Make A Graph

Dataset Title:	EMODnet Digital Bathymetry (DTM 2018) - FULL - NetCDF
Institution:	On behalf of the EMODnet project, http://www.emodnet-bathymetry.eu/ (Dataset ID: emodnet_bathy_2018_full)
Range:	depth = -7669.6 to 2418.5m
Information:	Summary \| License \| Metadata \| Background \| Data Access Form \| Files

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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:

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:
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[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 {
  LINES {
    Float64 _FillValue NaN;
    Float64 actual_range 14.99947921, 89.99947943000002;
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String ioos_category "Location";
    String long_name "LINES";
    String standard_name "projection_y_coordinate";
    String units "degrees_north";
  }
  COLUMNS {
    Float64 _FillValue NaN;
    Float64 actual_range -35.99947928, 42.999479273333364;
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String ioos_category "Location";
    String long_name "COLUMNS";
    String standard_name "projection_x_coordinate";
    String units "degrees_east";
  }
  depth {
    String _CoordinateAxisType "Height";
    String _CoordinateZisPositive "down";
    Float64 _FillValue NaN;
    Float64 actual_range -7669.6, 2418.5;
    String axis "Z";
    Float64 colorBarMaximum 8000.0;
    Float64 colorBarMinimum -8000.0;
    String colorBarPalette "TopographyDepth";
    Byte element_type 3;
    String esri_pe_string "GEOGCS[\"GCS_WGS_1984\",DATUM[\"D_WGS_1984\",SPHEROID[\"WGS_1984\",6378137,298.257223563]],PRIMEM[\"Greenwich\",0],UNIT[\"Degree\",0.017453292519943295]]";
    Float64 ext_missing_value 9.969209968386869e+36;
    Int32 first_column 1;
    Int32 first_line 1;
    String ioos_category "Location";
    Int32 last_column 7326;
    Int32 last_line 9013;
    Float64 layer_max_value 105.44000244140625;
    Float64 layer_min_value -2853.699951171875;
    String layer_type "DTM";
    String long_name "Depth";
    String positive "down";
    String standard_name "depth";
    String units "m";
    Float64 valid_maximum 29600.400024414066;
    Float64 valid_minimum 9.000488281253638;
  }
  MIN_SOUNDING {
    Float64 _FillValue NaN;
    Float64 actual_range -7492.0, 66.80000000000018;
    Byte element_type 3;
    String esri_pe_string "GEOGCS[\"GCS_WGS_1984\",DATUM[\"D_WGS_1984\",SPHEROID[\"WGS_1984\",6378137,298.257223563]],PRIMEM[\"Greenwich\",0],UNIT[\"Degree\",0.017453292519943295]]";
    Float64 ext_missing_value 32767.0;
    Int32 first_column 1;
    Int32 first_line 1;
    String ioos_category "Unknown";
    Int32 last_column 7326;
    Int32 last_line 9013;
    Float64 layer_max_value -441.70001220703125;
    Float64 layer_min_value -2455.800048828125;
    String layer_type "DQM";
    String long_name "MIN_SOUNDING";
    String units "meter";
    Float64 valid_maximum 20150.999877929688;
    Float64 valid_minimum 9.999511718751819;
  }
  MAX_SOUNDING {
    Float64 _FillValue NaN;
    Float64 actual_range -6303.8, 97.80000000000018;
    Byte element_type 3;
    String esri_pe_string "GEOGCS[\"GCS_WGS_1984\",DATUM[\"D_WGS_1984\",SPHEROID[\"WGS_1984\",6378137,298.257223563]],PRIMEM[\"Greenwich\",0],UNIT[\"Degree\",0.017453292519943295]]";
    Float64 ext_missing_value 32767.0;
    Int32 first_column 1;
    Int32 first_line 1;
    String ioos_category "Unknown";
    Int32 last_column 7326;
    Int32 last_line 9013;
    Float64 layer_max_value -439.1000061035156;
    Float64 layer_min_value -2450.0;
    String layer_type "DQM";
    String long_name "MAX_SOUNDING";
    String units "meter";
    Float64 valid_maximum 20118.999938964844;
    Float64 valid_minimum 10.0;
  }
  VSOUNDINGS {
