Make A Graph

Dataset Title:	[Winter survey data from Lake Erie from Nov 2024 to Mar 2025] - Environmental observations, physico-chemical data, chlorophyll, total and dissolved nutrients, plankton taxonomic classification, and cell abundance from surveys of Lake Erie from November 2024 to March 2025 (Lake Erie Center for Fresh Waters and Human Health)
Institution:	BCO-DMO (Dataset ID: bcodmo_dataset_1006222_v1)
Range:	longitude = -82.667 to -80.642°E, latitude = 41.715 to 42.57°N, depth = 1.0 to 1.0m
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Data Access Form \| Files

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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 {
  station {
    String long_name "Station";
    String units "unitless";
  }
  lake {
    String long_name "Lake";
    String units "unitless";
  }
  date {
    String long_name "Date";
    String units "unitless";
  }
  time_edt {
    String long_name "Time_edt";
    String units "unitless";
  }
  ISO_DateTime_Local {
    String long_name "Iso_datetime_local";
    String units "unitless";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float32 actual_range 41.715, 42.57;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Latitude_dec_deg";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float32 actual_range -82.667, -80.642;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude_dec_deg";
    String standard_name "longitude";
    String units "degrees_east";
  }
  lat_long {
    String long_name "Lat_long";
    String units "decimal degrees";
  }
  depth {
    String _CoordinateAxisType "Height";
    String _CoordinateZisPositive "down";
    Int32 actual_range 1, 1;
    String axis "Z";
    String ioos_category "Location";
    String long_name "Sample_depth";
    String positive "down";
    String standard_name "depth";
    String units "m";
  }
  station_depth {
    Float32 actual_range 1.0, 26.0;
    String long_name "Station_depth";
    String units "meters";
  }
  air_temp {
    Float32 actual_range -11.0, 12.0;
    String long_name "Air_temp";
    String units "degrees Celsius";
  }
  water_temp {
    Float32 actual_range 0.0, 16.26;
    String long_name "Water_temp";
    String units "degrees Celsius";
  }
  snow_thickness {
    Float32 actual_range 0.0, 1.0;
    String long_name "Snow_thickness";
    String units "inches";
  }
  snow_cover_percent {
    Int32 actual_range 0, 80;
    String long_name "Snow_cover_percent";
    String units "percent (%)";
  }
  ice_thickness {
    String long_name "Ice_thickness";
    String units "inches";
  }
  ice_cover_percent {
    Int32 actual_range 0, 100;
    String long_name "Ice_cover_percent";
    String units "percent (%)";
  }
  ice_narrative {
    String long_name "Ice_narrative";
    String units "unitless";
  }
  wind_speed {
    String long_name "Wind_speed";
    String units "knots";
  }
  wind_direction {
    String long_name "Wind_direction";
    String units "unitless";
  }
  barometer {
    Float32 actual_range 29.16, 35.05;
    String long_name "Barometer";
    String units "inches Hg";
  }
  cloud_cover_percent {
    Int32 actual_range 0, 100;
    String long_name "Cloud_cover_percent";
    String units "percent (%)";
  }
  wave_height {
    Float32 actual_range 0.0, 2.0;
    String long_name "Wave_height";
    String units "meters";
  }
  ph {
    Float32 actual_range 8.26, 9.35;
    String long_name "Ph";
    String units "unitless";
  }
  dissolved_oxygen_percent {
    Float32 actual_range 93.8, 104.3;
    String long_name "Dissolved_oxygen_percent";
    String units "percent (%)";
  }
  dissolved_oxygen {
    Float32 actual_range 9.51, 15.2;
    String long_name "Dissolved_oxygen";
    String units "milligrams per liter (mg L-1)";
  }
  secchi_down_up {
    String long_name "Secchi_down_up";
    String units "meters";
  }
  ammonia {
    Float32 actual_range -0.003, 0.12;
    String long_name "Ammonia";
    String units "milligrams per liter (mg L-1)";
  }
