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Dataset Title:	CRCP_Coral_Demographic_Survey_USVI
Institution:	Coral Reef Conservation Program   (Dataset ID: CRCP_Coral_Demographic_Survey_USVI)
Range:	longitude = -65.14981 to -64.43145°E, latitude = 17.63612 to 18.4152°N, time = 2013-07-08T00:00:00Z to 2023-08-18T00:00:00Z
Information:	Summary | License | Metadata | Background | Data Access Form

 

Graph Type:  lines linesAndMarkers markers sticks vectors X Axis:  time latitude longitude STATION_NR YEAR MONTH DAY Date_UTC WTD_RUG MEAN_RUG MAPGRID_NR SUB_REGION_NR ZONE_NR MIN_DEPTH MAX_DEPTH METERS_COMPLETED MAX_DIAMETER PERP_DIAMETER HEIGHT OLD_MORT RECENT_MORT Y Axis:  time latitude longitude STATION_NR YEAR MONTH DAY Date_UTC WTD_RUG MEAN_RUG MAPGRID_NR SUB_REGION_NR ZONE_NR MIN_DEPTH MAX_DEPTH METERS_COMPLETED MAX_DIAMETER PERP_DIAMETER HEIGHT OLD_MORT RECENT_MORT Color:  time latitude longitude STATION_NR YEAR MONTH DAY Date_UTC WTD_RUG MEAN_RUG MAPGRID_NR SUB_REGION_NR ZONE_NR MIN_DEPTH MAX_DEPTH METERS_COMPLETED MAX_DIAMETER PERP_DIAMETER HEIGHT OLD_MORT RECENT_MORT   Constraints Optional Constraint #1 Optional Constraint #2 time latitude longitude REGION REGION_DESCRIPTION PRIMARY_SAMPLE_UNIT STATION_NR YEAR MONTH DAY Date_UTC HABITAT_CD HABITAT_TYPE STRAT STRAT_Description RUGOSITY_CD WTD_RUG MEAN_RUG MAPGRID_NR SUB_REGION_NAME SUB_REGION_NAME_DESCRIPTION SUB_REGION_NR ZONE_NAME ZONE_NR MPA_NAME MPA_NR ADMIN Administration_Description PROT DEPTH_STRAT DEPTH_STRAT_DESCRIPTION MIN_DEPTH MAX_DEPTH METERS_COMPLETED SPECIES_CD SPECIES_NAME N JUV MAX_DIAMETER PERP_DIAMETER HEIGHT OLD_MORT RECENT_MORT BLEACH_CONDITION DISEASE accession_url     != =~ <= >= = < >     != =~ <= >= = < > time latitude longitude REGION REGION_DESCRIPTION PRIMARY_SAMPLE_UNIT STATION_NR YEAR MONTH DAY Date_UTC HABITAT_CD HABITAT_TYPE STRAT STRAT_Description RUGOSITY_CD WTD_RUG MEAN_RUG MAPGRID_NR SUB_REGION_NAME SUB_REGION_NAME_DESCRIPTION SUB_REGION_NR ZONE_NAME ZONE_NR MPA_NAME MPA_NR ADMIN Administration_Description PROT DEPTH_STRAT DEPTH_STRAT_DESCRIPTION MIN_DEPTH MAX_DEPTH METERS_COMPLETED SPECIES_CD SPECIES_NAME N JUV MAX_DIAMETER PERP_DIAMETER HEIGHT OLD_MORT RECENT_MORT BLEACH_CONDITION DISEASE accession_url     != =~ <= >= = < >     != =~ <= >= = < > time latitude longitude REGION REGION_DESCRIPTION PRIMARY_SAMPLE_UNIT STATION_NR YEAR MONTH DAY Date_UTC HABITAT_CD HABITAT_TYPE STRAT STRAT_Description RUGOSITY_CD WTD_RUG MEAN_RUG MAPGRID_NR SUB_REGION_NAME SUB_REGION_NAME_DESCRIPTION SUB_REGION_NR ZONE_NAME ZONE_NR MPA_NAME MPA_NR ADMIN Administration_Description PROT DEPTH_STRAT DEPTH_STRAT_DESCRIPTION MIN_DEPTH