Make A Graph

Dataset Title:	SC_Harbor - SCH2025_090_11700
Institution:	Coastal and Marine Hazards and Resources Program, U.S. Geological Survey (Dataset ID: SC_Harbor_SCH2025_090_11700_nc)
Range:	longitude = 36.963898 to 36.963898°E, latitude = -122.00216 to -122.00216°N, time = 2025-04-01T03:16:30Z to 2025-04-01T03:28:30Z
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Data Access Form \| Files

To work correctly, this web page requires that JavaScript be enabled in your browser. Please:
1) Enable JavaScript in your browser:
      • Chrome: "Settings : Advanced : Privacy and security : Site Settings : JavaScript"
      • Firefox: (it should be always on!)"
      • Opera: "Settings : Websites : JavaScript"
      • Safari: "Safari : Preferences : Security : Enable JavaScript"
2) Reload this web page.

Graph Type:

X Axis:

Y Axis:

Color:

Constraints	Optional Constraint #1		Optional Constraint #2

Server-side Functions

distinct()

Hover here to see a list of options. Click on an option to select it.

Graph Settings

Marker Type:

Size:

Color:

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.)

Optional:
Then set the File Type: (File Type information)
and

or view the URL:
(Documentation / Bypass this form

)

Click on the map to specify a new center point.

Zoom:

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:

Web page authors can embed a graph of the latest data in a web page using HTML <img> tags.
Anyone can use ERDDAPs Slide Sorter to build a personal web page that displays graphs with the latest data (or other images or HTML content), each in its own, draggable slide.