  chloride {
    Float32 actual_range 12.4, 19.9;
    String long_name "Chloride";
    String units "milligrams per liter (mg L-1)";
  }
  sulfate {
    Float32 actual_range 16.3, 19.8;
    String long_name "Sulfate";
    String units "milligrams per liter (mg L-1)";
  }
  nitrite {
    Float32 actual_range 0.0, 0.017;
    String long_name "Nitrite";
    String units "milligrams per liter (mg L-1)";
  }
  nitrate {
    Float32 actual_range 0.0, 0.431;
    String long_name "Nitrate";
    String units "milligrams per liter (mg L-1)";
  }
  silica {
    Float32 actual_range 0.045, 2.32;
    String long_name "Silica";
    String units "milligrams per liter (mg L-1)";
  }
  soluble_reactive_phosphorus {
    Float32 actual_range -0.001, 0.028;
    String long_name "Soluble_reactive_phosphorus";
    String units "milligrams per liter (mg L-1)";
  }
  fluoride {
    Float32 actual_range 0.03, 0.07;
    String long_name "Fluoride";
    String units "milligrams per liter (mg L-1)";
  }
  total_phosphorus {
    Float32 actual_range 0.016, 0.08;
    String long_name "Total_phosphorus";
    String units "milligrams per liter (mg L-1)";
  }
  total_nitrogen {
    Float32 actual_range 0.248, 0.352;
    String long_name "Total_nitrogen";
    String units "milligrams per liter (mg L-1)";
  }
  conductivity {
    Float32 actual_range 225.0, 288.0;
    String long_name "Conductivity";
    String units "molar conductivity";
  }
  chlorophyll_a_gt_0_45_um {
    Float32 actual_range 0.86, 36.74;
    String long_name "Chlorophyll_a_gt_0_45_um";
    String units "micrograms per liter (ug L-1)";
  }
  chlorophyll_a_gt_20_um {
    Float32 actual_range 0.11, 7.57;
    String long_name "Chlorophyll_a_gt_20_um";
    String units "micrograms per liter (ug L-1)";
  }
  amphora_spp {
    Int32 actual_range 0, 136;
    String long_name "Amphora_spp";
    String units "Cells per mL (cells ml-1)";
  }
  achnanthidium_spp {
    Int32 actual_range 0, 24;
    String long_name "Achnanthidium_spp";
    String units "Cells per mL (cells ml-1)";
  }
  asterionella_formosa {
    Int32 actual_range 0, 2002;
    String long_name "Asterionella_formosa";
    String units "Cells per mL (cells ml-1)";
  }
  aulacoseira_spp {
    Int32 actual_range 0, 2584;
    String long_name "Aulacoseira_spp";
    String units "Cells per mL (cells ml-1)";
  }
  diatom_centric {
    Int32 actual_range 0, 9100;
    String long_name "Diatom_centric";
    String units "Cells per mL (cells ml-1)";
  }
  cocconeis_spp {
    Int32 actual_range 0, 2;
    String long_name "Cocconeis_spp";
    String units "Cells per mL (cells ml-1)";
  }
  diatoma_spp {
    Int32 actual_range 0, 300;
    String long_name "Diatoma_spp";
    String units "Cells per mL (cells ml-1)";
  }
  fragilaria_spp {
    Int32 actual_range 0, 965;
    String long_name "Fragilaria_spp";
    String units "Cells per mL (cells ml-1)";
  }
  gomphonema_sp {
    Int32 actual_range 0, 1;
    String long_name "Gomphonema_sp";
    String units "Cells per mL (cells ml-1)";
  }
  navicula_spp {
    Int32 actual_range 0, 18;
    String long_name "Navicula_spp";
    String units "Cells per mL (cells ml-1)";
  }
  nitzschia_sp {
    Int32 actual_range 0, 20;
    String long_name "Nitzschia_sp";
    String units "Cells per mL (cells ml-1)";
  }
  placoneis_spp {
    Int32 actual_range 0, 2;
    String long_name "Placoneis_spp";
    String units "Cells per mL (cells ml-1)";
  }
  staurosira_spp {
    Int32 actual_range 0, 7;
    String long_name "Staurosira_spp";
    String units "Cells per mL (cells ml-1)";
  }
  staurosirella_spp {
    Int32 actual_range 0, 14;
    String long_name "Staurosirella_spp";
    String units "Cells per mL (cells ml-1)";
  }
  stephanodiscus_bieranus {
    Int32 actual_range 0, 106;
    String long_name "Stephanodiscus_bieranus";
    String units "Cells per mL (cells ml-1)";
  }
  stephanodiscus_spp {
    Int32 actual_range 0, 1;
    String long_name "Stephanodiscus_spp";
    String units "Cells per mL (cells ml-1)";
