Liberty Island and Little Holland
Tract, Sacramento-San Joaquin Delta, California (ver. 2.0, September 2019),
Subscribe RSS
Institution:  USGS Coastal and Marine Geology Program   (Dataset ID: DL416LWAvir)
Range: longitude = -121.66939 to -121.66939°E, latitude = 38.28384 to 38.28384°N, depth = 1.0 to 1.0m, time = 2016-02-04T21:10:00Z to 2016-04-12T15:55:00Z
Information:  Summary ? | License ? | FGDC | ISO 19115 | Metadata | Background (external link) | Subset | Data Access Form | Files
Graph Type:  ?
X Axis: 
Y Axis: 
Constraints ? Optional
Constraint #1 ?
Constraint #2 ?
Server-side Functions ?
 distinct() ?
? ("Hover here to see a list of options. Click on an option to select it.Hover here to see a list of options. Click on an option to select it.Hover here to see a list of options. Click on an option to select it.Hover here to see a list of options. Click on an option to select it.")
Graph Settings
Marker Type:   Size: 
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.)
Then set the File Type: (File Type information)
or view the URL:
(Documentation / Bypass this form ? )
    Click on the map to specify a new center point. ?
Time range:    |<   -       
[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 {
 s {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.4546202e+9, 1.4604765e+9;
    String axis "T";
    String calendar "proleptic_gregorian";
    String ioos_category "Time";
    String long_name "time of measurement";
    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";
    Float64 actual_range 38.283842, 38.283842;
    String axis "Y";
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    Float64 epic_code 500.0;
    String FORTRAN_format "F10.4";
    String ioos_category "Location";
    String long_name "sensor latitude";
    String standard_name "latitude";
    String type "EVEN";
    String units "degrees_north";
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 actual_range -121.669386, -121.669386;
    String axis "X";
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    Float64 epic_code 502.0;
    String FORTRAN_format "F10.4";
    String ioos_category "Location";
    String long_name "sensor longitude";
    String standard_name "longitude";
    String type "EVEN";
    String units "degrees_east";
  depth {
    String _CoordinateAxisType "Height";
    String _CoordinateZisPositive "down";
    Float64 actual_range 1.0, 1.0;
    String axis "Z";
    Float64 colorBarMaximum 8000.0;
    Float64 colorBarMinimum -8000.0;
    String colorBarPalette "TopographyDepth";
    Float64 epic_code 3.0;
    Float64 initial_sensor_height 0.25;
    String ioos_category "Location";
    String long_name "mean water depth";
    String positive "down";
    String source_name "z";
    String standard_name "depth";
    String units "m";
  Trb_980 {
    Float64 _FillValue NaN;
    Float64 actual_range -10.6754691, 482.4605455;
    String coverage_content_type "physicalMeasurement";
    Float64 epic_code 980.0;
    Float64 initial_sensor_height 0.25;
    String ioos_category "Unknown";
    String long_name "TURBIDITY (NTU)";
    String name "trb";
    String sensor_manufacturer "Seapoint";
    String sensor_type "Seapoint Turbidity Meter";
    Float64 serial_number 54128.0;
    String standard_name "sea_water_turbidity";
    String units "NTU";
  SED_981 {
    Float64 _FillValue NaN;
    Float64 actual_range -0.6943477830587558, 536.7632413235108;
    Float64 colorBarMaximum 1.0;
    Float64 colorBarMinimum 0.0;
    String coverage_content_type "physicalMeasurement";
    Float64 epic_code 981.0;
    String ioos_category "Physical Oceanography";
    String long_name "Sediment concentration";
    String name "Sed";
    String standard_name "mass_concentration_of_suspended_matter_in_sea_water";
    String units "mg/l";
  feature_type_instance {
    String cf_role "timeseries_id";
    String coverage_content_type "physicalMeasurement";
    String ioos_category "Identifier";
    String long_name "Feature Type Instance";
    String _NCProperties "version=2,netcdf=4.7.4,hdf5=1.10.6";
    String basefilename "054128_DL416LWA02";
    String calibration_Date "27-May-2016 16:15:52";
    String calibration_FitOrder "linear";
    String calibration_Units "mg/l";
    Float64 calibration_Values 1.1981247801733053, -1.3250739752108724;
    String cdfFilename "";
    String cdm_data_type "TimeSeries";
    String cdm_timeseries_variables "feature_type_instance, latitude, longitude";
    String CollaboratingAgency "NRP, CA WSC";
    Float64 COMPOSITE 0.0;
    String Conventions "CF-1.6, ACDD-1.3, COARDS";
    String creation_date "27-Sep-2016 11:31:26";
    String creator_name "USGS Coastal and Marine Geology Program";
    String creator_type "institution";
    String creator_url "";
    String CruiseID "2016-607-FA";
    String DATA_CMT "San Francisco Bay Delta RBR Virtuoso-Tu";
    String DATA_TYPE "TIME";
    String datasetID "DL416LWAvir";
    String date_created "2016-09-27T11:31:26Z";
    String Deployment_date "04-FEB-2016 21:07";
    Float64 DEPTH_CONST 0.0;
    String DESCRIPTION "weight stand";
    Float64 DRIFTER 0.0;
    String drops "no";
    Float64 Easternmost_Easting -121.669386;
    String EXPERIMENT "DL416LWA";
    String experiment_id "DL416";
    String featureType "TimeSeries";
    Float64 FILL_FLAG 1.0e+35;
    Float64 geospatial_lat_max 38.283842;
    Float64 geospatial_lat_min 38.283842;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -121.669386;
    Float64 geospatial_lon_min -121.669386;
    String geospatial_lon_units "degrees_east";
    Float64 geospatial_vertical_max 1.0;
    Float64 geospatial_vertical_min 1.0;
    String geospatial_vertical_positive "down";
    String geospatial_vertical_units "m";
    String history 
"Imported from ScienceBase data release and converted to CF using process_F73R0R07.ipynb;
2024-04-16T05:21:28Z (local files)
    String id "DL416LWAvir";
    String infoUrl "";
    Float64 initial_instrument_height 0.25;
    String INST_TYPE "RBR Virtuoso Turbidity Logger";
    String institution "USGS Coastal and Marine Geology Program";
    String instrument_number "DL416LWA02";
    Float64 interval 300.0;
    String keywords "california, chemistry, coastal, concentration, data, delta, depth, dl416lwavir, earth, Earth Science > Oceans > Marine Sediments > Particle Flux, Earth Science > Oceans > Marine Sediments > Sediment Transport, Earth Science > Oceans > Ocean Chemistry > Suspended Solids, feature, feature_type_instance, flux, geological, geology, holland, identifier, instance, island, joaquin, latitude, liberty, little, longitude, marine, mass, mass_concentration_of_suspended_matter_in_sea_water, matter, measurement, nephelometric, ntu, ocean, oceanography, oceans, particle, physical, physical oceanography, program, sacramento, sacramento-san, san, science, sea, sea_water_turbidity, seawater, SED_981, sediment, sediment transport, sediments, sensor, solids, states, survey, suspended, suspended-sediment, time, tract, transport, Trb_980, turbidity, type, united, units, usgs, water, wave, wind, wind-wave";
    String keywords_vocabulary "GCMD Science Keywords";
    Float64 latitude 38.283842;
    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 loggerType "Virtuoso";
    Float64 longitude -121.669386;
    Float64 magnetic_variation 13.7;
    String metadata_link "";
    String mode "average";
    String MOORING "DL416LWA";
    String naming_authority "gov.usgs.cmgp";
    Float64 nominal_instrument_depth 1.0;
    Float64 Northernmost_Northing 38.283842;
    Float64 number_of_samples 19522.0;
    String OFAFunding "USBR";
    String platform_type "Tripod";
    Float64 POS_CONST 0.0;
    String program "Sediment Transport in Coastal Environments";
    String project "CMG_Portal";
    String publisher_url "";
    String range "500";
    String raw_filename "054128_DL416LWA02.rsk";
    String Recovery_date "12-APR-2016 15:57";
    String Region "Sacramento-San Joaquin Delta";
    String SciPi "Jessica Lacy";
    Float64 serial_number 54128.0;
    String Site "LWA";
    String source "USGS";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 38.283842;
    String standard_name_vocabulary "CF Standard Name Table v66";
    String STD "yes";
    String subsetVariables "latitude, longitude, depth, feature_type_instance";
    String summary 
"Wind-wave and suspended-sediment data from Liberty Island and Little Holland Tract, Sacramento-San Joaquin Delta, California (ver. 2.0, September 2019) - DL416LWAvir. Data were collected by the U.S. Geological Survey (United States Geological Survey (USGS)) Pacific Coastal and Marine Science Center to investigate the influence of wind waves on sediment dynamics in two flooded agricultural tracts in the northern Sacramento-San Joaquin Delta: Little Holland Tract and Liberty Island. This effort is part of a large interdisciplinary study led by the USGS California Water Science Center and funded by the U.S. Bureau of Reclamation to investigate how shallow-water habitats in the Sacramento-San Joaquin Delta function and whether they provide good habitat for native fish species, including the Delta smelt. Elevated turbidity is a requirement for Delta smelt habitat, and turbidity is largely comprised of suspended sediment. Wind waves develop in large open-water regions with large fetch, and can increase turbidity by mobilizing bottom sediments.