MAX_DEPTH METERS_COMPLETED SPECIES_CD SPECIES_NAME N JUV MAX_DIAMETER PERP_DIAMETER HEIGHT OLD_MORT RECENT_MORT BLEACH_CONDITION DISEASE accession_url     != =~ <= >= = < >     != =~ <= >= = < > time latitude longitude REGION REGION_DESCRIPTION PRIMARY_SAMPLE_UNIT STATION_NR YEAR MONTH DAY Date_UTC HABITAT_CD HABITAT_TYPE STRAT STRAT_Description RUGOSITY_CD WTD_RUG MEAN_RUG MAPGRID_NR SUB_REGION_NAME SUB_REGION_NAME_DESCRIPTION SUB_REGION_NR ZONE_NAME ZONE_NR MPA_NAME MPA_NR ADMIN Administration_Description PROT DEPTH_STRAT DEPTH_STRAT_DESCRIPTION MIN_DEPTH MAX_DEPTH METERS_COMPLETED SPECIES_CD SPECIES_NAME N JUV MAX_DIAMETER PERP_DIAMETER HEIGHT OLD_MORT RECENT_MORT BLEACH_CONDITION DISEASE accession_url     != =~ <= >= = < >     != =~ <= >= = < > time latitude longitude REGION REGION_DESCRIPTION PRIMARY_SAMPLE_UNIT STATION_NR YEAR MONTH DAY Date_UTC HABITAT_CD HABITAT_TYPE STRAT STRAT_Description RUGOSITY_CD WTD_RUG MEAN_RUG MAPGRID_NR SUB_REGION_NAME SUB_REGION_NAME_DESCRIPTION SUB_REGION_NR ZONE_NAME ZONE_NR MPA_NAME MPA_NR ADMIN Administration_Description PROT DEPTH_STRAT DEPTH_STRAT_DESCRIPTION MIN_DEPTH MAX_DEPTH METERS_COMPLETED SPECIES_CD SPECIES_NAME N JUV MAX_DIAMETER PERP_DIAMETER HEIGHT OLD_MORT RECENT_MORT BLEACH_CONDITION DISEASE accession_url     != =~ <= >= = < >     != =~ <= >= = < >   Server-side Functions  distinct() orderBy orderByDescending orderByClosest orderByCount orderByLimit orderByMax orderByMin orderByMinMax orderByMean orderBySum (" time latitude longitude REGION REGION_DESCRIPTION PRIMARY_SAMPLE_UNIT STATION_NR YEAR MONTH DAY Date_UTC HABITAT_CD HABITAT_TYPE STRAT STRAT_Description RUGOSITY_CD WTD_RUG MEAN_RUG MAPGRID_NR SUB_REGION_NAME SUB_REGION_NAME_DESCRIPTION SUB_REGION_NR ZONE_NAME ZONE_NR MPA_NAME MPA_NR ADMIN Administration_Description PROT DEPTH_STRAT DEPTH_STRAT_DESCRIPTION MIN_DEPTH MAX_DEPTH METERS_COMPLETED SPECIES_CD SPECIES_NAME N JUV MAX_DIAMETER PERP_DIAMETER HEIGHT OLD_MORT RECENT_MORT BLEACH_CONDITION DISEASE accession_url time latitude longitude REGION REGION_DESCRIPTION PRIMARY_SAMPLE_UNIT STATION_NR YEAR MONTH DAY Date_UTC HABITAT_CD HABITAT_TYPE STRAT STRAT_Description RUGOSITY_CD WTD_RUG MEAN_RUG MAPGRID_NR SUB_REGION_NAME SUB_REGION_NAME_DESCRIPTION SUB_REGION_NR ZONE_NAME ZONE_NR MPA_NAME MPA_NR ADMIN Administration_Description PROT DEPTH_STRAT DEPTH_STRAT_DESCRIPTION MIN_DEPTH MAX_DEPTH METERS_COMPLETED SPECIES_CD SPECIES_NAME N JUV MAX_DIAMETER PERP_DIAMETER HEIGHT OLD_MORT RECENT_MORT BLEACH_CONDITION DISEASE accession_url time latitude longitude REGION REGION_DESCRIPTION PRIMARY_SAMPLE_UNIT STATION_NR YEAR MONTH DAY Date_UTC HABITAT_CD HABITAT_TYPE