ERDDAP > griddap > Data Access Form

Dataset Title:	USGS 10-m Digital Elevation Model (DEM): American Samoa: Ofu and Olosega
Institution:	U.S. Geological Survey (USGS)   (Dataset ID: usgs_dem_10m_ofuolosega)
Information:	Summary | License | FGDC | ISO 19115 | Metadata | Background | Make a graph

 

Dimensions	Start	Stride	Stop	Size	Spacing
latitude (degrees_north)				455	9.259341E-5 (even)
longitude (degrees_east)				961	9.259341E-5 (even)

Grid Variables (which always also download all of the dimension variables)

elev (elevation, meters)

File type: (more information) .asc - View OPeNDAP-style ISO-8859-1 comma-separated text. .csv - Download a ISO-8859-1 comma-separated text table (line 1: names; line 2: units; ISO 8601 times). .csvp - Download a ISO-8859-1 .csv file with line 1: name (units). Times are ISO 8601 strings. .csv0 - Download a ISO-8859-1 .csv file without column names or units. Times are ISO 8601 strings. .das - View the dataset's metadata via an ISO-8859-1 OPeNDAP Dataset Attribute Structure (DAS). .dds - View the dataset's structure via an ISO-8859-1 OPeNDAP Dataset Descriptor Structure (DDS). .dods - OPeNDAP clients use this to download the data in the DODS binary format. .esriAscii - Download an ISO-8859-1 ESRI ASCII file (latitude longitude data only; longitude must be all below or all above 180). .fgdc - View the dataset's UTF-8 FGDC .xml metadata. .graph - View a Make A Graph web page. .help - View a web page with a description of griddap. .html - View an OPeNDAP-style HTML Data Access Form. .htmlTable - View a UTF-8 .html web page with the data in a table. Times are ISO 8601 strings. .iso19115 - View the dataset's ISO 19115-2/19139 UTF-8 .xml metadata. .itx - Download an ISO-8859-1 Igor Text File. Each axis variable and each data variable becomes a wave. .json - View a table-like UTF-8 JSON file (missing value = 'null'; times are ISO 8601 strings). .jsonlCSV1 - View a UTF-8 JSON Lines CSV file with column names on line 1 (mv = 'null'; times are ISO 8601 strings). .jsonlCSV - View a UTF-8 JSON Lines CSV file without column names (mv = 'null'; times are ISO 8601 strings). .jsonlKVP - View a UTF-8 JSON Lines file with Key:Value pairs (missing value = 'null'; times are ISO 8601 strings). .mat - Download a MATLAB binary file. .nc - Download a NetCDF-3 binary file with COARDS/CF/ACDD metadata. .ncHeader - View the UTF-8 header (the metadata) for the NetCDF-3 .nc file. .ncml - View the dataset's structure and metadata as a UTF-8 NCML .xml file. .nccsv - Download a NetCDF-3-like 7-bit ASCII NCCSV .csv file with COARDS/CF/ACDD metadata. .nccsvMetadata - View the dataset's metadata as the top half of a 7-bit ASCII NCCSV .csv file. .ncoJson - Download a UTF-8 NCO lvl=2 JSON file with COARDS/CF/ACDD metadata. .odvTxt - Download time,latitude,longitude,otherVariables as an ODV Generic Spreadsheet File (.txt). .timeGaps - View a UTF-8 list of gaps in the time values which are larger than the median gap. .tsv - Download a ISO-8859-1 tab-separated text table (line 1: names; line 2: units; ISO 8601 times). .tsvp - Download a ISO-8859-1 .tsv file with line 1: name (units). Times are ISO 8601 strings. .tsv0 - Download a ISO-8859-1 .tsv file without column names or units. Times are ISO 8601 strings. .wav - Download a .wav audio file. All columns must be numeric and of the same type. .xhtml - View a UTF-8 XHTML (XML) file with the data in a table. Times are ISO 8601 strings. .geotif - View a grayscale GeoTIFF .tif file (for latitude longitude data; longitude must be all below or all above 180). .kml - View a Google Earth .kml file (for latitude, longitude data only). .smallPdf - View a small .pdf image file with a graph or map. .pdf - View a standard, medium-sized .pdf image file with a graph or map. .largePdf - View a large .pdf image file with a graph or map. .smallPng - View a small .png image file with a graph or map. .png - View a standard, medium-sized .png image file with a graph or map. .largePng - View a large .png image file with a graph or map. .transparentPng - View a .png image file (just the data, without axes, landmask, or legend).

(Documentation / Bypass this form)
 
Submit (Please be patient. It may take a while to get the data.)