    Int32 _FillValue 2147483647;
    Int32 actual_range 0, 32767;
    Byte element_type 4;
    String esri_pe_string "GEOGCS[\"GCS_WGS_1984\",DATUM[\"D_WGS_1984\",SPHEROID[\"WGS_1984\",6378137,298.257223563]],PRIMEM[\"Greenwich\",0],UNIT[\"Degree\",0.017453292519943295]]";
    Float64 ext_missing_value 2.147483647e+9;
    Int32 first_column 1;
    Int32 first_line 1;
    String ioos_category "Unknown";
    Int32 last_column 7326;
    Int32 last_line 9013;
    Float64 layer_max_value 4.0;
    Float64 layer_min_value 1.0;
    String layer_type "DQM";
    String long_name "VSOUNDINGS";
    Float64 valid_maximum 4.0;
    Float64 valid_minimum 1.0;
  }
  STDEV {
    Float64 _FillValue NaN;
    Float64 actual_range 0.0, 696850.0;
    Byte element_type 3;
    String esri_pe_string "GEOGCS[\"GCS_WGS_1984\",DATUM[\"D_WGS_1984\",SPHEROID[\"WGS_1984\",6378137,298.257223563]],PRIMEM[\"Greenwich\",0],UNIT[\"Degree\",0.017453292519943295]]";
    Float64 ext_missing_value 9.969209968386869e+36;
    Int32 first_column 1;
    Int32 first_line 1;
    String ioos_category "Unknown";
    Int32 last_column 7326;
    Int32 last_line 9013;
    Float64 layer_max_value 102.31999969482422;
    Float64 layer_min_value 0.0;
    String layer_type "DQM";
    String long_name "STDEV";
    Float64 valid_maximum 20663.999938964844;
    Float64 valid_minimum 200.0;
  }
  CDI {
    Float64 _FillValue NaN;
    Float64 actual_range 0.0, 2809.0;
    Byte element_type 3;
    String esri_pe_string "GEOGCS[\"GCS_WGS_1984\",DATUM[\"D_WGS_1984\",SPHEROID[\"WGS_1984\",6378137,298.257223563]],PRIMEM[\"Greenwich\",0],UNIT[\"Degree\",0.017453292519943295]]";
    Float64 ext_missing_value 32767.0;
    Int32 first_column 1;
    Int32 first_line 1;
    String ioos_category "Unknown";
    Int32 last_column 7326;
    Int32 last_line 9013;
    Float64 layer_max_value 2.0;
    Float64 layer_min_value 0.0;
    String layer_type "DQM";
    String long_name "CDI";
    Float64 valid_maximum 3000.0;
    Float64 valid_minimum 1000.0;
  }
  DEPTH_SMOOTH {
    Float64 _FillValue NaN;
    Float64 actual_range -7305.8, 2234.5;
    Float64 colorBarMaximum 8000.0;
    Float64 colorBarMinimum -8000.0;
    String colorBarPalette "TopographyDepth";
    Byte element_type 3;
    String esri_pe_string "GEOGCS[\"GCS_WGS_1984\",DATUM[\"D_WGS_1984\",SPHEROID[\"WGS_1984\",6378137,298.257223563]],PRIMEM[\"Greenwich\",0],UNIT[\"Degree\",0.017453292519943295]]";
    Float64 ext_missing_value 9.969209968386869e+36;
    Int32 first_column 1;
    Int32 first_line 1;
    String ioos_category "Location";
    Int32 last_column 7326;
    Int32 last_line 9013;
    Float64 layer_max_value 41.86000061035156;
    Float64 layer_min_value -2793.110107421875;
    String layer_type "DTM";
    String long_name "DEPTH_SMOOTH";
    String standard_name "depth";
    String units "meter";
    Float64 valid_maximum 28359.60000610352;
    Float64 valid_minimum 9.898925781253638;
  }
  DEPTH_SMOOTH_OFFSET {
    Float64 _FillValue NaN;
    Float64 actual_range 0.0, 2238000.0;
    Float64 colorBarMaximum 8000.0;
    Float64 colorBarMinimum -8000.0;
    String colorBarPalette "TopographyDepth";
    Byte element_type 3;
    String esri_pe_string "GEOGCS[\"GCS_WGS_1984\",DATUM[\"D_WGS_1984\",SPHEROID[\"WGS_1984\",6378137,298.257223563]],PRIMEM[\"Greenwich\",0],UNIT[\"Degree\",0.017453292519943295]]";
    Float64 ext_missing_value 9.969209968386869e+36;
    Int32 first_column 1;
    Int32 first_line 1;
    String ioos_category "Location";
    Int32 last_column 7326;
    Int32 last_line 9013;
    Float64 layer_max_value Infinity;
    Float64 layer_min_value 0.0;
    String layer_type "DTM";
    String long_name "DEPTH_SMOOTH_OFFSET";
    String standard_name "depth";
    String units "meter";