STRAT STRAT_Description RUGOSITY_CD WTD_RUG MEAN_RUG MAPGRID_NR SUB_REGION_NAME SUB_REGION_NAME_DESCRIPTION SUB_REGION_NR ZONE_NAME ZONE_NR MPA_NAME MPA_NR ADMIN Administration_Description PROT DEPTH_STRAT DEPTH_STRAT_DESCRIPTION MIN_DEPTH MAX_DEPTH METERS_COMPLETED SPECIES_CD SPECIES_NAME N JUV MAX_DIAMETER PERP_DIAMETER HEIGHT OLD_MORT RECENT_MORT BLEACH_CONDITION DISEASE accession_url time latitude longitude REGION REGION_DESCRIPTION PRIMARY_SAMPLE_UNIT STATION_NR YEAR MONTH DAY Date_UTC HABITAT_CD HABITAT_TYPE STRAT STRAT_Description RUGOSITY_CD WTD_RUG MEAN_RUG MAPGRID_NR SUB_REGION_NAME SUB_REGION_NAME_DESCRIPTION SUB_REGION_NR ZONE_NAME ZONE_NR MPA_NAME MPA_NR ADMIN Administration_Description PROT DEPTH_STRAT DEPTH_STRAT_DESCRIPTION MIN_DEPTH MAX_DEPTH METERS_COMPLETED SPECIES_CD SPECIES_NAME N JUV MAX_DIAMETER PERP_DIAMETER HEIGHT OLD_MORT RECENT_MORT BLEACH_CONDITION DISEASE accession_url ")   Graph Settings Marker Type:  None Plus X Dot Square Filled Square Circle Filled Circle Up Triangle Filled Up Triangle Borderless Filled Square Borderless Filled Circle Borderless Filled Up Triangle  Size:  3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Color:  Color Bar:  BlackBlueWhite BlackGreenWhite BlackRedWhite BlackWhite BlueWhiteRed BlueWideWhiteRed LightRainbow Ocean OceanDepth Rainbow Rainbow2 Rainfall ReverseRainbow RedWhiteBlue RedWhiteBlue2 RedWideWhiteBlue Spectrum Topography TopographyDepth WhiteBlueBlack WhiteGreenBlack WhiteRedBlack WhiteBlack YellowRed KT_algae KT_amp KT_balance KT_curl KT_deep KT_delta KT_dense KT_gray KT_haline KT_ice KT_matter KT_oxy KT_phase KT_solar KT_speed KT_tempo KT_thermal KT_turbid  Continuity:  Continuous Discrete  Scale:  Linear Log    Minimum:   Maximum:   N Sections:  2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 Draw land mask:  under over outline off Y Axis Minimum:   Maximum:    Ascending Descending Linear Log   Redraw the Graph (Please be patient. It may take a while to get the data.)   Optional: Then set the File Type: .asc .csv .csvp .csv0 .dataTable .das .dds .dods .esriCsv .fgdc .geoJson .graph .help .html .htmlTable .iso19115 .itx .json .jsonlCSV1 .jsonlCSV .jsonlKVP .mat .nc .ncHeader .ncCF .ncCFHeader .ncCFMA .ncCFMAHeader .nccsv .nccsvMetadata .ncoJson .odvTxt .subset .tsv .tsvp .tsv0 .wav .xhtml .kml .smallPdf .pdf .largePdf .smallPng .png .largePng .transparentPng (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:  1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 second(s) minute(s) hour(s) day(s) month(s) year(s)

 

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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.