Data were collected from several sites in Little Holland Tract (LHT) and Liberty Island (LI), including the Liberty Island Conservation Bank (LICB), from 2015 to 2017. Table 1 (below) lists the deployment name (DLXXX) and dates for each sampling station location. Station names starting with 'H' are in LHT; station names starting with 'L' are in LI, and the station name starting with 'W' is in LICB. At stations with a 'W' as the second character of the station name, we collected water-level, wind-wave, and turbidity time-series data. At stations with a 'V' as the second character of the station name, we collected water-level, wind-wave, and turbidity, as well as velocity time-series data. The turbidity sensors were calibrated to suspended-sediment concentration measured in water samples collected on site (tables 2a,b) for LHT and LI. Details on instrumentation and sampling are included on the individual pages for each station (see links below). Data were sequentially added to this data release as they were retrieved and post-processed.";
    String time_coverage_duration "P67DT18H45M0S";
    String time_coverage_end "2016-04-12T15:55:00Z";
    String time_coverage_resolution "P0DT0H5M0S";
    String time_coverage_start "2016-02-04T21:10:00Z";
    String title "Wind-wave and suspended-sediment data from Liberty Island and Little Holland Tract, Sacramento-San Joaquin Delta, California (ver. 2.0, September 2019), DL416LWAvir";
    String txt_filename "054128_DL416LWA02_eng.txt";
    Float64 WATER_DEPTH -1.2;
    String WATER_DEPTH_datum "MSL";
    String WATER_DEPTH_SOURCE "DEM of Liberty";
    String WATER_DEPTH_source "User Input";
    Float64 Westernmost_Easting -121.669386;


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{?query}
For example,,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.

ERDDAP, Version 2.23
Disclaimers | Privacy Policy | Contact