  }
  surirella_spp {
    Int32 actual_range 0, 1;
    String long_name "Surirella_spp";
    String units "Cells per mL (cells ml-1)";
  }
  synedra_spp {
    Int32 actual_range 0, 156;
    String long_name "Synedra_spp";
    String units "Cells per mL (cells ml-1)";
  }
  tabellaria_spp {
    Int32 actual_range 0, 1120;
    String long_name "Tabellaria_spp";
    String units "Cells per mL (cells ml-1)";
  }
  microflagellates {
    Int32 actual_range 0, 1050;
    String long_name "Microflagellates";
    String units "Cells per mL (cells ml-1)";
  }
  cryptophyta {
    Int32 actual_range 0, 860;
    String long_name "Cryptophyta";
    String units "Cells per mL (cells ml-1)";
  }
  pyrrophyta {
    Int32 actual_range 0, 54;
    String long_name "Pyrrophyta";
    String units "Cells per mL (cells ml-1)";
  }
  chrysophyta {
    Int32 actual_range 0, 36;
    String long_name "Chrysophyta";
    String units "Cells per mL (cells ml-1)";
  }
  euglenophyta {
    Int32 actual_range 0, 1;
    String long_name "Euglenophyta";
    String units "Cells per mL (cells ml-1)";
  }
  ankistrodesmus_spp {
    Int32 actual_range 0, 20;
    String long_name "Ankistrodesmus_spp";
    String units "Cells per mL (cells ml-1)";
  }
  schroederia_spp {
    Int32 actual_range 0, 2;
    String long_name "Schroederia_spp";
    String units "Cells per mL (cells ml-1)";
  }
  scenedesmus_spp {
    Int32 actual_range 0, 120;
    String long_name "Scenedesmus_spp";
    String units "Cells per mL (cells ml-1)";
  }
  tetraedron_spp {
    Int32 actual_range 0, 40;
    String long_name "Tetraedron_spp";
    String units "Cells per mL (cells ml-1)";
  }
  closterium_acutum {
    Int32 actual_range 0, 23;
    String long_name "Closterium_acutum";
    String units "Cells per mL (cells ml-1)";
  }
  coccoid_chlorophytes {
    Int32 actual_range 0, 200;
    String long_name "Coccoid_chlorophytes";
    String units "Cells per mL (cells ml-1)";
  }
  coelastrum_spp {
    Int32 actual_range 0, 72;
    String long_name "Coelastrum_spp";
    String units "Cells per mL (cells ml-1)";
  }
  dictyosphaerium_spp {
    Int32 actual_range 0, 61;
    String long_name "Dictyosphaerium_spp";
    String units "Cells per mL (cells ml-1)";
  }
  eudorina_spp {
    Int32 actual_range 0, 29;
    String long_name "Eudorina_spp";
    String units "Cells per mL (cells ml-1)";
  }
  monoraphidium_spp {
    Int32 actual_range 0, 60;
    String long_name "Monoraphidium_spp";
    String units "Cells per mL (cells ml-1)";
  }
  oocystis_spp {
    Int32 actual_range 0, 100;
    String long_name "Oocystis_spp";
    String units "Cells per mL (cells ml-1)";
  }
  oocystidium_spp {
    Int32 actual_range 0, 194;
    String long_name "Oocystidium_spp";
    String units "Cells per mL (cells ml-1)";
  }
  phacotus_spp {
    Int32 actual_range 0, 2;
    String long_name "Phacotus_spp";
    String units "Cells per mL (cells ml-1)";
  }
  pediastrum_spp {
    Int32 actual_range 0, 8;
    String long_name "Pediastrum_spp";
    String units "Cells per mL (cells ml-1)";
  }
  selenastrum_spp {
    Int32 actual_range 0, 320;
    String long_name "Selenastrum_spp";
    String units "Cells per mL (cells ml-1)";
  }
  spermatozopsis_spp {
    Int32 actual_range 0, 1040;
    String long_name "Spermatozopsis_spp";
    String units "Cells per mL (cells ml-1)";
  }
  picoplankton {
    Int32 actual_range 0, 2250;
    String long_name "Picoplankton";
    String units "Cells per mL (cells ml-1)";
  }
  planktolyngbya_spp {
    Int32 actual_range 0, 1324;
    String long_name "Planktolyngbya_spp";
    String units "Cells per mL (cells ml-1)";
  }
  aphanocapsa_spp {
    Int32 actual_range 0, 216;
    String long_name "Aphanocapsa_spp";
    String units "Cells per mL (cells ml-1)";
  }
  aphanothece_spp {
    Int32 actual_range 0, 65;
    String long_name "Aphanothece_spp";
    String units "Cells per mL (cells ml-1)";
  }
  aphanizomenon_spp {
    Int32 actual_range 0, 713;
    String long_name "Aphanizomenon_spp";