   

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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.3732416e+9, 1.6923168e+9;
    String axis "T";
    String calendar "Julian";
    String ioos_category "Time";
    String long_name "Time";
    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 _FillValue -9999.0;
    Float64 actual_range 17.63612, 18.4152;
    String axis "Y";
    String comment "Latitudinal location where station was surveyed. Precise to 6 decimal places.";
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
    Float64 valid_max 18.40364;
    Float64 valid_min 17.66737;
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 _FillValue -9999.0;
    Float64 actual_range -65.14981, -64.43145;
    String axis "X";
    String comment "Longitudinal location where station was surveyed. Precise to 6 decimal places.";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
    Float64 valid_max -64.60288;
    Float64 valid_min -65.13959;
  }
  REGION {
    String comment "A code indicating the region in which a sample was taken.";
    String ioos_category "Location";
  }
  REGION_DESCRIPTION {
    String comment "The long description for the region code in which a sample was taken";
    String ioos_category "Location";
  }
  PRIMARY_SAMPLE_UNIT {
    String comment "A code indicating the primary sample unit in which a sample was collected.";
    String ioos_category "Identifier";
  }
  STATION_NR {
    Int32 _FillValue -9999;
    Int32 actual_range 1, 1;
    String comment "A number indicating the secondary sampling unit within a given primary sample unit.";
    String ioos_category "Identifier";
  }
  YEAR {
    Int32 _FillValue -9999;
    Int32 actual_range 2013, 2023;
    String comment "The year the survey was done";
    String ioos_category "Time";
  }
  MONTH {
    Int32 _FillValue -9999;
    Int32 actual_range 6, 8;
    String comment "A number indicating the month of the year.";
    String ioos_category "Time";
  }
  DAY {
    Int32 _FillValue -9999;
    Int32 actual_range 1, 31;
    String comment "Numeric day for the temperature observation, 1-31 (TIMESTAMP)";
    String ioos_category "Time";
  }
  Date_UTC {
    Float64 actual_range 1.3732416e+9, 1.6923168e+9;
    String comment "Date the observation was made or sample was collected.";
    String ioos_category "Time";
    String long_name "Date UTC";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  HABITAT_CD {
    String comment "A code indicating the habitat type.";
    String ioos_category "Bottom Character";
  }
  HABITAT_TYPE {
    String comment "Full description of the HABITAT_CD code describing the habitat type";
    String ioos_category "Bottom Character";
  }
  STRAT {
    String comment "A code indicating the stratum in which a sample was taken. Differs by region.";
    String ioos_category "Bottom Character";
  }
  STRAT_Description {
    String comment "Long description for the stratum in which a sample was name";
    String ioos_category "Bottom Character";
  }
  RUGOSITY_CD {
    String comment "A code classifying a sample as rugose(1) or not rugose(0).  This field applies to SEFCRI region only for better stratification and is populated with not applicable in all other survey locations";
    String ioos_category "Bottom Character";
  }
  WTD_RUG {
    Float64 _FillValue -9999.0;
    Float64 actual_range 0.1, 3.133333333;
    String comment "A number indicating the weighted rugosity, in m, of the secondary sampling unit";
    String ioos_category "Bottom Character";
  }
  MEAN_RUG {
    Float64 _FillValue -9999.0;
    Float64 actual_range 0.0, 3.392666667;
    String comment "A number indicating the mean rugosity, in m, of the secondary sampling unit";
    String ioos_category "Bottom Character";
    String units "m";
  }
  MAPGRID_NR {
    Int32 _FillValue -9999;
    Int32 actual_range 19887, 1040966;
    String comment "A number indicating gridded shapefile number";
    String ioos_category "Identifier";
