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Dataset Title:	MDDNR Nutrient Challenge, Arundel on the Bay
Institution:	Maryland Department of Natural Resources (MDDNR) (Dataset ID: mddnr_nutrient_challenge_arundel)
Range:	longitude = -76.4584 to -76.4584°E, latitude = 38.9168 to 38.9168°N, depth = 1.0 to 1.0m, time = 2018-10-02T15:36:33Z to 2019-01-03T03:57:57Z
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| 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:

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 {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.538494593e+9, 1.546487877e+9;
    String axis "T";
    String ioos_category "Time";
    String long_name "time of observation";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 actual_range -76.4584, -76.4584;
    String axis "X";
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String ioos_category "Location";
    String long_name "station longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  NO3 {
    Float64 _FillValue -9999.0;
    Float64 actual_range 0.011422859998572144, 634.5398729206826;
    Float64 colorBarMaximum 50.0;
    Float64 colorBarMinimum 0.0;
    String coverage_content_type "physicalMeasurement";
    String ioos_category "Dissolved Nutrients";
    String long_name "NO3";
    String standard_name "mole_concentration_of_nitrate_in_sea_water";
    String units "mol m-3";
  }
  PO4 {
    Float64 _FillValue -9999.0;
    Float64 actual_range -0.011131094607684858, 0.17936712948014208;
    Float64 colorBarMaximum 4.0;
    Float64 colorBarMinimum 0.0;
    String coverage_content_type "physicalMeasurement";
    String ioos_category "Dissolved Nutrients";
    String long_name "PO4";
    String standard_name "mole_concentration_of_phosphate_in_sea_water";
    String units "mol m-3";
  }
  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";
    String ioos_category "Location";
    String long_name "depth of the sensor relative to sea surface";
    String positive "down";
    String standard_name "depth";
    String units "m";
  }
  station_id {
    String cf_role "timeseries_id";
    String ioos_category "Identifier";
    String long_name "Platform Name";
    String standard_name "platform_name";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 actual_range 38.9168, 38.9168;
    String axis "Y";
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String ioos_category "Location";
    String long_name "station latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
 }
  NC_GLOBAL {
    String cdm_data_type "TimeSeries";
    String cdm_timeseries_variables "station_id, latitude, longitude";
    String Conventions "CF-1.6, ACDD-1.3, COARDS";
    String creator_email "eyesonthebay.dnr@maryland.gov";
    String creator_name "Maryland Department of Natural Resources Tidewater Ecosystem Assessment Division";
    String creator_url "http://eyesonthebay.dnr.maryland.gov/";
    String date_created "2019-01-03T23:47:03Z";
    String date_issued "2019-01-03T23:47:03Z";
    String date_metadata_modified "2019-01-03T23:47:03Z";
    String date_modified "2019-01-03T23:47:03Z";
    Float64 Easternmost_Easting -76.4584;
    String featureType "TimeSeries";
    String geospatial_bounds "POINT(38.9168 -76.4584)";
    String geospatial_bounds_crs "EPSG:4326";
    String geospatial_bounds_vertical_crs "EPSG:4297";
    Float64 geospatial_lat_max 38.9168;
    Float64 geospatial_lat_min 38.9168;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -76.4584;
    Float64 geospatial_lon_min -76.4584;
    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 
"Thu Jan 13 18:19:24 2022: ncatted -O -a platform,global,c,c,fixed /data/mddnr_nutrient_challenge/Arundel_on_the_Bay/Arundel_on_the_Bay_20190103.nc /data/mddnr_nutrient_challenge/Arundel_on_the_Bay/Arundel_on_the_Bay_20190103.nc
Wed Jan  9 09:49:29 2019: ncatted -O -a valid_max,,d,, ./Arundel_on_the_Bay/Arundel_on_the_Bay_20190103.nc ./Arundel_on_the_Bay/Arundel_on_the_Bay_20190103.nc
Wed Jan  9 09:48:46 2019: ncatted -O -a valid_min,,d,, ./Arundel_on_the_Bay/Arundel_on_the_Bay_20190103.nc ./Arundel_on_the_Bay/Arundel_on_the_Bay_20190103.nc
Created by the RPS harvester from data at 'http://eyesonthebay.dnr.maryland.gov/contmon/csvforcedownload_remotenutrientsensor.cfm?' on 20190103 23:47 
2024-10-31T03:56:03Z (local files)
2024-10-31T03:56:03Z http://erddap.maracoos.org/tabledap/mddnr_nutrient_challenge_arundel.das";
    String id "XGF5025";
    String infoUrl "http://eyesonthebay.dnr.maryland.gov/contmon/NutrientSensor.cfm";
    String institution "Maryland Department of Natural Resources (MDDNR)";
    String keywords "bay, beach, challenge, chemistry, chesapeake, concentration, dares, data, department, depth, dissolved, dissolved nutrients, earth, Earth Science > Oceans > Ocean Chemistry > Nitrate, Earth Science > Oceans > Ocean Chemistry > Phosphate, identifier, latitude, longitude, maryland, mddnr, mole, mole_concentration_of_nitrate_in_sea_water, mole_concentration_of_phosphate_in_sea_water, n02, name, natural, nitrate, no3, nutrient, nutrients, observation, ocean, oceans, phosphate, pier, platform, platform_name, po4, relative, resources, science, sea, seawater, segment, sensor, station_name, surface, time, u, u'Oceans > Ocean Chemistry > Nitrate'u'Oceans > Ocean Chemistry > Phosphate', water";
    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 naming_authority "maryland.dnr";
    String NCO "netCDF Operators version 4.7.5 (Homepage = http://nco.sf.net, Code = https://github.com/nco/nco)";
    String nodc_template_version "NODC_NetCDF_TimeSeries_Orthogonal_Template_v2.0";
    Float64 Northernmost_Northing 38.9168;
    String platform "fixed";
    String project "Nutrient Sensor Action Challenge";
    String publisher_email "devops@asascience.com";
    String publisher_institution "MARACOOS";
    String publisher_name "MARACOOS";
    String publisher_phone "(401) 789-6224";
    String publisher_type "institution";
    String publisher_url "http://www.maracoos.org";
    String references "http://eyesonthebay.dnr.maryland.gov/contmon/nutrientsensor.cfm";
    String source "http://eyesonthebay.dnr.maryland.gov/";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 38.9168;
    String standard_name_vocabulary "CF Standard Name Table v55";
    String subsetVariables "longitude, NO3, PO4, depth, station_id, latitude";
    String summary "Station Arundel on the Bay, MDDNR Nutrient Challenge";
    String time_coverage_duration "PT7201S";
    String time_coverage_end "2019-01-03T03:57:57Z";
    String time_coverage_resolution "PT7201S";
    String time_coverage_start "2018-10-02T15:36:33Z";
    String title "MDDNR Nutrient Challenge, Arundel on the Bay";
    Float64 Westernmost_Easting -76.4584;
  }
}

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.

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