    Float64 valid_maximum Infinity;
    Float64 valid_minimum 0.0;
  }
  INTERPOLATION_FLAG {
    Byte _FillValue 127;
    String _Unsigned "false";
    Byte actual_range 0, 1;
    Float64 colorBarMaximum 150.0;
    Float64 colorBarMinimum 0.0;
    Byte element_type 1;
    String esri_pe_string "GEOGCS[\"GCS_WGS_1984\",DATUM[\"D_WGS_1984\",SPHEROID[\"WGS_1984\",6378137,298.257223563]],PRIMEM[\"Greenwich\",0],UNIT[\"Degree\",0.017453292519943295]]";
    Float64 ext_missing_value 127.0;
    Int32 first_column 1;
    Int32 first_line 1;
    String ioos_category "Quality";
    Int32 last_column 7326;
    Int32 last_line 9013;
    Float64 layer_max_value 1.0;
    Float64 layer_min_value 0.0;
    String layer_type "DQM";
    String long_name "INTERPOLATION_FLAG";
    Float64 valid_maximum 1.0;
    Float64 valid_minimum 0.0;
  }
 }
  NC_GLOBAL {
    String cdm_data_type "Other";
    Int32 CIB_BLOCKS_FOR_UNLIMITED 1;
    String Conventions "CF-1.6, COARDS, ACDD-1.3";
    Float64 Element_x_size 0.00104166666666667;
    Float64 Element_y_size 0.00104166666666667;
    Float64 geospatial_vertical_max 2418.5;
    Float64 geospatial_vertical_min -7669.6;
    String geospatial_vertical_positive "down";
    String geospatial_vertical_units "m";
    String history 
"2024-04-23T12:35:15Z (local files)
2024-04-23T12:35:15Z https://erddap.emodnet.eu/tabledap/emodnet_bathy_2018_full.das";
    String infoUrl "https://www.seadatanet.org/";
    String institution "On behalf of the EMODnet project, http://www.emodnet-bathymetry.eu/";
    String keywords "cdi, columns, coordinate, data, depth, DEPTH_SMOOTH, DEPTH_SMOOTH_OFFSET, deviation, flag, interpolation, INTERPOLATION_FLAG, lines, local, max, MAX_SOUNDING, min, MIN_SOUNDING, offset, projection, projection_x_coordinate, projection_y_coordinate, quality, smooth, sounding, source, standard, standard deviation, stdev, vsoundings";
    Float64 Latitude_BL 14.998958376666668;
    Float64 Latitude_BR 14.998958376666668;
    Float64 Latitude_TL 24.38750004333336;
    Float64 Latitude_TR 24.38750004333336;
    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 Longitude_BL 35.261458446666666;
    Float64 Longitude_BR 42.89270844666669;
    Float64 Longitude_TL 35.261458446666666;
    Float64 Longitude_TR 42.89270844666669;
    Float64 mbEastLongitude 42.892708473333336;
    Float64 mbEllipsoidA 6378137.0;
    Float64 mbEllipsoidE2 0.00669437999014133;
    Float64 mbEllipsoidInvF 0.003352810664747463;
    String mbEllipsoidName "WGS-84";
    Int32 mbEndDate 0;
    Int32 mbEndTime 0;
    Int16 mbLevel 0;
    String mbName "H8_2018-export";
    Int16 mbNbrHistoryRec 1;
    Float64 mbNorthLatitude 24.38750007333333;
    String mbProj4String "+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs";
    Int16 mbProjType -1;
    Float64 mbSouthLatitude 14.998958376666668;
    Int32 mbStartDate 0;
    Int32 mbStartTime 0;
    String mbTimeReference "Julian date for 1970/01/01 = 2 440 588";
    Int16 mbVersion 200;
    Float64 mbWestLongitude 35.261458446666666;
    Int32 Number_columns 7326;
    Int32 Number_layers 9;
    Int32 Number_lines 9013;
    Float32 Orientation 0.0;
    Int16 Sounder_type 0;
    String sourceUrl "(local files)";
    String standard_name_vocabulary "CF Standard Name Table v70";
    String summary "The data in the EMODnet Grid should not be used for navigation or any purpose relating to safety at sea.";
    String title "EMODnet Digital Bathymetry (DTM 2018) - FULL - NetCDF";
    String Type "DTM";
    Float64 Xmax_metric 42.89270844666669;
    Float64 Xmin_metric 35.261458446666666;
    Float64 Ymax_metric 24.38750004333336;
    Float64 Ymin_metric 14.998958376666668;
  }
}

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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