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  station_id {
    String actual_range 
"SC_Harbor_SCH2025_090_11700_nc
SC_Harbor_SCH2025_090_11700_nc";
    String cf_role "timeseries_id";
    String ioos_category "Identifier";
    String long_name "Station ID";
  }
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.74347739012e+9, 1.74347811012e+9;
    String axis "T";
    String calendar "proleptic_gregorian";
    String ioos_category "Time";
    String long_name "time (UTC)";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  depth_m {
    Float32 actual_range -4.31, 4.19;
    String ioos_category "Other";
    String long_name "depth below mean sea level";
    String positive "down";
    String standard_name "depth";
    String units "m";
  }
  z {
    Float32 actual_range 1.31, 9.81;
    String axis "Z";
    String ioos_category "Other";
    String long_name "height relative to sea bed";
    String positive "up";
    String standard_name "height";
    String units "m";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 actual_range -122.002162, -122.002162;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 actual_range 36.963897, 36.963897;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  AGC_1202 {
    Float32 actual_range 64.54315, 230.0799;
    String ioos_category "Other";
    String long_name "Average Echo Intensity";
    Float32 missing_value 1.0e+20;
    String units "counts";
  }
  Werr_1201 {
    Float32 actual_range -0.01651325, 0.07184361;
    String ioos_category "Other";
    String long_name "Error Velocity";
    Float32 missing_value 1.0e+20;
    String units "m s-1";
  }
  w_1204 {
    Float32 actual_range -0.0531545, 0.04149147;
    String ioos_category "Other";
    String long_name "Vertical Velocity";
    Float32 missing_value 1.0e+20;
    String units "m s-1";
  }
  u_1205 {
    Float32 actual_range -0.06698854, 0.1514962;
    String ioos_category "Other";
    String long_name "Eastward Velocity";
    Float32 missing_value 1.0e+20;
    String standard_name "upward_sea_water_velocity";
    String units "m s-1";
  }
  v_1206 {
    Float32 actual_range -0.1419327, 0.695755;
    String ioos_category "Other";
    String long_name "Northward Velocity";
    Float32 missing_value 1.0e+20;
    String standard_name "eastward_sea_water_velocity";
    String units "m s-1";
  }
  e_std {
    Float32 actual_range 0.0, 0.1230251;
    String ioos_category "Other";
    String long_name "Error Velocity Standard Deviation";
    Float32 missing_value 1.0e+20;
    String standard_name "northward_sea_water_velocity";
    String units "m s-1";
  }
  w_std {
    Float32 actual_range 0.0, 0.07621839;
    String ioos_category "Other";
    String long_name "Vertical Velocity Standard Deviation";
    Float32 missing_value 1.0e+20;
    String units "m s-1";
  }
  u_std {
    Float32 actual_range 0.0, 0.3840096;
    String ioos_category "Other";
    String long_name "Eastward Velocity Standard Deviation";
    Float32 missing_value 1.0e+20;
    String units "m s-1";
  }
  v_std {
    Float32 actual_range 0.0, 0.346689;
    String ioos_category "Other";
    String long_name "Northward Velocity Standard Deviation";
    Float32 missing_value 1.0e+20;
    String units "m s-1";
  }
  PGd_1203 {
    Float32 actual_range 0.0, 9.96921e+36;
    String ioos_category "Other";
    String long_name "Percent Good Pings";
    String units "percent";
  }
  Tx_1211 {
    Float32 actual_range 13.38512, 13.40988;
    String ioos_category "Other";
    String long_name "Temperature";
    Float32 missing_value 1.0e+20;
    String standard_name "sea_water_temperature";
    String units "Degrees Celsius";
  }
  P_1 {
    Float32 actual_range 0.9544911, 0.9603373;
    String ioos_category "Other";
    String long_name "Pressure";
    Float32 missing_value 1.0e+20;
    String standard_name "sea_water_pressure";
    String units "dBar";
  }
  pressure_std {
    Float32 actual_range 0.01859626, 0.02038592;
    String ioos_category "Other";
    String long_name "Pressure Standard Deviation";
    Float32 missing_value 1.0e+20;
    String units "dBar";
  }
  num_pings {
    Int16 actual_range 168, 169;
    String ioos_category "Other";
  }
 }
  NC_GLOBAL {
    String cdm_data_type "TimeSeries";
    String cdm_timeseries_variables "station_id";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String creator_url "https://www.usgs.gov";
    Float64 DELTA_T 180;
    Float64 Easternmost_Easting 36.963897;
    String experiment_name "SC_Harbor";
    String featureType "TimeSeries";
    String frequency "1200kHz";
    Float64 geospatial_lat_max -122.002162;
    Float64 geospatial_lat_min -122.002162;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 36.963897;
    Float64 geospatial_lon_min 36.963897;
    String geospatial_lon_units "degrees_east";
    String history 
"2025-04-06T05:45:44Z (local files)
2025-04-06T05:45:44Z https://cmgds.marine.usgs.gov/tabledap/SC_Harbor_SCH2025_090_11700_nc.das";
    String infoUrl "https://cmgds.marine.usgs.gov/ocean-time-series/";
    String inst_type "RD Instruments Workhorse ADCP";
    String institution "Coastal and Marine Hazards and Resources Program, U.S. Geological Survey";
    Float64 instrument_height_above_bottom 0.5;
    Float64 latitude -122.002162;
    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 Location "Santa Cruz Harbor";
    Float64 longitude 36.963897;
    String NCProperties "version=2,netcdf=4.9.4-development,hdf5=1.14.2";
    Float64 Northernmost_Northing -122.002162;
    String Organization "U.S. Geological Survey";
    String Program "Coastal and Marine Hazards and Resources Program";
    String publisher_url "https://www.usgs.gov";
    String Region "Monterey Bay";
    String SciPi "Stephanie Ross, Kurt Rosenberger";
    Float64 serial_number 21185;
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing -122.002162;
    String summary "Unspecified";
    String time_coverage_end "2025-04-01T03:28:30Z";
    String time_coverage_start "2025-04-01T03:16:30Z";
    String title "SC_Harbor - SCH2025_090_11700";
    Float64 WATER_DEPTH 5;
    Float64 Westernmost_Easting 36.963897;
  }
}

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.

(easy) You can get data by using the dataset's Data Access Form or Subset form. They make 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.

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.