Make A Graph

Dataset Title:	Landsat Satellite Surface Temperature version 3, Mt. Hope Bay
Institution:	Rhode Island Data Discovery/United States Geological Survey (Dataset ID: landsat_sst_mthope_v3_data)
Information:	Summary \| License \| Metadata \| Background \| Data Access Form

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Graph Type:
X Axis:
Y Axis:
Color:

Dimensions

Start

Stop

time (UTC)

specify just 1 value →

Y (count)

X (count)

Graph Settings
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:
(Documentation / Bypass this form

)

[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 {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 4.52304e+8, 1.6644096e+9;
    String axis "T";
    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";
  }
  Y {
    Int16 actual_range 0, 375;
    String long_name "Y";
    String source_name "y";
    String units "count";
  }
  X {
    Int16 actual_range 0, 267;
    String long_name "X";
    String source_name "x";
    String units "count";
  }
  satellite {
    Float64 colorBarMaximum 8.0;
    Float64 colorBarMinimum 5.0;
    String long_name "Landsat Satellite Number";
    String note "This value is for the entire satellite image, so all values at a given timestep will be the same.";
    String units "Landsat 5, Landsat 7, or Landsat 8.";
  }
  clouds {
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 0.0;
    String long_name "cloud cover over Mount Hope Bay";
    String note "This value is for the entire satellite image, so all values at a given timestep will be the same.";
    String standard_name "cloud_area_fraction";
    String units "% clouds";
  }
  temperature {
    Float64 colorBarMaximum 25.0;
    Float64 colorBarMinimum 0.0;
    String comment "Accuracy of Satellite = within 0.1 degrees C for Landsat 8, 0.6 degrees C for Landsat 7, and 0.5 degrees C for Landsat 5.";
    String long_name "Surface Temperature";
    String standard_name "surface_temperature";
    String units "degC";
  }
  temperature_detrend {
    Float64 colorBarMaximum 5.0;
    Float64 colorBarMinimum -5.0;
    String comment "Accuracy of Satellite = within 0.1 degrees C for Landsat 8, 0.6 degrees C for Landsat 7, and 0.5 degrees C for Landsat 5.";
    String long_name "Surface Temperature - deseasonalized and detrended";
    String units "degree_C";
  }
  NC_GLOBAL {
    String cdm_data_type "Grid";
    String comment "Attribute Accuracy Report: Satellite-derived orthorectified brightness temperature was measured within 0.1 degrees C for Landsat 8, 0.6 degrees C for Landsat 7, and 0.5 degrees C for Landsat 5. Satellite measurements were compared to in situ (buoy) surface temperatures from 2003 to 2019, and the bias between the RI DEM buoy temperatures and the satellite temperatures at the pixel of the buoys was removed from each satellite pixel. See https://www.usgs.gov/land-resources/nli/landsat/landsat-surface-reflectance?qt-science_support_page_related_con=0#qt-science_support_page_related_con for more information.";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String creator_name "Rhode Island Data Discovery/United States Geological Survey";
    String defaultGraphQuery "temperature[0:last][0:last][last]&.draw=surface&.vars=X|Y|temperature";
    String description "Landsat-derived water surface in Mt. Hope Bay with K-fold bias correction from RI DEM buoys";
    String history 
"Converted from Landsat 5, 7, and 8 Surface Reflectance geotiff products to netCDF. The units were changed from K to degrees C and the average bias determined through RI DEM buoy comparison in Narragansett Bay (2003-2019) to each satellite was removed from all scenes from the corresponding satellite. The errors were determined by using a K-fold cross-validation to minimize error at each satellite pixel. The scenes were also cloud masked, land masked, and stripes in Landsat 7 imagery (due to sensor failure) were masked as well. A buoy comparison was only conducted within Narragansett Bay for Landsat scenes with less than 50% cloud cover, and applied to available scenes back to 1984 for Landsat 5, 1999 for Landsat 7, and 2013 for Landsat 8. As a result, data uncertainties are unknown outside of the Narragansett Bay region, for scenes with greater cloud cover, and scenes before 2003.
2025-04-28T00:17:37Z (local files)
2025-04-28T00:17:37Z https://pricaimcit.services.brown.edu/griddap/landsat_sst_mthope_v3_data.das";
    String infoUrl "https://earthexplorer.usgs.gov";
    String institution "Rhode Island Data Discovery/United States Geological Survey";
    String keywords "amount, area, atmosphere, bay, cloud, cloud cover, cloud_area_fraction, cloudiness, clouds, cover, data, deseasonalized, detrended, discovery, earth, Earth Science > Atmosphere > Clouds > Cloud Amount/Frequency, Earth Science > Land Surface > Land Temperature > Land Surface Temperature, Earth Science > Oceans > Ocean Temperature > Sea Surface Temperature, fraction, frequency, geological, hope, island, land, landsat, mount, number, ocean, oceans, over, rhode, satellite, science, sea, states, surface, surface_temperature, survey, temerapture, temperature, temperature_detrend, time, united, version";
    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 publication "https://doi.org/10.26300/ja0b-xa86";
    String publisher_name "Rhode Island Data Discovery/United States Geological Survey";
    String publisher_url "https://riddc.brown.edu/";
    String references "Rhode Island Data Discovery/United States Geological Survey";
    String source "https://earthexplorer.usgs.gov/ accessed through https://code.earthengine.google.com/";
    String sourceUrl "(local files)";
    String standard_name_vocabulary "CF Standard Name Table v55";
    String summary "Landsat-derived water surface in Mt. Hope Bay with K-fold bias correction from RI DEM buoys. For translation from the x,y coordinates to latitude and longitude see the \"Landsat Satellite Coordinates v3 - Mt. Hope Bay\" dataset.";
    String time_coverage_end "2022-09-29T00:00:00Z";
    String time_coverage_start "1984-05-02T00:00:00Z";
    String title "Landsat Satellite Surface Temperature version 3, Mt. Hope Bay";
  }
}

Using griddap to Request Data and Graphs from Gridded Datasets

griddap lets you request a data subset, graph, or map from a gridded dataset (for example, sea surface temperature data from a satellite), via a specially formed URL. griddap uses the OPeNDAP (external link)

Data Access Protocol (DAP) (external link)

and its projection 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. It makes 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.

griddap request URLs must be in the form
https://coastwatch.pfeg.noaa.gov/erddap/griddap/datasetID.fileType{?query}
For example,
https://coastwatch.pfeg.noaa.gov/erddap/griddap/jplMURSST41.htmlTable?analysed_sst[(2002-06-01T09:00:00Z)][(-89.99):1000:(89.99)][(-179.99):1000:(180.0)]
Thus, the query is often a data variable name (e.g., analysed_sst), followed by [(start):stride:(stop)] (or a shorter variation of that) for each of the variable's dimensions (for example, [time][latitude][longitude]).

For details, see the griddap Documentation.