    String units "Cells per mL (cells ml-1)";
  }
  chroococcus_microscopicus {
    Int32 actual_range 0, 1440;
    String long_name "Chroococcus_microscopicus";
    String units "Cells per mL (cells ml-1)";
  }
  coccoid_cyanophytes {
    Int32 actual_range 0, 528;
    String long_name "Coccoid_cyanophytes";
    String units "Cells per mL (cells ml-1)";
  }
  coelosphaerium_spp {
    Int32 actual_range 0, 1051;
    String long_name "Coelosphaerium_spp";
    String units "Cells per mL (cells ml-1)";
  }
  dolichospermum_spp {
    Int32 actual_range 0, 178;
    String long_name "Dolichospermum_spp";
    String units "Cells per mL (cells ml-1)";
  }
  phormidium_spp {
    Int32 actual_range 0, 7;
    String long_name "Phormidium_spp";
    String units "Cells per mL (cells ml-1)";
  }
  leptolyngbia_spp {
    Int32 actual_range 0, 94;
    String long_name "Leptolyngbia_spp";
    String units "Cells per mL (cells ml-1)";
  }
  myxobaktron_spp {
    Int32 actual_range 0, 40;
    String long_name "Myxobaktron_spp";
    String units "Cells per mL (cells ml-1)";
  }
  microcystis_spp {
    Int32 actual_range 0, 302;
    String long_name "Microcystis_spp";
    String units "Cells per mL (cells ml-1)";
  }
  merismopedia_tenuissima {
    Int32 actual_range 0, 1680;
    String long_name "Merismopedia_tenuissima";
    String units "Cells per mL (cells ml-1)";
  }
  planktothrix_agardhii {
    Int32 actual_range 0, 1031;
    String long_name "Planktothrix_agardhii";
    String units "Cells per mL (cells ml-1)";
  }
  pseudoanabaena_spp {
    Int32 actual_range 0, 445;
    String long_name "Pseudoanabaena_spp";
    String units "Cells per mL (cells ml-1)";
  }
  synechococcus_spp {
    Int32 actual_range 0, 60;
    String long_name "Synechococcus_spp";
    String units "Cells per mL (cells ml-1)";
  }
  woronichiana_spp {
    Int32 actual_range 0, 540;
    String long_name "Woronichiana_spp";
    String units "Cells per mL (cells ml-1)";
  }
 }
  NC_GLOBAL {
    String cdm_data_type "Other";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String creator_email "info@bco-dmo.org";
    String creator_name "BCO-DMO";
    String creator_url "https://www.bco-dmo.org/";
    String doi "10.26008/1912/bco-dmo.1006222.1";
    Float64 Easternmost_Easting -80.642;
    Float64 geospatial_lat_max 42.57;
    Float64 geospatial_lat_min 41.715;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -80.642;
    Float64 geospatial_lon_min -82.667;
    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 
"2026-10-31T11:41:04Z (local files)
2026-10-31T11:41:04Z https://erddap.bco-dmo.org/tabledap/bcodmo_dataset_1006222_v1.das";
    String infoUrl "https://osprey.bco-dmo.org/dataset/1006222";
    String institution "BCO-DMO";
    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.";
    Float64 Northernmost_Northing 42.57;
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 41.715;
    String summary "This dataset includes winter survey data from Lake Erie collected on USCG Morro Bay, CCGS Griffon, CCGS Samuel Risley, and MV Vigilant from November 2024 to March 2025. The survey includes environmental observations, physico-chemical data, chlorophyll, total and dissolved nutrients, plankton taxonomic classification, and cell abundance. The Lake Erie Center for Fresh Waters and Human Health is a multi-institutional effort aimed at understanding the environmental factors and ongoing changes that influence the growth and toxicity of cyanobacterial harmful algal blooms (cHABs) in Lake Erie.";
    String title "[Winter survey data from Lake Erie from Nov 2024 to Mar 2025] - Environmental observations, physico-chemical data, chlorophyll, total and dissolved nutrients, plankton taxonomic classification, and cell abundance from surveys of Lake Erie from November 2024 to March 2025 (Lake Erie Center for Fresh Waters and Human Health)";
    Float64 Westernmost_Easting -82.667;
  }
}

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.