 

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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 actual_range -14.194950995190526, -14.15291358490566;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 actual_range -169.68986279689236, -169.60097311875694;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  elev {
    Float32 _FillValue NaN;
    Float64 colorBarMaximum 635.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Other";
    String long_name "elevation";
    String positive "up";
    String standard_name "height";
    String units "meters";
  }
  NC_GLOBAL {
    String acknowledgement "The Pacific Islands Ocean Observing System (PacIOOS) is funded through the National Oceanic and Atmospheric Administration (NOAA) as a Regional Association within the U.S. Integrated Ocean Observing System (IOOS). PacIOOS is coordinated by the University of Hawaii School of Ocean and Earth Science and Technology (SOEST).";
    String cdm_data_type "Grid";
    String comment "These data are provided by USGS and subsequently distributed via THREDDS Data Server (TDS) and ERDDAP by PacIOOS.";
    String Conventions "CF-1.6, ACDD-1.3";
    String creator_email "tnm_help@usgs.gov";
    String creator_institution "U.S. Geological Survey (USGS)";
    String creator_name "U.S. Geological Survey (USGS)";
    String creator_type "institution";
    String creator_url "https://www.usgs.gov";
    String date_created "2015-05-11";
    String date_issued "2015-05-11";
    String date_metadata_modified "2023-01-20";
    String date_modified "2015-05-11";
    String drawLandMask "off";
    Float64 Easternmost_Easting -169.60097311875694;
    String geospatial_bounds "POLYGON ((-14.194997 -169.689909, -14.152867 -169.689909, -14.152867 -169.600927, -14.194997 -169.600927, -14.194997 -169.689909))";
    String geospatial_bounds_crs "EPSG:4326";
    Float64 geospatial_lat_max -14.15291358490566;
    Float64 geospatial_lat_min -14.194950995190526;
    Float64 geospatial_lat_resolution 9.259341472437485e-5;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -169.60097311875694;
    Float64 geospatial_lon_min -169.68986279689236;
    Float64 geospatial_lon_resolution 9.259341472439194e-5;
    String geospatial_lon_units "degrees_east";
    String history 
"2015-05-11T00:00:00Z PacIOOS obtained ArcInfo Binary Grids from The National Map Viewer of USGS then mosaicked and converted to NetCDF format and EPSG:4326 spatial reference system.
2024-11-21T16:33:57Z https://pae-paha.pacioos.hawaii.edu/thredds/dodsC/usgs_dem_10m_ofuolosega
2024-11-21T16:33:57Z https://pae-paha.pacioos.hawaii.edu/erddap/griddap/usgs_dem_10m_ofuolosega.das";
    String id "usgs_dem_10m_ofuolosega";
    String infoUrl "https://www.usgs.gov/core-science-systems/national-geospatial-program/national-map";
    String institution "U.S. Geological Survey (USGS)";
    String instrument "Not Applicable > Not Applicable";
    String instrument_vocabulary "GCMD Instrument Keywords";
    String ISO_Topic_Categories "elevation";
    String keywords "Earth Science > Land Surface > Topography > Terrain Elevation > Digital Elevation/Terrain Model (Dem)";
    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, University of Hawaii, PacIOOS, NOAA, State of Hawaii 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 locations "Ocean > Pacific Ocean > South Pacific Ocean > Polynesia > American Samoa > Manua, Ocean > Pacific Ocean > South Pacific Ocean > Polynesia > American Samoa > Ofu, Ocean > Pacific Ocean > South Pacific Ocean > Polynesia > American Samoa > Olosega";
    String locations_vocabulary "GCMD Location Keywords";
    String metadata_link "https://www.pacioos.hawaii.edu/metadata/usgs_dem_10m_ofuolosega.html";
    String naming_authority "org.pacioos";
    Float64 Northernmost_Northing -14.15291358490566;
    String platform "Models/Analyses > > DEM > Digital Elevation Model";
    String platform_vocabulary "GCMD Platform Keywords";
    String program "Pacific Islands Ocean Observing System (PacIOOS)";
    String project "Pacific Islands Ocean Observing System (PacIOOS)";
    String publisher_email "info@pacioos.org";
    String publisher_institution "Pacific Islands Ocean Observing System (PacIOOS)";
    String publisher_name "Pacific Islands Ocean Observing System (PacIOOS)";
    String publisher_type "institution";
    String publisher_url "http://www.pacioos.hawaii.edu";
    String references "https://www.pacioos.hawaii.edu/metadata/as_usgs_ofuolo_dem10m_hillshade.html";
    String source "USGS 1/3 arc-second DEM quadrangles";
    String sourceUrl "https://pae-paha.pacioos.hawaii.edu/thredds/dodsC/usgs_dem_10m_ofuolosega";
    Float64 Southernmost_Northing -14.194950995190526;
    String standard_name_vocabulary "CF Standard Name Table v39";
    String summary "A 10-meter resolution land surface digital elevation model (DEM) for the Manua Islands of Ofu and Olosega in American Samoa from U.S. Geological Survey (USGS) 1/3 arc-second DEM quadrangles. For a grayscale hillshade image layer of this dataset, see \"as_usgs_ofuolo_dem10m_hillshade\" in the distribution links listed in the metadata.";
    String time_coverage_duration "P0D";
    String time_coverage_resolution "P0D";
    String title "USGS 10-m Digital Elevation Model (DEM): American Samoa: Ofu and Olosega";
    Float64 Westernmost_Easting -169.68986279689236;
  }
}

 

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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 Data Access Protocol (DAP) and its projection 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. 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.

 

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