  }
  SUB_REGION_NAME {
    String comment "The name of the subregion in which a sample was taken.";
    String ioos_category "Location";
  }
  SUB_REGION_NAME_DESCRIPTION {
    String comment "Long description for the name of the subregion in which a sample was taken.";
    String ioos_category "Location";
  }
  SUB_REGION_NR {
    Int32 _FillValue -9999;
    String comment "A number indicating the subregion in which a sample was taken.";
    String ioos_category "Location";
  }
  ZONE_NAME {
    String comment "Long description for the ZONE_NR field.";
    String ioos_category "Location";
  }
  ZONE_NR {
    Int32 _FillValue -9999;
    String comment "A code indicating the distance offshore";
    String ioos_category "Location";
  }
  MPA_NAME {
    String comment "The name of the marine protected area in which the sample was collected.";
    String ioos_category "Location";
  }
  MPA_NR {
    String comment "A number identifying the marine protected area in which the sample was collected. Zero indicates unprotected status.";
    String ioos_category "Location";
  }
  ADMIN {
    String comment "A code of the name of the managed area in which the sample was collected.";
    String ioos_category "Location";
  }
  Administration_Description {
    String comment "Long Description for the the ADMIN field identifying the name of the managed areas in which the same was collected";
    String ioos_category "Other";
  }
  PROT {
    String comment "A boolean value indicating whether a sample was in a protected area (1), or not (0).";
    String ioos_category "Location";
  }
  DEPTH_STRAT {
    String comment "A code indicating less than or greater than 12 meters depths. Caribbean and GOM regions only.";
    String ioos_category "Other";
  }
  DEPTH_STRAT_DESCRIPTION {
    String comment "Long description for the DEPTH_STRAT code indicating greater than or less than 12 meters depth";
    String ioos_category "Other";
  }
  MIN_DEPTH {
    Float64 _FillValue -9999.0;
    Float64 actual_range 0.0, 30.1752;
    String comment "Minumum depth, in meters, of secondary sampling unit.";
    String ioos_category "Other";
    String units "m";
  }
  MAX_DEPTH {
    Float64 _FillValue -9999.0;
    Float64 actual_range 0.0, 30.48;
    String comment "Maximum depth, in meters, of secondary sampling unit.";
    String ioos_category "Other";
    String units "m";
  }
  METERS_COMPLETED {
    Int32 _FillValue -9999;
    Int32 actual_range 3, 20;
    String comment "A number indicating the number of meters on the transect completed for the sample.";
    String ioos_category "Other";
    String units "m";
  }
  SPECIES_CD {
    String comment "A code indicating the species for a sample. Consists of the first three letters of the genus and the first four of the species name.";
    String ioos_category "Taxonomy";
  }
  SPECIES_NAME {
    String comment "The name of the species that corresponds with the SPECIES_CD";
    String ioos_category "Taxonomy";
  }
  N {
    String comment "A boolean value indicating presence (1) or absence (0) of SPECIES_CD on transect.";
    String ioos_category "Taxonomy";
  }
  JUV {
    String comment "A boolean value indicating a coral < 4cm (juvenile; 1) or adult (0).";
    String ioos_category "Biology";
  }
  MAX_DIAMETER {
    Int32 _FillValue -9999;
    Int32 actual_range 1, 500;
    String comment "A number indicating the maximum diameter, in cm, of sampled coral colony.";
    String ioos_category "Biology";
    String units "cm";
  }
  PERP_DIAMETER {
    Int32 _FillValue -9999;
    Int32 actual_range 1, 450;
    String comment "A number indicating the perpendicular diameter, in cm, of sampled coral colony.";
    String ioos_category "Biology";
    String units "cm";
  }
  HEIGHT {
    Int32 _FillValue -9999;
    Int32 actual_range -1, 300;
    String comment "Average measurement of the height of living algae, seagrasses, sponges and upright gorgonians from the substrate to get a sense of bottom relief";
    String ioos_category "Biology";
    String units "cm";
  }
  OLD_MORT {
    Int32 _FillValue -9999;
    Int32 actual_range 0, 99;
    String comment "A number indicating the percentage of the coral colony surface area with old tissue mortality.";
    String ioos_category "Ecology";
    String units "percent";
  }
  RECENT_MORT {
    Int32 _FillValue -9999;
    Int32 actual_range 0, 100;
    String comment "A number indicating the percentage of the coral colony surface area with recent tissue mortality.";
    String ioos_category "Ecology";
    String units "percent";
  }
  BLEACH_CONDITION {
    String comment "A code classifying a coral as having no bleaching (N), partial bleaching (P) or total bleaching (T)";
    String ioos_category "Ecology";
  }
  DISEASE {
    String comment "A code classifying a coral as having disease present (P) or no disease (A)";
    String ioos_category "Ecology";
  }
  accession_url {
    String comment "url of the landing page of the accession pertaining to the data set";
    String ioos_category "Other";
  }
 }
  NC_GLOBAL {
    String acknowledgment "No use constraints are applicable.";
    String cdm_data_type "Point";
    String contributor_name "Coral Reef Conservation Program";
    String conventions "CF-1.6,ACDD-1.3";
    String creator_email "coralreef@noaa.gov";
    String creator_name "Coral Reef Conservation Program";
    String creator_url "https://coralreef.noaa.gov";
    String date_created "2024-10-18";
    String defaultDataQuery "&time<=max(time)&time>=min(time)";
    Float64 Easternmost_Easting -64.43145;
    String featureType "Point";
    String featuretype "point";
    Float64 geospatial_lat_max 18.4152;
    Float64 geospatial_lat_min 17.63612;
    String geospatial_lat_resolution "point";
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -64.43145;
    Float64 geospatial_lon_min -65.14981;
    String geospatial_lon_resolution "point";
    String geospatial_lon_units "degrees_east";
    String history 
"2024-12-08T06:13:00Z (local files)
2024-12-08T06:13:00Z https://www.ncei.noaa.gov/tabledap/CRCP_Coral_Demographic_Survey_USVI.das";
    String infoUrl "https://www.coris.noaa.gov/monitoring/biological.html";
    String institution "Coral Reef Conservation Program";
    String keywords "coral reef, corals, CoRIS, CRCP";
    String keywords_vocabulary "None";
    String license "No access constraints are applicable.";
    String metadata_conventions "Unidata Dataset Discovery v1.0";
    String naming_authority "gov.noaa.fisheries.www";
    String ncei_template_version "NCEI_NetCDF_Point_Template_v2.0";
    Float64 Northernmost_Northing 18.4152;
    String processing_level "4";
    String program "Coral Reef Conservation Program";
    String publisher_email "ncei_info@noaa.gov";
    String publisher_name "NOAA National Centers for Environmental Information (NCEI)";
    String publisher_url "https://ncei.noaa.gov";
    String references "https://www.fisheries.noaa.gov/national/habitat-conservation/deep-sea-coral-habitat";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 17.63612;
    String standard_name_vocabulary "CF Standard Name Table v70";
    String summary "Assessment of coral reef benthic communities in the U.S. Virgin Islands";
    String time_coverage_end "2023-08-18T00:00:00Z";
    String time_coverage_start "2013-07-08T00:00:00Z";
    String title "CRCP_Coral_Demographic_Survey_USVI";
    Float64 Westernmost_Easting -65.14981;
  }
}

 

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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 Data Access Protocol (DAP) and its selection constraints.

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/erdGlobecBottle.htmlTable?longitude,latitude,time,bottle_posn,temperature1&time>=2002-08-17T00:00:00Z&time<=2002-08-19T20:18:00Z
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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